{"id":20781,"date":"2026-11-04T10:13:57","date_gmt":"2026-11-04T02:13:57","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/dali-bus-power-current-budget\/"},"modified":"2026-11-04T10:13:57","modified_gmt":"2026-11-04T02:13:57","slug":"dali-bus-power-current-budget","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/bn\/news\/dali-bus-power-current-budget\/","title":{"rendered":"DALI-2 Bus Power Budget: Check Device Consumption Before Commissioning"},"content":{"rendered":"<div class=\"weho-geo-content\">\n<p><strong>Direct answer:<\/strong> Budget a DALI bus using the connected devices\u2019 specified bus consumption and the bus power supply\u2019s guaranteed current. Then separately check the maximum total current of every enabled bus supply against the applicable system limit. A sufficient number of addresses or a powerful LED power supply does not prove that the control bus has enough current.<\/p>\n<figure><a href=\"https:\/\/www.wehopower.com\/bn\/product\/hlg-200-200w-12v-24v-36v-48v-waterproof-ip67-led-power-supply-with-pfc\/\" aria-label=\"View WEHO HLG-200-12 product details\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/product-scene-scene-2026-10-28-geo11-12-v2-d3b614447e43.png\" width=\"1672\" height=\"941\" alt=\"DALI-2 Bus Power Budget: Check Device Consumption Before Commissioning  title=\" dali-2 bus power budget: check device consumption before commissioning title =\"\"><\/a><figcaption>AI-assisted illustration of a WEHO HLG-200-12 supplying ordinary LED modules in a lighting enclosure. This is the lighting-power side of the application, not a DALI bus power supply or a DALI-2 commissioning result. <a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/product-scene-scene-2026-10-28-geo11-12-v2-d3b614447e43.png\">View full-size illustration<\/a>.<\/figcaption><\/figure>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_86 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u09b8\u09c2\u099a\u09bf\u09aa\u09a4\u09cd\u09b0<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">\u099f\u0997\u09b2 \u0995\u09b0\u09c1\u09a8<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewbox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewbox=\"0 0 24 24\" version=\"1.2\" baseprofile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/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=\"https:\/\/www.wehopower.com\/bn\/news\/dali-bus-power-current-budget\/#What_belongs_in_a_DALI_bus_budget\" >What belongs in a DALI bus budget?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.wehopower.com\/bn\/news\/dali-bus-power-current-budget\/#Worked_example_calculate_consumption_and_supply_separately\" >Worked example: calculate consumption and supply separately<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.wehopower.com\/bn\/news\/dali-bus-power-current-budget\/#Do_the_addresses_guarantee_a_power_budget\" >Do the addresses guarantee a power budget?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/bn\/news\/dali-bus-power-current-budget\/#What_should_an_integrator_request_before_commissioning\" >What should an integrator request before commissioning?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/bn\/news\/dali-bus-power-current-budget\/#Product_identity_and_project_support\" >Product identity and project support<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/bn\/news\/dali-bus-power-current-budget\/#Frequently_asked_questions\" >Frequently asked questions<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/bn\/news\/dali-bus-power-current-budget\/#Can_I_add_the_bus_currents_of_all_integrated_supplies\" >Can I add the bus currents of all integrated supplies?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/bn\/news\/dali-bus-power-current-budget\/#Can_I_use_LED_wattage_to_estimate_control-bus_current\" >Can I use LED wattage to estimate control-bus current?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"What_belongs_in_a_DALI_bus_budget\"><\/span>What belongs in a DALI bus budget?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u09a6 <a href=\"https:\/\/www.dali-alliance.org\/data\/downloadables\/3\/4\/8\/dali-quick-start-guide_public-v1_1_april-2023.pdf\" target=\"_blank\" rel=\"noopener\">DALI Alliance Quick Start Guide<\/a> separates the bus supply from control gear, application controllers and input devices. Some products include an integrated bus supply; others draw from the bus. Record the exact role and the manufacturer&#8217;s values for every installed device, including controllers and sensors, not just drivers.<\/p>\n<p>The same guide describes a nominally 16 V bus and a maximum supply current of 250 mA. Use the published limits for the actual installation and document versions. A separate LED power output supplies the light source; its power rating is not a DALI bus current rating. Neither an ordinary auxiliary DC supply nor the pictured 12 V HLG unit can be assumed to power or communicate on a DALI bus.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Worked_example_calculate_consumption_and_supply_separately\"><\/span>Worked example: calculate consumption and supply separately<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The following values are invented for arithmetic practice, not specifications for WEHO or any DALI product. Assume one compatible bus supply has a guaranteed 100 mA available and a maximum output of 120 mA; all listed consumption values are worst-case values from a hypothetical common basis.<\/p>\n<div class=\"table-scroll\">\n<table>\n<thead>\n<tr>\n<th>Connected bus load<\/th>\n<th>Quantity \u00d7 assumed current<\/th>\n<th>Budget<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Control gear<\/td>\n<td>20 \u00d7 2 mA<\/td>\n<td>40 mA<\/td>\n<\/tr>\n<tr>\n<td>Input devices<\/td>\n<td>4 \u00d7 6 mA<\/td>\n<td>24 mA<\/td>\n<\/tr>\n<tr>\n<td>Application controller<\/td>\n<td>1 \u00d7 12 mA<\/td>\n<td>12 mA<\/td>\n<\/tr>\n<tr>\n<td><strong>Total consumption<\/strong><\/td>\n<td>40 + 24 + 12<\/td>\n<td><strong>76 mA<\/strong><\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>On those assumptions, the guaranteed-current margin is 100 \u2212 76 = <strong>24 mA<\/strong>. This is a screening result, not an installation approval: use the manufacturer&#8217;s actual current definitions and verify the full device list and wiring.<\/p>\n<figure><a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/technical-1.svg\"><picture><source media=\"(max-width: 560px)\" srcset=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/technical-mobile-1.svg\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/technical-1.svg\" alt=\"DALI-2 Bus Power Budget: Check Device Consumption Before Commissioning  title=\" width=\"1200\" height=\"610\" dali-2 bus power budget: check device consumption before commissioning title=\"\"><\/picture><\/a><figcaption>Two independent bus-current checks; numbers are illustrative. <a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/technical-1.svg\">View full-size diagram<\/a>.<\/figcaption><\/figure>\n<p>Now suppose an additional device has a separately enabled integrated supply with a maximum of 150 mA. If both were allowed to operate together, the maximum would be 120 + 150 = <strong>270 mA<\/strong>, exceeding the guide&#8217;s 250 mA limit. Do not connect or enable supplies together simply because their sum is lower than the limit: first confirm the combination, any integrated-supply settings and configuration instructions with the manufacturers.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Do_the_addresses_guarantee_a_power_budget\"><\/span>Do the addresses guarantee a power budget?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>No. Address capacity and available current answer different questions. The Alliance&#8217;s <a href=\"https:\/\/www.dali-alliance.org\/dali\/systems.html\" target=\"_blank\" rel=\"noopener\">system overview<\/a> describes individually addressable control gear and control devices. A design can fit within address counts yet exceed a current budget, or have electrical margin but require another solution for its address allocation. An address plan does not replace a current schedule.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"What_should_an_integrator_request_before_commissioning\"><\/span>What should an integrator request before commissioning?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol>\n<li>List the exact part number and quantity of each bus participant, including integrated controllers and sensors.<\/li>\n<li>Request maximum bus-consumption values and the guaranteed and maximum supply-current values under the applicable conditions.<\/li>\n<li>Identify each enabled supply, whether it is standalone or integrated, and obtain instructions for any permissible combination or disabling setting.<\/li>\n<li>Check the cable topology, length, voltage drop and commissioning procedure against the specific device documentation and project requirements.<\/li>\n<li>Record the arithmetic, installed settings, later additions and measured commissioning results; an available-current calculation alone is not an interoperability test.<\/li>\n<\/ol>\n<h2><span class=\"ez-toc-section\" id=\"Product_identity_and_project_support\"><\/span>Product identity and project support<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u09a6 <a href=\"https:\/\/www.wehopower.com\/bn\/product\/hlg-200-200w-12v-24v-36v-48v-waterproof-ip67-led-power-supply-with-pfc\/\">WEHO HLG-200 series product page<\/a> identifies the HLG-200-12 pictured here as an LED power-supply model. Obtain the exact lighting-load and control-interface documents before selecting a complete system; the product image is not evidence of a DALI interface, certification or bus supply.<\/p>\n<figure><a href=\"https:\/\/www.wehopower.com\/bn\/product\/hlg-200-200w-12v-24v-36v-48v-waterproof-ip67-led-power-supply-with-pfc\/\"><img decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/product-original.jpg\" alt=\"DALI-2 Bus Power Budget: Check Device Consumption Before Commissioning  title=\" width=\"1000\" height=\"1000\" dali-2 bus power budget: check device consumption before commissioning title=\"\"><\/a><figcaption>Original HLG-200-12 product photograph; use the precise model documents to verify its actual functions.<\/figcaption><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Frequently_asked_questions\"><\/span>Frequently asked questions<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_add_the_bus_currents_of_all_integrated_supplies\"><\/span>Can I add the bus currents of all integrated supplies?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Include every enabled supply in the maximum-current check, but confirm the manufacturer&#8217;s instructions permit the particular combination. Do not assume supplies can be paralleled or disabled.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_I_use_LED_wattage_to_estimate_control-bus_current\"><\/span>Can I use LED wattage to estimate control-bus current?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. Request the bus-consumption figure for the actual control device. LED load power and DALI control-bus current describe different circuits.<\/p>\n<p class=\"article-cta\">Planning a lighting project? Send WEHO the exact lighting load, intended control method and required documents. Ask for model-specific information and have the DALI integrator verify the bus budget and compatibility. <a href=\"https:\/\/www.wehopower.com\/bn\/contact\/\">WEHO \u098f\u09b0 \u09b8\u09be\u09a5\u09c7 \u09af\u09cb\u0997\u09be\u09af\u09cb\u0997 \u0995\u09b0\u09c1\u09a8<\/a>.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Calculate DALI bus consumption, guaranteed supply current and the maximum supply limit before commissioning a lighting control system.<\/p>","protected":false},"author":2,"featured_media":20749,"parent":0,"menu_order":34,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[284],"class_list":["post-20781","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-product-articles","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/news\/20781","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/comments?post=20781"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/news\/20781\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/media\/20749"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/media?parent=20781"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/news_category?post=20781"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}