{"id":20623,"date":"2026-11-02T10:07:37","date_gmt":"2026-11-02T02:07:37","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/adjustable-switching-power-supply-oem-voltage-setpoint\/"},"modified":"2026-11-02T10:07:37","modified_gmt":"2026-11-02T02:07:37","slug":"adjustable-switching-power-supply-oem-voltage-setpoint","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/el\/news\/adjustable-switching-power-supply-oem-voltage-setpoint\/","title":{"rendered":"Adjustable Switching Power Supply: Release a Controlled Voltage Setpoint"},"content":{"rendered":"<div class=\"weho-blog-content\">\n<p class=\"lead\"><strong>An adjustable switching power supply needs a released voltage setpoint, an allowed adjustment window and a final check at the loads.<\/strong> Turning the trimmer until one device works is not a repeatable commissioning method. The same change can overvoltage a nearby branch, alter available current at a power limit, or hide a distribution problem.<\/p>\n<details class=\"article-toc\" open>\n<summary>On this page<\/summary>\n<ol class=\"toc-list\">\n<li><a href=\"#identify-the-adjustment\">Identify the adjustment on the exact model<\/a><\/li>\n<li><a href=\"#build-the-window\">Build the system&#x27;s allowed setting window<\/a><\/li>\n<li><a href=\"#check-the-power\">Check the power envelope after adjustment<\/a><\/li>\n<li><a href=\"#write-the-instruction\">Write an instruction production can repeat<\/a><\/li>\n<li><a href=\"#release-and-service\">Release the setting with the equipment configuration<\/a><\/li>\n<\/ol>\n<\/details>\n<p>This guide uses a 48 V calculation to help OEM engineers define a factory adjustment instruction. It separates a local output trimmer from remote sensing and programmable control, then turns the chosen setting into a record that production and service can reproduce.<\/p>\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\">\u03a0\u03af\u03bd\u03b1\u03ba\u03b1\u03c2 \u03c0\u03b5\u03c1\u03b9\u03b5\u03c7\u03bf\u03bc\u03ad\u03bd\u03c9\u03bd<\/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;\">\u039c\u03c0\u03b1\u03c1\u03ad\u03c4\u03b1<\/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\/el\/news\/adjustable-switching-power-supply-oem-voltage-setpoint\/#Identify_the_adjustment_on_the_exact_model\" >Identify the adjustment on the exact model<\/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\/el\/news\/adjustable-switching-power-supply-oem-voltage-setpoint\/#Build_the_systems_allowed_setting_window\" >Build the system&#8217;s allowed setting window<\/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\/el\/news\/adjustable-switching-power-supply-oem-voltage-setpoint\/#Check_the_power_envelope_after_adjustment\" >Check the power envelope after adjustment<\/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\/el\/news\/adjustable-switching-power-supply-oem-voltage-setpoint\/#Write_an_instruction_production_can_repeat\" >Write an instruction production can repeat<\/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\/el\/news\/adjustable-switching-power-supply-oem-voltage-setpoint\/#Release_the_setting_with_the_equipment_configuration\" >Release the setting with the equipment configuration<\/a><\/li><\/ul><\/nav><\/div>\n<h2 id=\"identify-the-adjustment\"><span class=\"ez-toc-section\" id=\"Identify_the_adjustment_on_the_exact_model\"><\/span>Identify the adjustment on the exact model<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u039f <a href=\"https:\/\/www.wehopower.com\/el\/product\/100w-ac-to-dc-single-output-switching-power-supply\/\">WEHO LRS-100-48 switching power supply<\/a> is a useful document-review candidate: published LRS-100 sheets include a DC-voltage adjustment field and an SVR1 location. The documents confirm adjustment exists; they do not make the supply a programmable laboratory instrument or establish a remote-sense interface.<\/p>\n<figure class=\"product-reference product-scene\" id=\"figure-lrs100-adjustment\"><a class=\"product-image scene-product-image\" href=\"https:\/\/www.wehopower.com\/el\/product\/100w-ac-to-dc-single-output-switching-power-supply\/\" aria-label=\"LRS-100-48 product details\"><img loading=\"lazy\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/76-lrs100-adjustment-scene-lrs-edge-v9.jpg\" width=\"1254\" height=\"1254\" alt=\"Adjustable Switching Power Supply: Release a Controlled Voltage Setpoint  title=\" decoding=\"async\" adjustable switching power supply: release controlled voltage setpoint title =\"\"><\/a><figcaption>Application illustration; exact original product photograph retained, environment AI-assisted, not a customer installation or test. LRS-100-48 is shown as an unpowered sample for controlled setpoint review. No adjustment, energized terminals or measurement result is depicted.<\/figcaption><div class=\"image-actions\"><a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/76-lrs100-adjustment-original.jpg\">View unchanged original product photograph<\/a><a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/76-lrs100-adjustment-scene-lrs-edge-v9.jpg\">View full-size application illustration<\/a><a href=\"https:\/\/www.wehopower.com\/el\/product\/100w-ac-to-dc-single-output-switching-power-supply\/\">LRS-100-48 product details<\/a><a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/76-lrs100-adjustment-scene-lrs-edge-v9-layers.svg\">Inspect illustration layers (SVG)<\/a><\/div>\n<\/figure>\n<p>\u039f <a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2021\/10\/LRS-100-1.pdf\">LRS-100-1 sheet<\/a> lists \u00b110% DC adjustment for its 48 V row; the <a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2021\/10\/LRS-100.pdf\">separate LRS-100 sheet<\/a> gives 43.2\u201352.8 V, the same interval. These archive documents corroborate adjustment capability. However, the photographed specimen is labeled 48 V, 2.08 A, while the older tables list 2.3 A for that suffix. Do not transfer the older current rating to this specimen. Obtain its applicable voltage\u2013current\u2013power envelope before releasing the setting.<\/p>\n<h2 id=\"build-the-window\"><span class=\"ez-toc-section\" id=\"Build_the_systems_allowed_setting_window\"><\/span>Build the system&#8217;s allowed setting window<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>List each receiver&#8217;s permitted voltage at its own input terminals. Include source variation, outward-and-return distribution loss and measurement uncertainty. Separate steady-state limits from startup and load-change limits; a successful meter reading addresses only the condition actually measured.<\/p>\n<p>For a simple calculation, assume the released source voltage can be held within \u00b10.20 V of a chosen setting S over the stated conditions. These are hypothetical bounds, not LRS-100 ratings. Load A requires at least 46.0 V and can lose 2.0 V in its distribution path. The low-side condition is S \u2212 0.20 \u2212 2.0 \u2265 46.0, so S must be at least 48.20 V.<\/p>\n<p>Load B has a permitted maximum of 49.00 V and, for the limiting high-voltage case, negligible distribution loss. Its condition is S + 0.20 \u2264 49.00, so S must not exceed 48.80 V. The shared setting window is therefore 48.20\u201348.80 V. Choosing 48.50 V gives 46.30 V at A&#8217;s assumed low corner and 48.70 V at B&#8217;s assumed high corner. Those margins still need to meet the project&#8217;s required reserve.<\/p>\n<div class=\"weho-table-wrap\" tabindex=\"0\" role=\"region\" aria-label=\"Scrollable article table\">\n<table>\n<thead>\n<tr>\n<th>Boundary<\/th>\n<th>Example condition<\/th>\n<th>Result for S<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>A minimum voltage<\/td>\n<td>S \u2212 0.20 \u2212 2.0 \u2265 46.0 V<\/td>\n<td>At least 48.20 V<\/td>\n<\/tr>\n<tr>\n<td>B maximum voltage<\/td>\n<td>S + 0.20 \u2264 49.00 V<\/td>\n<td>No more than 48.80 V<\/td>\n<\/tr>\n<tr>\n<td>Shared solution<\/td>\n<td>Intersection of both conditions<\/td>\n<td>48.20\u201348.80 V<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<p>If B&#8217;s maximum were 48.20 V, its upper setting bound would become 48.00 V. The window would be empty. More trimmer adjustment would not solve that distribution design; the rail or harness arrangement would need review.<\/p>\n<h2 id=\"check-the-power\"><span class=\"ez-toc-section\" id=\"Check_the_power_envelope_after_adjustment\"><\/span>Check the power envelope after adjustment<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Keep output current and output power as separate limits. In another calculation example, assume a source has a documented 100 W ceiling and a separate 2.5 A ceiling. At 52 V, the power limit alone gives 100 \u00f7 52 = 1.92 A. It would be wrong to retain 2.5 A merely because the current rating was valid at a lower voltage. This example does not assign either ceiling to LRS-100-48.<\/p>\n<p>Check the actual model&#8217;s stated adjustment conditions, thermal derating and load requirements. Revisit protection coordination and receiver limits where a higher setting changes the fault voltage or branch behavior. Adjustment capability does not imply constant-power regulation throughout the range.<\/p>\n<h2 id=\"write-the-instruction\"><span class=\"ez-toc-section\" id=\"Write_an_instruction_production_can_repeat\"><\/span>Write an instruction production can repeat<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure class=\"article-relation concept-diagram\" id=\"figure-setpoint-release-flow\"><a href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/76-setpoint-release-flow.svg\" aria-label=\"Open full-size A 48 V setting example, released as a record diagram\"><picture><source media=\"(max-width:640px)\" srcset=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/76-setpoint-release-flow-mobile.svg\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/76-setpoint-release-flow.svg\" width=\"1200\" height=\"441\" alt=\"Adjustable Switching Power Supply: Release a Controlled Voltage Setpoint  title=\" adjustable switching power supply: release controlled voltage setpoint title =\"\"><\/picture><\/a><figcaption>Author-created 48 V calculation workflow using assumed load limits. It is not an LRS-100-48 measured performance result or a wiring diagram.<\/figcaption><a class=\"diagram-original\" href=\"https:\/\/www.wehopower.com\/wp-content\/uploads\/2026\/11\/76-setpoint-release-flow.svg\">Open full-size diagram<\/a><\/figure>\n<p>Specify the exact assembly and document revision, the measurement points, input condition, load state, stabilization condition, target and acceptance band. Define who may change the setting and when the complete acceptance check must be repeated. Use the manufacturer&#8217;s permitted adjustment method; do not turn this record into instructions for opening or modifying a supply.<\/p>\n<p>Record the final value together with meter identity, relevant uncertainty and the receiver voltages. A tamper mark or label, where permitted, records configuration intent; it cannot prove that the voltage remained correct after a load, harness or supply change.<\/p>\n<h2 id=\"release-and-service\"><span class=\"ez-toc-section\" id=\"Release_the_setting_with_the_equipment_configuration\"><\/span>Release the setting with the equipment configuration<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Include normal running, minimum demand, maximum demand, startup and the agreed input boundaries in validation. A technician should be able to tell whether a replacement needs the same setpoint or a new engineering review. Keep the accepted supply revision and harness definition attached to that decision.<\/p>\n<p><a href=\"https:\/\/www.wehopower.com\/el\/contact\/\">Send WEHO your required voltage-setting window<\/a> with load limits, distribution losses, input conditions and operating environment. Ask for the applicable LRS-100-48 adjustment data and candidate configuration before specifying the factory setting.<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"<p>Use a 48 V calculation to release a setting from every receiver limit. Match the LRS-100-48 adjustment data to the actual specimen and record the accepted factory configuration.<\/p>","protected":false},"author":2,"featured_media":20562,"parent":0,"menu_order":52,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[284],"class_list":["post-20623","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\/el\/wp-json\/wp\/v2\/news\/20623","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/el\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/el\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/el\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/el\/wp-json\/wp\/v2\/comments?post=20623"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/el\/wp-json\/wp\/v2\/news\/20623\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/el\/wp-json\/wp\/v2\/media\/20562"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/el\/wp-json\/wp\/v2\/media?parent=20623"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/el\/wp-json\/wp\/v2\/news_category?post=20623"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}