{"id":31322,"date":"2026-09-28T09:01:24","date_gmt":"2026-09-28T01:01:24","guid":{"rendered":"https:\/\/www.cnspd.com\/?p=31322"},"modified":"2026-09-28T09:53:02","modified_gmt":"2026-09-28T01:53:02","slug":"ats-bms-integration-guide-for-commercial-buildings","status":"publish","type":"post","link":"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/","title":{"rendered":"ATS BMS Integration Guide for Commercial Buildings"},"content":{"rendered":"\t\t<div data-elementor-type=\"wp-post\" data-elementor-id=\"31322\" class=\"elementor elementor-31322\" data-elementor-post-type=\"post\">\n\t\t\t\t<div class=\"elementor-element elementor-element-8ff3442 e-flex e-con-boxed e-con e-parent\" data-id=\"8ff3442\" data-element_type=\"container\" data-e-type=\"container\">\n\t\t\t\t\t<div class=\"e-con-inner\">\n\t\t\t\t<div class=\"elementor-element elementor-element-6943562 elementor-widget elementor-widget-html\" data-id=\"6943562\" data-element_type=\"widget\" data-e-type=\"widget\" data-widget_type=\"html.default\">\n\t\t\t\t<div class=\"elementor-widget-container\">\n\t\t\t\t\t<style>\r\n#leeyee-ats-bms-guide,\r\n#leeyee-ats-bms-guide * {\r\n  box-sizing: border-box;\r\n}\r\n\r\n#leeyee-ats-bms-guide {\r\n  --ly-blue: #004898;\r\n  --ly-blue-dark: #00376f;\r\n  --ly-blue-soft: #eef5ff;\r\n  --ly-blue-soft-2: #f7fbff;\r\n  --ly-text: #263442;\r\n  --ly-heading: #14283a;\r\n  --ly-muted: #667788;\r\n  --ly-border: #d9e4ed;\r\n  --ly-warning-bg: #fff8ed;\r\n  --ly-warning-border: #e8c994;\r\n  --ly-success-bg: #f4faf7;\r\n  --ly-success-border: #bfddcd;\r\n\r\n  width: 100%;\r\n  max-width: 860px;\r\n  margin: 0 auto;\r\n  padding: 6px 24px 64px;\r\n\r\n  color: var(--ly-text);\r\n  font-family: inherit;\r\n  font-size: 17px;\r\n  line-height: 1.72;\r\n  overflow-wrap: break-word;\r\n}\r\n\r\n#leeyee-ats-bms-guide p {\r\n  margin: 0 0 18px;\r\n}\r\n\r\n#leeyee-ats-bms-guide h2,\r\n#leeyee-ats-bms-guide h3 {\r\n  color: var(--ly-heading);\r\n  font-weight: 750;\r\n  line-height: 1.25;\r\n  letter-spacing: -0.015em;\r\n}\r\n\r\n#leeyee-ats-bms-guide h2 {\r\n  margin: 52px 0 20px;\r\n  font-size: clamp(28px, 3.2vw, 34px);\r\n}\r\n\r\n#leeyee-ats-bms-guide h3 {\r\n  margin: 34px 0 14px;\r\n  font-size: clamp(22px, 2.5vw, 26px);\r\n}\r\n\r\n#leeyee-ats-bms-guide a {\r\n  color: var(--ly-blue);\r\n  text-decoration-thickness: 1px;\r\n  text-underline-offset: 3px;\r\n}\r\n\r\n#leeyee-ats-bms-guide a:hover {\r\n  color: var(--ly-blue-dark);\r\n}\r\n\r\n#leeyee-ats-bms-guide strong {\r\n  color: #193249;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-kicker {\r\n  display: inline-block;\r\n  margin: 0 0 12px;\r\n  color: var(--ly-blue);\r\n  font-size: 14px;\r\n  font-weight: 750;\r\n  line-height: 1.4;\r\n  letter-spacing: .035em;\r\n  text-transform: uppercase;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-lead {\r\n  margin-bottom: 17px;\r\n  color: #203a50;\r\n  font-size: 19px;\r\n  line-height: 1.65;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-quick {\r\n  margin: 28px 0 36px;\r\n  padding: 26px 28px;\r\n  border: 1px solid #bed4e7;\r\n  border-left: 5px solid var(--ly-blue);\r\n  border-radius: 12px;\r\n  background: var(--ly-blue-soft-2);\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-quick h2 {\r\n  margin: 0 0 14px;\r\n  font-size: 27px;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-answer {\r\n  margin-bottom: 18px;\r\n  color: #17364f;\r\n  font-size: 18px;\r\n  font-weight: 650;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-key-line {\r\n  margin-top: 18px;\r\n  padding: 14px 16px;\r\n  border-radius: 8px;\r\n  background: #fff;\r\n  color: #173750;\r\n  font-weight: 720;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-ref {\r\n  display: inline-block;\r\n  margin-left: 2px;\r\n  color: var(--ly-blue);\r\n  font-size: .8em;\r\n  font-weight: 750;\r\n  text-decoration: none;\r\n  vertical-align: super;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-note,\r\n#leeyee-ats-bms-guide .ly-warning,\r\n#leeyee-ats-bms-guide .ly-engineering {\r\n  margin: 24px 0;\r\n  padding: 19px 21px;\r\n  border-radius: 10px;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-note {\r\n  border: 1px solid #c7dceb;\r\n  background: var(--ly-blue-soft-2);\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-engineering {\r\n  border: 1px solid var(--ly-success-border);\r\n  background: var(--ly-success-bg);\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-warning {\r\n  border: 1px solid var(--ly-warning-border);\r\n  border-left: 5px solid #c4771b;\r\n  background: var(--ly-warning-bg);\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-note-title {\r\n  display: block;\r\n  margin-bottom: 7px;\r\n  color: var(--ly-heading);\r\n  font-weight: 750;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-warning .ly-note-title {\r\n  color: #704100;\r\n}\r\n\r\n#leeyee-ats-bms-guide ul,\r\n#leeyee-ats-bms-guide ol {\r\n  margin: 12px 0 22px;\r\n  padding-left: 25px;\r\n}\r\n\r\n#leeyee-ats-bms-guide li {\r\n  margin: 7px 0;\r\n}\r\n\r\n\/* ---------- Tables ---------- *\/\r\n\r\n#leeyee-ats-bms-guide .ly-table-wrap {\r\n  width: 100%;\r\n  margin: 22px 0 16px;\r\n}\r\n\r\n#leeyee-ats-bms-guide table {\r\n  width: 100%;\r\n  border-collapse: separate;\r\n  border-spacing: 0;\r\n  table-layout: fixed;\r\n  border: 1px solid var(--ly-border);\r\n  border-radius: 10px;\r\n  overflow: hidden;\r\n  background: #fff;\r\n  font-size: 15.5px;\r\n  line-height: 1.5;\r\n}\r\n\r\n#leeyee-ats-bms-guide th,\r\n#leeyee-ats-bms-guide td {\r\n  padding: 13px 14px;\r\n  border-right: 1px solid var(--ly-border);\r\n  border-bottom: 1px solid var(--ly-border);\r\n  text-align: left;\r\n  vertical-align: top;\r\n  overflow-wrap: anywhere;\r\n}\r\n\r\n#leeyee-ats-bms-guide th:last-child,\r\n#leeyee-ats-bms-guide td:last-child {\r\n  border-right: 0;\r\n}\r\n\r\n#leeyee-ats-bms-guide tbody tr:last-child td {\r\n  border-bottom: 0;\r\n}\r\n\r\n#leeyee-ats-bms-guide thead th {\r\n  background: var(--ly-blue);\r\n  color: #fff;\r\n  font-weight: 720;\r\n}\r\n\r\n#leeyee-ats-bms-guide tbody tr:nth-child(even) td {\r\n  background: #fbfdff;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-table-note {\r\n  margin-top: 10px;\r\n  color: var(--ly-muted);\r\n  font-size: 14px;\r\n  line-height: 1.55;\r\n}\r\n\r\n\/* ---------- Images ---------- *\/\r\n\r\n#leeyee-ats-bms-guide .ly-visual {\r\n  display: block;\r\n  width: 100%;\r\n  max-width: 860px;\r\n  margin: 30px auto 34px;\r\n  padding: 0;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-visual img {\r\n  display: block;\r\n  width: 100%;\r\n  max-width: 100%;\r\n  height: auto;\r\n  margin: 0;\r\n  border: 1px solid #dce6ee;\r\n  border-radius: 12px;\r\n  background: #fff;\r\n  box-shadow: 0 6px 22px rgba(21, 51, 76, 0.06);\r\n  object-fit: contain;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-visual figcaption {\r\n  width: 100%;\r\n  margin: 10px auto 0;\r\n  padding: 0 6px;\r\n  color: var(--ly-muted);\r\n  font-size: 14px;\r\n  line-height: 1.55;\r\n  text-align: center;\r\n}\r\n\r\n\/* ---------- Comparison blocks ---------- *\/\r\n\r\n#leeyee-ats-bms-guide .ly-two-col {\r\n  display: grid;\r\n  grid-template-columns: repeat(2, minmax(0, 1fr));\r\n  gap: 18px;\r\n  margin: 22px 0 28px;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-mini-panel {\r\n  padding: 20px;\r\n  border: 1px solid var(--ly-border);\r\n  border-radius: 10px;\r\n  background: #fff;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-mini-panel h3 {\r\n  margin: 0 0 10px;\r\n  font-size: 21px;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-mini-panel p:last-child,\r\n#leeyee-ats-bms-guide .ly-mini-panel ul:last-child {\r\n  margin-bottom: 0;\r\n}\r\n\r\n\/* ---------- Steps ---------- *\/\r\n\r\n#leeyee-ats-bms-guide .ly-steps {\r\n  margin: 23px 0 28px;\r\n  padding: 0;\r\n  list-style: none;\r\n  counter-reset: ly-step;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-steps > li {\r\n  position: relative;\r\n  margin: 0;\r\n  padding: 0 0 27px 55px;\r\n  counter-increment: ly-step;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-steps > li:last-child {\r\n  padding-bottom: 0;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-steps > li::before {\r\n  content: counter(ly-step);\r\n  position: absolute;\r\n  top: 0;\r\n  left: 0;\r\n  display: grid;\r\n  width: 36px;\r\n  height: 36px;\r\n  place-items: center;\r\n  border-radius: 50%;\r\n  background: var(--ly-blue);\r\n  color: #fff;\r\n  font-size: 15px;\r\n  font-weight: 750;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-steps > li:not(:last-child)::after {\r\n  content: \"\";\r\n  position: absolute;\r\n  top: 39px;\r\n  bottom: 3px;\r\n  left: 17px;\r\n  width: 2px;\r\n  background: #d9e6f1;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-steps h3 {\r\n  margin: 0 0 8px;\r\n  font-size: 21px;\r\n}\r\n\r\n\/* ---------- Checklist ---------- *\/\r\n\r\n#leeyee-ats-bms-guide .ly-checklist {\r\n  margin: 30px 0;\r\n  padding: 26px 28px;\r\n  border: 1px solid #bfd4e6;\r\n  border-radius: 12px;\r\n  background: var(--ly-blue-soft-2);\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-checklist h2 {\r\n  margin: 0 0 14px;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-check-grid {\r\n  display: grid;\r\n  grid-template-columns: repeat(2, minmax(0, 1fr));\r\n  gap: 9px 24px;\r\n  margin: 17px 0 0;\r\n  padding: 0;\r\n  list-style: none;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-check-grid li {\r\n  position: relative;\r\n  margin: 0;\r\n  padding-left: 26px;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-check-grid li::before {\r\n  content: \"\u2713\";\r\n  position: absolute;\r\n  left: 0;\r\n  top: 0;\r\n  color: var(--ly-blue);\r\n  font-weight: 800;\r\n}\r\n\r\n\/* ---------- CTA ---------- *\/\r\n\r\n#leeyee-ats-bms-guide .ly-cta {\r\n  margin: 32px 0 42px;\r\n  padding: 25px 26px;\r\n  border: 1px solid #c7d8e7;\r\n  border-radius: 12px;\r\n  background: #fff;\r\n  box-shadow: 0 5px 20px rgba(0, 72, 152, 0.07);\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-cta h2 {\r\n  margin: 0 0 10px;\r\n  font-size: 26px;\r\n}\r\n\r\n#leeyee-ats-bms-guide .leeyee-about-btn-light.leeyee-site-popup-btn {\r\n  appearance: none;\r\n  -webkit-appearance: none;\r\n  display: inline-flex;\r\n  min-height: 50px;\r\n  align-items: center;\r\n  justify-content: center;\r\n  margin: 5px 0 0;\r\n  padding: 12px 24px;\r\n  border: 2px solid var(--ly-blue);\r\n  border-radius: 10px;\r\n  background: #fff;\r\n  color: var(--ly-blue);\r\n  box-shadow: 0 4px 12px rgba(0, 72, 152, 0.12);\r\n  font: inherit;\r\n  font-size: 16px;\r\n  font-weight: 720;\r\n  line-height: 1.35;\r\n  text-align: center;\r\n  cursor: pointer;\r\n  transition:\r\n    background-color .18s ease,\r\n    color .18s ease,\r\n    box-shadow .18s ease,\r\n    transform .18s ease;\r\n}\r\n\r\n#leeyee-ats-bms-guide .leeyee-about-btn-light.leeyee-site-popup-btn:hover {\r\n  background: var(--ly-blue);\r\n  color: #fff;\r\n  box-shadow: 0 7px 17px rgba(0, 72, 152, 0.18);\r\n  transform: translateY(-1px);\r\n}\r\n\r\n#leeyee-ats-bms-guide .leeyee-about-btn-light.leeyee-site-popup-btn:focus-visible {\r\n  outline: 3px solid rgba(0, 72, 152, 0.28);\r\n  outline-offset: 3px;\r\n}\r\n\r\n#leeyee-ats-bms-guide .leeyee-about-btn-light .w-btn-label {\r\n  display: inline-block;\r\n}\r\n\r\n\/* ---------- FAQ ---------- *\/\r\n\r\n#leeyee-ats-bms-guide .ly-faq {\r\n  margin-top: 26px;\r\n  border-top: 1px solid var(--ly-border);\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-faq details {\r\n  border-bottom: 1px solid var(--ly-border);\r\n  background: #fff;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-faq summary {\r\n  position: relative;\r\n  padding: 18px 40px 18px 0;\r\n  color: var(--ly-heading);\r\n  font-weight: 700;\r\n  line-height: 1.45;\r\n  cursor: pointer;\r\n  list-style: none;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-faq summary::-webkit-details-marker {\r\n  display: none;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-faq summary::after {\r\n  content: \"+\";\r\n  position: absolute;\r\n  right: 4px;\r\n  top: 14px;\r\n  color: var(--ly-blue);\r\n  font-size: 25px;\r\n  font-weight: 500;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-faq details[open] summary::after {\r\n  content: \"\u2013\";\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-faq-answer {\r\n  padding: 0 34px 17px 0;\r\n}\r\n\r\n\/* ---------- Related + references ---------- *\/\r\n\r\n#leeyee-ats-bms-guide .ly-related {\r\n  margin: 42px 0 0;\r\n  padding: 21px 22px;\r\n  border-top: 1px solid var(--ly-border);\r\n  border-bottom: 1px solid var(--ly-border);\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-related h2 {\r\n  margin: 0 0 10px;\r\n  font-size: 24px;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-references {\r\n  margin-top: 50px;\r\n  padding-top: 8px;\r\n  border-top: 1px solid var(--ly-border);\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-references ol {\r\n  padding-left: 23px;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-references li {\r\n  margin: 10px 0;\r\n  color: #536678;\r\n  font-size: 14px;\r\n  line-height: 1.6;\r\n}\r\n\r\n#leeyee-ats-bms-guide .ly-references a {\r\n  overflow-wrap: anywhere;\r\n}\r\n\r\n\/* ---------- Responsive ---------- *\/\r\n\r\n@media (max-width: 820px) {\r\n  #leeyee-ats-bms-guide {\r\n    padding-left: 22px;\r\n    padding-right: 22px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-visual {\r\n    width: 100%;\r\n    max-width: 100%;\r\n    margin: 26px auto 30px;\r\n  }\r\n}\r\n\r\n@media (max-width: 768px) {\r\n  #leeyee-ats-bms-guide {\r\n    font-size: 16.5px;\r\n    line-height: 1.7;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide h2 {\r\n    margin-top: 44px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-two-col,\r\n  #leeyee-ats-bms-guide .ly-check-grid {\r\n    grid-template-columns: 1fr;\r\n  }\r\n}\r\n\r\n@media (max-width: 600px) {\r\n  #leeyee-ats-bms-guide {\r\n    padding: 4px 17px 52px;\r\n    font-size: 16px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-lead {\r\n    font-size: 17.5px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-quick,\r\n  #leeyee-ats-bms-guide .ly-checklist,\r\n  #leeyee-ats-bms-guide .ly-cta {\r\n    padding: 20px 18px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-visual {\r\n    width: 100%;\r\n    max-width: 100%;\r\n    margin: 22px auto 27px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-visual img {\r\n    width: 100%;\r\n    max-width: 100%;\r\n    height: auto;\r\n    border-radius: 9px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-visual figcaption {\r\n    margin-top: 8px;\r\n    padding: 0 2px;\r\n    font-size: 13.5px;\r\n    line-height: 1.5;\r\n    text-align: left;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap table,\r\n  #leeyee-ats-bms-guide .ly-table-wrap thead,\r\n  #leeyee-ats-bms-guide .ly-table-wrap tbody,\r\n  #leeyee-ats-bms-guide .ly-table-wrap tr,\r\n  #leeyee-ats-bms-guide .ly-table-wrap th,\r\n  #leeyee-ats-bms-guide .ly-table-wrap td {\r\n    display: block;\r\n    width: 100%;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap table {\r\n    border: 0;\r\n    background: transparent;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap thead {\r\n    display: none;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap tr {\r\n    margin-bottom: 14px;\r\n    border: 1px solid var(--ly-border);\r\n    border-radius: 9px;\r\n    overflow: hidden;\r\n    background: #fff;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap td {\r\n    position: relative;\r\n    min-height: 42px;\r\n    padding: 11px 13px 11px 45%;\r\n    border-right: 0;\r\n    border-bottom: 1px solid var(--ly-border);\r\n    background: #fff !important;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap td:last-child {\r\n    border-bottom: 0;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap td::before {\r\n    content: attr(data-label);\r\n    position: absolute;\r\n    top: 11px;\r\n    left: 13px;\r\n    width: calc(45% - 22px);\r\n    color: var(--ly-heading);\r\n    font-size: 14px;\r\n    font-weight: 720;\r\n    line-height: 1.4;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-steps > li {\r\n    padding-left: 49px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .leeyee-about-btn-light.leeyee-site-popup-btn {\r\n    width: 100%;\r\n    padding-left: 16px;\r\n    padding-right: 16px;\r\n  }\r\n}\r\n\r\n@media (max-width: 430px) {\r\n  #leeyee-ats-bms-guide {\r\n    padding-left: 15px;\r\n    padding-right: 15px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide h2 {\r\n    font-size: 27px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide h3 {\r\n    font-size: 21px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap td {\r\n    padding-left: 43%;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap td::before {\r\n    width: calc(43% - 20px);\r\n  }\r\n}\r\n\r\n@media (max-width: 360px) {\r\n  #leeyee-ats-bms-guide {\r\n    padding-left: 13px;\r\n    padding-right: 13px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-quick,\r\n  #leeyee-ats-bms-guide .ly-checklist,\r\n  #leeyee-ats-bms-guide .ly-cta,\r\n  #leeyee-ats-bms-guide .ly-mini-panel {\r\n    padding-left: 15px;\r\n    padding-right: 15px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap td {\r\n    padding: 10px 11px;\r\n  }\r\n\r\n  #leeyee-ats-bms-guide .ly-table-wrap td::before {\r\n    position: static;\r\n    display: block;\r\n    width: auto;\r\n    margin-bottom: 4px;\r\n  }\r\n}\r\n<\/style>\r\n\r\n<article id=\"leeyee-ats-bms-guide\">\r\n\r\n  <section>\r\n    <span class=\"ly-kicker\">B2B Engineering &amp; Project Integration Guide<\/span>\r\n\r\n    <p class=\"ly-lead\">\r\n      <strong>ATS BMS integration<\/strong> means connecting an automatic transfer switch to a building management system so the BMS can receive documented ATS status, alarm or operating information. The interface must be planned around the actual ATS controller and the project's required BMS points.\r\n    <\/p>\r\n\r\n    <p>\r\n      For LEEYEE compact 2P and 4P ATS projects, BMS functionality should be treated as a <strong>project-specific interface requirement<\/strong>, not assumed as a standard function of the compact transfer switch. First confirm what the building needs to monitor. Then confirm whether the selected ATS\/controller provides the required contact outputs, communication interface or another approved integration method.\r\n    <\/p>\r\n\r\n    <div class=\"ly-engineering\">\r\n      <span class=\"ly-note-title\">Important LEEYEE product boundary<\/span>\r\n      The compact LEEYEE ATS format is designed around local automatic\/manual source transfer and local status indication. This article does <strong>not<\/strong> state that the standard compact 2P or 4P ATS includes BMS dry contacts, RS485, Modbus, BACnet or remote-control functions. If any of these functions are mandatory, they must be confirmed before the ATS model is approved.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-quick\">\r\n    <div id=\"ez-toc-container\" class=\"ez-toc-v2_0_87 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#quick-answer-how-should-an-ats-be-integrated-with-a-bms\" >Quick Answer: How Should an ATS Be Integrated with a BMS?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#how-this-guide-applies-to-a-compact-2p-or-4p-leeyee-ats\" >How This Guide Applies to a Compact 2P or 4P LEEYEE ATS<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#why-does-a-commercial-building-bms-need-ats-status\" >Why Does a Commercial Building BMS Need ATS Status?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#what-ats-points-should-the-bms-monitor\" >What ATS Points Should the BMS Monitor?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#what-is-a-dry-contact-in-ats-bms-integration\" >What Is a Dry Contact in ATS BMS Integration?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#dry-contact-vs-rs485-modbus-which-method-fits-the-project\" >Dry Contact vs RS485 \/ Modbus: Which Method Fits the Project?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#how-to-build-an-ats-bms-point-list\" >How to Build an ATS BMS Point List<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#monitoring-an-ats-is-not-the-same-as-controlling-it\" >Monitoring an ATS Is Not the Same as Controlling It<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#what-if-the-building-bms-uses-bacnet\" >What If the Building BMS Uses BACnet?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#do-not-confuse-ats-information-with-generator-information\" >Do Not Confuse ATS Information with Generator Information<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#how-iec-60947-6-1-relates-to-the-project\" >How IEC 60947-6-1 Relates to the Project<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#common-ats-bms-integration-mistakes\" >Common ATS BMS Integration Mistakes<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#before-ordering-a-leeyee-ats-for-a-bms-project\" >Before Ordering a LEEYEE ATS for a BMS Project<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#have-a-bms-point-list-for-your-ats-project\" >Have a BMS Point List for Your ATS Project?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#ats-bms-integration-faq\" >ATS BMS Integration FAQ<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#related-ats-selection-guidance\" >Related ATS Selection Guidance<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"#\" data-href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/#references\" >References<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"quick-answer-how-should-an-ats-be-integrated-with-a-bms\"><\/span>Quick Answer: How Should an ATS Be Integrated with a BMS?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p class=\"ly-answer\">\r\n      Start with the required BMS point list. Then verify whether the selected ATS\/controller can provide each point through a physical contact, a documented communication interface or an approved external interface solution.\r\n    <\/p>\r\n\r\n    <div class=\"ly-table-wrap\">\r\n      <table aria-label=\"ATS BMS integration requirement guide\">\r\n        <thead>\r\n          <tr>\r\n            <th>Project Requirement<\/th>\r\n            <th>Possible Method<\/th>\r\n            <th>What Must Be Confirmed<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"Project Requirement\">Basic local automatic transfer only<\/td>\r\n            <td data-label=\"Possible Method\">Standard compact ATS configuration<\/td>\r\n            <td data-label=\"What Must Be Confirmed\">Voltage, current, poles and source arrangement<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Project Requirement\">Source or position status to BMS<\/td>\r\n            <td data-label=\"Possible Method\">Dry \/ auxiliary contacts if provided<\/td>\r\n            <td data-label=\"What Must Be Confirmed\">Actual terminal function and contact logic<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Project Requirement\">Multiple ATS status points<\/td>\r\n            <td data-label=\"Possible Method\">RS485 \/ Modbus if controller supports it<\/td>\r\n            <td data-label=\"What Must Be Confirmed\">Protocol, serial settings and register map<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Project Requirement\">BACnet-based BMS<\/td>\r\n            <td data-label=\"Possible Method\">Native support or suitable gateway<\/td>\r\n            <td data-label=\"What Must Be Confirmed\">Protocol mapping and gateway compatibility<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Project Requirement\">Remote transfer or test control<\/td>\r\n            <td data-label=\"Possible Method\">Dedicated input or documented communication command<\/td>\r\n            <td data-label=\"What Must Be Confirmed\">Controller support, authority and interlocks<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <div class=\"ly-key-line\">\r\n      \u201cBMS compatible\u201d is not enough for model approval. The required monitoring points and interface must be confirmed against the actual ATS\/controller documentation.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <figure class=\"ly-visual\">\r\n    <img loading=\"lazy\"\r\n      src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/09\/ats-bms-integration-architecture.webp\"\r\n      alt=\"ATS BMS integration architecture showing dry contacts, RS485 Modbus and BACnet gateway connections\"\r\n      width=\"1448\"\r\n      height=\"1086\"\r\n      loading=\"lazy\"\r\n      decoding=\"async\">\r\n    <figcaption>\r\n      Typical ATS-to-BMS integration architecture. These are possible engineering methods, not standard functions guaranteed on every compact ATS.\r\n    <\/figcaption>\r\n  <\/figure>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"how-this-guide-applies-to-a-compact-2p-or-4p-leeyee-ats\"><\/span>How This Guide Applies to a Compact 2P or 4P LEEYEE ATS<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      A compact ATS and a BMS communication system solve two different parts of the project. The ATS performs the source-transfer function. The BMS, when required, supervises selected operating information through interfaces provided by the ATS\/controller.\r\n    <\/p>\r\n\r\n    <p>\r\n      The compact LEEYEE product format uses a local front operating interface with automatic\/manual operation and local source or load status indication. These visible local functions should not be confused with an external BMS interface.\r\n    <\/p>\r\n\r\n    <div class=\"ly-table-wrap\">\r\n      <table aria-label=\"LEEYEE compact ATS and BMS project boundary\">\r\n        <thead>\r\n          <tr>\r\n            <th>What the Project Needs<\/th>\r\n            <th>How to Treat the Compact ATS<\/th>\r\n            <th>Next Confirmation<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"What the Project Needs\">Automatic transfer between two sources<\/td>\r\n            <td data-label=\"How to Treat the Compact ATS\">Core ATS function<\/td>\r\n            <td data-label=\"Next Confirmation\">Current, voltage, 2P\/4P and electrical architecture<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"What the Project Needs\">Local Auto \/ Manual operation<\/td>\r\n            <td data-label=\"How to Treat the Compact ATS\">Local operating function<\/td>\r\n            <td data-label=\"Next Confirmation\">Confirm selected model specification<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"What the Project Needs\">BMS reads source or switch status<\/td>\r\n            <td data-label=\"How to Treat the Compact ATS\">Not assumed from the front panel<\/td>\r\n            <td data-label=\"Next Confirmation\">Confirm dedicated status outputs<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"What the Project Needs\">RS485 \/ Modbus monitoring<\/td>\r\n            <td data-label=\"How to Treat the Compact ATS\">Project-specific requirement<\/td>\r\n            <td data-label=\"Next Confirmation\">Confirm controller and communication documents<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"What the Project Needs\">BACnet or BMS network integration<\/td>\r\n            <td data-label=\"How to Treat the Compact ATS\">Project-specific integration<\/td>\r\n            <td data-label=\"Next Confirmation\">Confirm native interface or gateway architecture<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <div class=\"ly-warning\">\r\n      <span class=\"ly-note-title\">Do not infer communication capability from appearance<\/span>\r\n      Auto\/Manual controls, source indicators and transfer-position indications on the front of an ATS do not by themselves prove that the same information is available as external dry-contact outputs or Modbus registers.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"why-does-a-commercial-building-bms-need-ats-status\"><\/span>Why Does a Commercial Building BMS Need ATS Status?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      A building management system gives operators central visibility of important equipment conditions. For an ATS, the useful question is usually: <strong>Which transfer-system conditions does the operator need to see remotely?<\/strong>\r\n    <\/p>\r\n\r\n    <p>\r\n      On suitably equipped controllers, documented information may include source availability, switch position, operating mode, alarm status or transfer-related information.<a class=\"ly-ref\" href=\"#ref-4\">[4]<\/a><a class=\"ly-ref\" href=\"#ref-5\">[5]<\/a> These manufacturer examples show what is possible on particular controllers. They do not prove that the same points are available on every compact ATS.\r\n    <\/p>\r\n\r\n    <div class=\"ly-table-wrap\">\r\n      <table aria-label=\"Commercial building ATS BMS project examples\">\r\n        <thead>\r\n          <tr>\r\n            <th>Application<\/th>\r\n            <th>Possible Monitoring Need<\/th>\r\n            <th>ATS Selection Meaning<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"Application\">Small commercial distribution board<\/td>\r\n            <td data-label=\"Possible Monitoring Need\">Source and ATS-position status<\/td>\r\n            <td data-label=\"ATS Selection Meaning\">Confirm whether external status outputs are required<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Application\">Generator-backed auxiliary panel<\/td>\r\n            <td data-label=\"Possible Monitoring Need\">Normal source, emergency source and transfer status<\/td>\r\n            <td data-label=\"ATS Selection Meaning\">Confirm source-status and position feedback separately<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Application\">OEM electrical control cabinet<\/td>\r\n            <td data-label=\"Possible Monitoring Need\">ATS alarm or position sent to PLC\/BMS<\/td>\r\n            <td data-label=\"ATS Selection Meaning\">Define I\/O requirement before model approval<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Application\">Building-wide BMS project<\/td>\r\n            <td data-label=\"Possible Monitoring Need\">Multiple ATS points over a communication network<\/td>\r\n            <td data-label=\"ATS Selection Meaning\">Controller\/interface requirement becomes critical<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <div class=\"ly-engineering\">\r\n      <span class=\"ly-note-title\">High-criticality projects need separate engineering review<\/span>\r\n      Hospitals, data centers and other high-criticality power systems may have additional requirements for transfer performance, system architecture, short-circuit coordination, maintenance strategy, redundancy, bypass arrangements, controller functionality and compliance. Do not assume that a compact ATS is suitable merely because the project uses automatic transfer.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"what-ats-points-should-the-bms-monitor\"><\/span>What ATS Points Should the BMS Monitor?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      Build the point list around the facility's actual operating needs. Then match each requested point to a real output, terminal or documented communication value.\r\n    <\/p>\r\n\r\n    <div class=\"ly-table-wrap\">\r\n      <table aria-label=\"Example ATS BMS point list\">\r\n        <thead>\r\n          <tr>\r\n            <th>Example BMS Point<\/th>\r\n            <th>What It Means<\/th>\r\n            <th>Possible Signal Method<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"Example BMS Point\">Normal source available<\/td>\r\n            <td data-label=\"What It Means\">Source 1 satisfies the controller's source-available logic<\/td>\r\n            <td data-label=\"Possible Signal Method\">Contact or communication<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Example BMS Point\">Emergency source available<\/td>\r\n            <td data-label=\"What It Means\">Source 2 satisfies the controller's source-available logic<\/td>\r\n            <td data-label=\"Possible Signal Method\">Contact or communication<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Example BMS Point\">Load on normal source<\/td>\r\n            <td data-label=\"What It Means\">Transfer position indicates connection to Source 1<\/td>\r\n            <td data-label=\"Possible Signal Method\">Auxiliary contact or communication<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Example BMS Point\">Load on emergency source<\/td>\r\n            <td data-label=\"What It Means\">Transfer position indicates connection to Source 2<\/td>\r\n            <td data-label=\"Possible Signal Method\">Auxiliary contact or communication<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Example BMS Point\">Automatic \/ non-automatic mode<\/td>\r\n            <td data-label=\"What It Means\">Operating mode of the controller<\/td>\r\n            <td data-label=\"Possible Signal Method\">Controller-dependent<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Example BMS Point\">Common alarm<\/td>\r\n            <td data-label=\"What It Means\">A defined ATS\/controller alarm condition is active<\/td>\r\n            <td data-label=\"Possible Signal Method\">Alarm contact or communication<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Example BMS Point\">Transfer \/ event information<\/td>\r\n            <td data-label=\"What It Means\">Transfer state, event or cause information if documented<\/td>\r\n            <td data-label=\"Possible Signal Method\">Communication-dependent<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p class=\"ly-table-note\">\r\n      This is an example engineering point list. Eaton and Socomec documentation demonstrate comparable source, operating-mode, switch-position and alarm information on specific controller families.<a class=\"ly-ref\" href=\"#ref-4\">[4]<\/a><a class=\"ly-ref\" href=\"#ref-5\">[5]<\/a>\r\n    <\/p>\r\n\r\n    <div class=\"ly-note\">\r\n      <span class=\"ly-note-title\">Buyer meaning<\/span>\r\n      For a LEEYEE compact ATS project, send the required BMS point list before final model confirmation. Each point should be marked as available, unavailable or requiring a different controller\/interface solution.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"what-is-a-dry-contact-in-ats-bms-integration\"><\/span>What Is a Dry Contact in ATS BMS Integration?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      A <strong>dry contact<\/strong> is a voltage-free switching contact that changes between open and closed states. A BMS or PLC can monitor that state through a suitable digital input.\r\n    <\/p>\r\n\r\n    <p>\r\n      Dry contacts are useful when the project only needs a small number of simple status points. Typical examples may include source status, ATS position or a common alarm\u2014but only if the selected ATS\/controller actually provides those outputs.\r\n    <\/p>\r\n\r\n    <p>\r\n      Do not assume that the local indicator lamps on a compact ATS automatically have corresponding external dry-contact terminals.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"dry-contact-vs-rs485-modbus-which-method-fits-the-project\"><\/span>Dry Contact vs RS485 \/ Modbus: Which Method Fits the Project?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <div class=\"ly-table-wrap\">\r\n      <table aria-label=\"Dry contact versus RS485 Modbus ATS BMS integration\">\r\n        <thead>\r\n          <tr>\r\n            <th>Decision Factor<\/th>\r\n            <th>Dry Contact<\/th>\r\n            <th>RS485 \/ Modbus<\/th>\r\n          <\/tr>\r\n        <\/thead>\r\n        <tbody>\r\n          <tr>\r\n            <td data-label=\"Decision Factor\">Typical purpose<\/td>\r\n            <td data-label=\"Dry Contact\">Basic binary status<\/td>\r\n            <td data-label=\"RS485 \/ Modbus\">Multiple documented data points<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Decision Factor\">BMS connection<\/td>\r\n            <td data-label=\"Dry Contact\">Digital inputs<\/td>\r\n            <td data-label=\"RS485 \/ Modbus\">Serial communication interface<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Decision Factor\">Data quantity<\/td>\r\n            <td data-label=\"Dry Contact\">Limited by physical outputs<\/td>\r\n            <td data-label=\"RS485 \/ Modbus\">Dependent on controller register map<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Decision Factor\">Register map<\/td>\r\n            <td data-label=\"Dry Contact\">Not required<\/td>\r\n            <td data-label=\"RS485 \/ Modbus\">Required<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Decision Factor\">Commissioning<\/td>\r\n            <td data-label=\"Dry Contact\">Verify contact state and NO\/NC logic<\/td>\r\n            <td data-label=\"RS485 \/ Modbus\">Verify address, serial settings and register mapping<\/td>\r\n          <\/tr>\r\n          <tr>\r\n            <td data-label=\"Decision Factor\">Compact LEEYEE ATS<\/td>\r\n            <td data-label=\"Dry Contact\">Confirm output availability before order<\/td>\r\n            <td data-label=\"RS485 \/ Modbus\">Do not assume standard support<\/td>\r\n          <\/tr>\r\n        <\/tbody>\r\n      <\/table>\r\n    <\/div>\r\n\r\n    <p>\r\n      <strong>RS485 is not the same thing as Modbus.<\/strong> Modbus is an application-layer messaging protocol, while serial implementations use a separate serial-line specification.<a class=\"ly-ref\" href=\"#ref-2\">[2]<\/a>\r\n    <\/p>\r\n\r\n    <p>\r\n      Therefore, the presence of an RS485 terminal or connector alone would not prove that a controller supports the Modbus data required by the project. The communication protocol and register map must be verified.\r\n    <\/p>\r\n\r\n    <figure class=\"ly-visual\">\r\n      <img loading=\"lazy\"\r\n        src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/09\/ats-dry-contact-vs-modbus-bms.webp\"\r\n        alt=\"Comparison of dry contact and RS485 Modbus methods for ATS BMS integration\"\r\n        width=\"1448\"\r\n        height=\"1086\"\r\n        loading=\"lazy\"\r\n        decoding=\"async\">\r\n      <figcaption>\r\n        Dry contacts suit a limited number of binary status points. RS485\/Modbus can provide more data only when the selected controller explicitly supports the protocol and supplies the required communication documentation.\r\n      <\/figcaption>\r\n    <\/figure>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"how-to-build-an-ats-bms-point-list\"><\/span>How to Build an ATS BMS Point List<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      The best sequence is to start with what the BMS needs to know, then work backward to the ATS\/controller.\r\n    <\/p>\r\n\r\n    <ol class=\"ly-steps\">\r\n      <li>\r\n        <h3>Define the Required BMS Information<\/h3>\r\n        <p>\r\n          Identify the real operating need: source availability, transfer position, alarm, operating mode or another specific status.\r\n        <\/p>\r\n      <\/li>\r\n\r\n      <li>\r\n        <h3>Create a Clear Point Name<\/h3>\r\n        <p>\r\n          Use names such as \u201cNormal Source Available,\u201d \u201cEmergency Source Available,\u201d \u201cLoad on Emergency\u201d or \u201cATS Common Alarm.\u201d\r\n        <\/p>\r\n      <\/li>\r\n\r\n      <li>\r\n        <h3>Match the Point to a Real ATS Output<\/h3>\r\n        <p>\r\n          Identify the terminal, contact, controller output or communication register that provides the point. If no documentation supports it, do not assume it is available.\r\n        <\/p>\r\n      <\/li>\r\n\r\n      <li>\r\n        <h3>Select the Interface<\/h3>\r\n        <p>\r\n          Choose hardwired contacts, documented RS485\/Modbus communication or another approved integration architecture according to the actual product capability.\r\n        <\/p>\r\n      <\/li>\r\n\r\n      <li>\r\n        <h3>Document the BMS Mapping<\/h3>\r\n        <p>\r\n          Record point name, signal type, NO\/NC logic where relevant, terminal or register reference, alarm meaning and any configuration requirement.\r\n        <\/p>\r\n      <\/li>\r\n\r\n      <li>\r\n        <h3>Verify During Commissioning<\/h3>\r\n        <p>\r\n          Check that BMS indications correspond to the actual source condition, switch position and alarm state. Communication points must also match the final controller configuration.\r\n        <\/p>\r\n      <\/li>\r\n    <\/ol>\r\n\r\n    <figure class=\"ly-visual\">\r\n      <img loading=\"lazy\"\r\n        src=\"https:\/\/www.cnspd.com\/wp-content\/uploads\/2026\/09\/ats-bms-point-list-planning-flow.webp\"\r\n        alt=\"ATS BMS point list planning flow from monitoring requirement to commissioning verification\"\r\n        width=\"1448\"\r\n        height=\"1086\"\r\n        loading=\"lazy\"\r\n        decoding=\"async\">\r\n      <figcaption>\r\n        Define the required BMS point first. Then confirm whether the selected ATS\/controller can actually provide that point before model approval.\r\n      <\/figcaption>\r\n    <\/figure>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"monitoring-an-ats-is-not-the-same-as-controlling-it\"><\/span>Monitoring an ATS Is Not the Same as Controlling It<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <div class=\"ly-two-col\">\r\n      <div class=\"ly-mini-panel\">\r\n        <h3>Monitoring<\/h3>\r\n        <p><strong>Typical direction:<\/strong> ATS \u2192 BMS<\/p>\r\n        <ul>\r\n          <li>Source status<\/li>\r\n          <li>Switch position<\/li>\r\n          <li>Operating mode<\/li>\r\n          <li>Alarm indication<\/li>\r\n          <li>Event information if supported<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n\r\n      <div class=\"ly-mini-panel\">\r\n        <h3>Control<\/h3>\r\n        <p><strong>Typical direction:<\/strong> BMS \u2192 ATS<\/p>\r\n        <ul>\r\n          <li>Transfer command<\/li>\r\n          <li>Retransfer command<\/li>\r\n          <li>Test command<\/li>\r\n          <li>Mode-related command<\/li>\r\n          <li>Other documented remote functions<\/li>\r\n        <\/ul>\r\n      <\/div>\r\n    <\/div>\r\n\r\n    <p>\r\n      Commercial ATS controller documentation shows that some advanced controllers provide both status registers and selected control functions.<a class=\"ly-ref\" href=\"#ref-4\">[4]<\/a><a class=\"ly-ref\" href=\"#ref-5\">[5]<\/a> This does not mean that those functions exist on every compact ATS.\r\n    <\/p>\r\n\r\n    <div class=\"ly-warning\">\r\n      <span class=\"ly-note-title\">Control boundary for compact ATS projects<\/span>\r\n      Do not specify BMS remote transfer or test control for a standard compact LEEYEE ATS unless the selected controller and project documentation explicitly support it. Monitoring and control should be treated as separate requirements.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"what-if-the-building-bms-uses-bacnet\"><\/span>What If the Building BMS Uses BACnet?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      BACnet is defined by ANSI\/ASHRAE Standard 135 as a data communication protocol for building automation and control networks.<a class=\"ly-ref\" href=\"#ref-3\">[3]<\/a>\r\n    <\/p>\r\n\r\n    <p>\r\n      If a project uses BACnet, the ATS does not necessarily need native BACnet support. On systems that provide another documented protocol, a suitable gateway may sometimes be used. Eaton, for example, documents ATS communication architectures involving Modbus and building-management gateways.<a class=\"ly-ref\" href=\"#ref-4\">[4]<\/a>\r\n    <\/p>\r\n\r\n    <div class=\"ly-note\">\r\n      <span class=\"ly-note-title\">LEEYEE project meaning<\/span>\r\n      Do not assume that the standard compact ATS shown in the LEEYEE range is a native BACnet device. If BACnet integration is required, send the BMS architecture and point list before confirming the ATS\/controller solution.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"do-not-confuse-ats-information-with-generator-information\"><\/span>Do Not Confuse ATS Information with Generator Information<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      In a generator-backed system, the ATS and generator controller are separate information sources. Depending on the controller, an ATS may provide emergency-source status or generator-start-related information.<a class=\"ly-ref\" href=\"#ref-4\">[4]<\/a><a class=\"ly-ref\" href=\"#ref-5\">[5]<\/a>\r\n    <\/p>\r\n\r\n    <p>\r\n      Detailed generator information\u2014such as engine conditions, fuel information, battery data or engine-controller faults\u2014should not automatically be treated as ATS data. If these points are required, identify whether they come from the generator controller, ATS controller or another gateway.\r\n    <\/p>\r\n\r\n    <div class=\"ly-engineering\">\r\n      <span class=\"ly-note-title\">Engineering meaning<\/span>\r\n      \u201cEmergency source available\u201d and \u201cgenerator telemetry\u201d are different requirements. Define them separately in the BMS point schedule.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"how-iec-60947-6-1-relates-to-the-project\"><\/span>How IEC 60947-6-1 Relates to the Project<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      IEC 60947-6-1:2026 applies to transfer switching equipment used to transfer a load between power-supply sources and includes provisions covering automatic transfer switching equipment and controllers.<a class=\"ly-ref\" href=\"#ref-1\">[1]<\/a>\r\n    <\/p>\r\n\r\n    <p>\r\n      Compliance with an ATS product standard does not prove that a particular dry contact, Modbus register, BACnet interface or remote-control command is provided. These functions remain model- and controller-specific project items.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"common-ats-bms-integration-mistakes\"><\/span>Common ATS BMS Integration Mistakes<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <h3>Assuming the compact ATS front panel proves BMS capability<\/h3>\r\n    <p>\r\n      Local Auto\/Manual controls and status lamps show local operating information. They do not prove the existence of corresponding remote contacts or communication registers.\r\n    <\/p>\r\n\r\n    <h3>Approving an ATS because a quotation says \u201cBMS compatible\u201d<\/h3>\r\n    <p>\r\n      The quotation should identify the actual BMS points, terminals or communication protocol. A general phrase is not enough for engineering approval.\r\n    <\/p>\r\n\r\n    <h3>Assuming RS485 automatically means Modbus<\/h3>\r\n    <p>\r\n      Confirm the actual protocol and register documentation rather than relying only on the physical interface.<a class=\"ly-ref\" href=\"#ref-2\">[2]<\/a>\r\n    <\/p>\r\n\r\n    <h3>Creating the BMS point list after purchasing the ATS<\/h3>\r\n    <p>\r\n      Define the required monitoring points before the ATS\/controller is finalized. Otherwise, the project may discover too late that an output or communication function is unavailable.\r\n    <\/p>\r\n\r\n    <h3>Using a compact ATS where the project requires a more advanced control architecture<\/h3>\r\n    <p>\r\n      If the project requires extensive network monitoring, remote commands, sophisticated event data, bypass functions or high-criticality system features, confirm whether the compact ATS architecture is appropriate before specifying it.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section class=\"ly-checklist\">\r\n    <h2><span class=\"ez-toc-section\" id=\"before-ordering-a-leeyee-ats-for-a-bms-project\"><\/span>Before Ordering a LEEYEE ATS for a BMS Project<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      Send the project requirements before the ATS model is finalized. This allows the basic compact ATS requirement to be separated from any additional controller or interface requirement.\r\n    <\/p>\r\n\r\n    <ul class=\"ly-check-grid\">\r\n      <li>Rated current<\/li>\r\n      <li>2P or 4P requirement<\/li>\r\n      <li>System voltage and frequency<\/li>\r\n      <li>Normal source type<\/li>\r\n      <li>Emergency source type<\/li>\r\n      <li>Generator-backed or dual-utility arrangement<\/li>\r\n      <li>Required BMS point list<\/li>\r\n      <li>Required dry-contact outputs<\/li>\r\n      <li>Required communication interface<\/li>\r\n      <li>Required protocol<\/li>\r\n      <li>RS485 \/ Ethernet requirement<\/li>\r\n      <li>Modbus RTU \/ TCP requirement<\/li>\r\n      <li>BACnet \/ gateway requirement<\/li>\r\n      <li>Monitoring-only or remote-control requirement<\/li>\r\n      <li>Single-line diagram<\/li>\r\n      <li>BMS point schedule<\/li>\r\n    <\/ul>\r\n\r\n    <div class=\"ly-key-line\">\r\n      If the project only needs automatic source transfer, a compact ATS may be sufficient after normal electrical selection. If the project also needs BMS communication, treat the interface as a separate requirement and confirm it before ordering.\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-cta\">\r\n    <h2><span class=\"ez-toc-section\" id=\"have-a-bms-point-list-for-your-ats-project\"><\/span>Have a BMS Point List for Your ATS Project?<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <p>\r\n      Send the required monitoring points, ATS current and pole configuration, source arrangement and communication requirements. LEEYEE can review whether the compact ATS requirement and the requested BMS interface are technically aligned before model confirmation.\r\n    <\/p>\r\n\r\n    <button\r\n      type=\"button\"\r\n      class=\"leeyee-about-btn-light leeyee-site-popup-btn\"\r\n      aria-label=\"Send Your ATS BMS Point List\">\r\n      <span class=\"w-btn-label\">Send Your ATS BMS Point List<\/span>\r\n    <\/button>\r\n  <\/section>\r\n\r\n  <section>\r\n    <h2><span class=\"ez-toc-section\" id=\"ats-bms-integration-faq\"><\/span>ATS BMS Integration FAQ<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <div class=\"ly-faq\">\r\n\r\n      <details>\r\n        <summary>Can a compact 2P or 4P ATS be connected to a BMS?<\/summary>\r\n        <div class=\"ly-faq-answer\">\r\n          <p>\r\n            Potentially, but only when the selected ATS\/controller provides the required external outputs or communication interface. Compact size alone does not confirm BMS capability.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Does the standard LEEYEE compact ATS include Modbus or BACnet?<\/summary>\r\n        <div class=\"ly-faq-answer\">\r\n          <p>\r\n            Do not assume that Modbus, BACnet or another BMS communication interface is included as a standard function. If the project requires communication, confirm the exact controller\/interface specification before model approval.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Do the front-panel status lights mean the same signals are available to the BMS?<\/summary>\r\n        <div class=\"ly-faq-answer\">\r\n          <p>\r\n            Not necessarily. A local lamp or indicator confirms local status display only. A BMS requires a separate documented output, contact or communication point.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What ATS signals are normally useful to a BMS?<\/summary>\r\n        <div class=\"ly-faq-answer\">\r\n          <p>\r\n            Typical project requirements may include normal-source availability, emergency-source availability, transfer position, operating mode and alarm status. Actual availability depends on the selected ATS\/controller.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>What is the difference between ATS dry contacts and Modbus?<\/summary>\r\n        <div class=\"ly-faq-answer\">\r\n          <p>\r\n            A dry contact provides a simple open\/closed electrical status for a digital input. Modbus can exchange multiple structured data points when the controller supports the protocol and provides a documented register map.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Is RS485 the same as Modbus?<\/summary>\r\n        <div class=\"ly-faq-answer\">\r\n          <p>\r\n            No. RS485 describes the serial physical interface, while Modbus defines how structured messages are exchanged. The presence of RS485 alone does not confirm Modbus support.<a class=\"ly-ref\" href=\"#ref-2\">[2]<\/a>\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Can a BMS remotely operate a compact ATS?<\/summary>\r\n        <div class=\"ly-faq-answer\">\r\n          <p>\r\n            Only if the selected ATS\/controller explicitly provides and documents a suitable remote-control function. Do not infer remote transfer capability from the presence of Auto\/Manual controls or from a communication port.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n      <details>\r\n        <summary>Does the ATS provide all generator data to the BMS?<\/summary>\r\n        <div class=\"ly-faq-answer\">\r\n          <p>\r\n            No general assumption should be made. Detailed generator telemetry may come directly from the generator controller rather than through the ATS.\r\n          <\/p>\r\n        <\/div>\r\n      <\/details>\r\n\r\n    <\/div>\r\n  <\/section>\r\n\r\n  <section class=\"ly-related\">\r\n    <h2><span class=\"ez-toc-section\" id=\"related-ats-selection-guidance\"><\/span>Related ATS Selection Guidance<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n    <p>\r\n      If you are still confirming the basic transfer-switch architecture before planning BMS integration, see\r\n      <a href=\"https:\/\/www.cnspd.com\/what-is-an-automatic-transfer-switch-how-ats-works-how-to-choose\/\">\r\n        What Is an Automatic Transfer Switch? How ATS Works &amp; How to Choose\r\n      <\/a>.\r\n    <\/p>\r\n  <\/section>\r\n\r\n  <section class=\"ly-references\">\r\n    <h2><span class=\"ez-toc-section\" id=\"references\"><\/span>References<span class=\"ez-toc-section-end\"><\/span><\/h2>\r\n\r\n    <ol>\r\n      <li id=\"ref-1\">\r\n        International Electrotechnical Commission (IEC).\r\n        <em>IEC 60947-6-1:2026 \u2014 Low-voltage switchgear and controlgear \u2014 Part 6-1: Multiple function equipment \u2014 Transfer switching equipment.<\/em>\r\n        <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/90494\" target=\"_blank\" rel=\"noopener noreferrer\">\r\n          Official IEC publication page\r\n        <\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-2\">\r\n        Modbus Organization.\r\n        <em>Modbus Application Protocol Specification<\/em> and\r\n        <em>Modbus Serial Line Protocol and Implementation Guide.<\/em>\r\n        <a href=\"https:\/\/www.modbus.org\/modbus-specifications\" target=\"_blank\" rel=\"noopener noreferrer\">\r\n          Official Modbus specifications\r\n        <\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-3\">\r\n        ASHRAE.\r\n        <em>ANSI\/ASHRAE Standard 135-2024 \u2014 BACnet: A Data Communication Protocol for Building Automation and Control Networks.<\/em>\r\n        <a href=\"https:\/\/www.ashrae.org\/technical-resources\/standards-and-guidelines\/titles-purposes-and-scopes\" target=\"_blank\" rel=\"noopener noreferrer\">\r\n          ASHRAE standards information\r\n        <\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-4\">\r\n        Eaton.\r\n        <em>ATS Controllers and Remote Annunciators Design Guide, DG140004EN.<\/em>\r\n        The guide documents examples of ATS controller communication, Modbus data, gateways and building-management-system connectivity.\r\n        <a href=\"https:\/\/www.eaton.com\/content\/dam\/eaton\/products\/design-guides---consultant-audience\/eaton-ats-controller-design-guide-dg140004en.pdf\" target=\"_blank\" rel=\"noopener noreferrer\">\r\n          Eaton ATS controller design guide\r\n        <\/a>.\r\n      <\/li>\r\n\r\n      <li id=\"ref-5\">\r\n        Socomec.\r\n        <em>ATyS Communication \/ Modbus Tables.<\/em>\r\n        Official controller documentation includes examples of operating mode, switch position, source status, generator-start-relay state, alarm\/fault status and transfer information.\r\n        <a href=\"https:\/\/apac.socomec.com\/sites\/default\/files\/2026-02\/MODBUS-TABLES-ATyS-aM_COMMUNICATION-TABLE_2026-02-12-09-45-14_v120_English_PLURI.html\" target=\"_blank\" rel=\"noopener noreferrer\">\r\n          Socomec ATyS communication table\r\n        <\/a>.\r\n      <\/li>\r\n    <\/ol>\r\n  <\/section>\r\n\r\n<\/article>\r\n\r\n<script>\r\ndocument.addEventListener('DOMContentLoaded', function () {\r\n  var aboutPopupButtons = document.querySelectorAll('.leeyee-site-popup-btn');\r\n\r\n  aboutPopupButtons.forEach(function (button) {\r\n    button.addEventListener('click', function () {\r\n      var realPopupTrigger = document.querySelector(\r\n        '.w-popup.ush_popup_1 .w-popup-trigger'\r\n      );\r\n\r\n      if (realPopupTrigger) {\r\n        realPopupTrigger.click();\r\n      } else {\r\n        window.open(\r\n          'https:\/\/www.cnspd.com\/contact\/',\r\n          '_blank',\r\n          'noopener'\r\n        );\r\n      }\r\n    });\r\n  });\r\n});\r\n<\/script>\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t\t\t<\/div>\n\t\t","protected":false},"excerpt":{"rendered":"<p>B2B Engineering &amp; Project Integration GuideATS BMS integration means connecting an automatic transfer switch to a building management system so the BMS can receive documented ATS status, alarm or operating information. The interface must be planned around the actual ATS controller and the project&#8217;s required BMS points. For LEEYEE compact 2P and 4P ATS projects,&#8230;<\/p>","protected":false},"author":18,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[490,1,422],"tags":[],"class_list":["post-31322","post","type-post","status-publish","format-standard","hentry","category-isolator-switching","category-news","category-industry-news"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.3 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>ATS BMS Integration Guide: Dry Contacts, Modbus &amp; Point Lists<\/title>\n<meta name=\"description\" content=\"Learn how to plan ATS BMS integration for compact 2P and 4P transfer switches, including dry contacts, RS485 Modbus, BACnet gateways, BMS point lists and interface confirmation.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/\" \/>\n<meta property=\"og:locale\" content=\"fr_FR\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"ATS BMS Integration Guide: Dry Contacts, Modbus &amp; Point Lists\" \/>\n<meta property=\"og:description\" content=\"Learn how to plan ATS BMS integration for compact 2P and 4P transfer switches, including dry contacts, RS485 Modbus, BACnet gateways, BMS point lists and interface confirmation.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.cnspd.com\/fr\/ats-bms-integration-guide\/\" \/>\n<meta property=\"og:site_name\" content=\"Surge Protector, Surge Arrestor, Isolating Switch - 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