{"id":18932,"date":"2026-10-10T17:34:34","date_gmt":"2026-10-10T09:34:34","guid":{"rendered":"https:\/\/www.wehopower.com\/news\/power-supply-vibration-rating-match-the-specimen-fixture-and-operating-criteria\/"},"modified":"2026-10-10T17:34:34","modified_gmt":"2026-10-10T09:34:34","slug":"power-supply-vibration-rating-match-the-specimen-fixture-and-operating-criteria","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/it\/news\/power-supply-vibration-rating-match-the-specimen-fixture-and-operating-criteria\/","title":{"rendered":"Power Supply Vibration Rating: Match the Specimen, Fixture and Operating Criteria"},"content":{"rendered":"<p class=\"lead\">A power supply vibration rating is meaningful only when the specimen, test method, mounting and acceptance criteria are identifiable. For a machine builder, the question is whether the evidence covers the ordered supply and the intended installation\u2014not whether a catalogue has a reassuring vibration or shock line.<\/p>\n<p>This guide uses the exact WEHO NDR-120-24 as an illustrative 24 V auxiliary-control specimen. Its verified source photographs and approved sheet establish identity, nominal output and mechanical mounting. They do not provide an operational vibration or shock report for either illustrated machine, and no passed severity is claimed here.<\/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\">Sommario<\/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=\"Attiva\/disattiva Sommario\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Attiva\/disattiva<\/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\/it\/news\/power-supply-vibration-rating-match-the-specimen-fixture-and-operating-criteria\/#Distinguish_the_test_method_and_the_specimen\" >Distinguish the test method and the specimen<\/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\/it\/news\/power-supply-vibration-rating-match-the-specimen-fixture-and-operating-criteria\/#Read_the_mounting_arrangement_with_the_severity\" >Read the mounting arrangement with the severity<\/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\/it\/news\/power-supply-vibration-rating-match-the-specimen-fixture-and-operating-criteria\/#Functional_criteria_need_an_operating_state\" >Functional criteria need an operating state<\/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\/it\/news\/power-supply-vibration-rating-match-the-specimen-fixture-and-operating-criteria\/#Keep_the_NDR-120-24_source_facts_bounded\" >Keep the NDR-120-24 source facts bounded<\/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\/it\/news\/power-supply-vibration-rating-match-the-specimen-fixture-and-operating-criteria\/#Use_a_test-evidence_handover_record\" >Use a test-evidence handover record<\/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\/it\/news\/power-supply-vibration-rating-match-the-specimen-fixture-and-operating-criteria\/#Review_changes_rather_than_carrying_a_rating_forward\" >Review changes rather than carrying a rating forward<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Distinguish_the_test_method_and_the_specimen\"><\/span>Distinguish the test method and the specimen<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The official description of <a href=\"https:\/\/webstore.iec.ch\/en\/publication\/547\" target=\"_blank\" rel=\"noopener\">IEC 60068-2-64<\/a> concerns broadband random vibration and the response of a specified specimen under defined requirements. Its scope includes transportation and operational environments, with particular distinctions for unpackaged items and packaging that forms part of a specimen. It does not make a random-vibration result interchangeable with every other dynamic test.<\/p>\n<p>Ask the supplier which method and edition were used. Keep shock, sine vibration and random vibration as separate entries when they are separately assessed. A transport test of a packed supply and an operational test of a rail-mounted supply also represent different specimens and arrangements. Record the actual scope instead of carrying one \u201cvibration approved\u201d phrase across all of them.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-application-a-29.png?quality=85&strip=all\" alt=\"Power Supply Vibration Rating: Match the Specimen, Fixture and Operating Criteria  title=\" width=\"1536\" height=\"1024\" power supply vibration rating: match the fixture and operating criteria title =\"\"><\/p>\n<p class=\"caption\">Illustrative rotary-capper control bay: an exact NDR-120-24 is rear-rail-mounted for a conditional 24 V auxiliary branch. This is not a vibration fixture, a main-drive power claim or evidence that the assembled machine passed a dynamic test.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Read_the_mounting_arrangement_with_the_severity\"><\/span>Read the mounting arrangement with the severity<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A dynamic-test record should identify what was mounted and how. Request the full model, construction revision, specimen quantity and identification, fixing arrangement, rail or fixture details, orientation and reported axes. Where a restraint or additional support was used, preserve that fact rather than treating the test as evidence for an unsupported installation.<\/p>\n<p>For an installation that uses a rail-mounted power supply, the receiving design needs to define its rail, backplate attachment and any supplier-required retention. The housing&#8217;s rear fixing must engage as intended. A rail drawn through the middle of a product, an invented bracket or a convenient generic clip is not a substitute for the actual mounting relationship.<\/p>\n<p>The requested test record should then link the defined specimen and mounting to the stated severity and duration. Obtain those values from the actual report and applicable procedure. This article supplies neither a test spectrum nor a shock acceleration, dwell time or acceptance threshold. Do not borrow those numbers from a neighbouring model or an unrelated machine environment.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Functional_criteria_need_an_operating_state\"><\/span>Functional criteria need an operating state<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u201cNo damage\u201d and \u201cno unacceptable functional change\u201d answer different questions. Ask which observations were made before, during and after the test, whether the supply was powered, what input and output-load conditions applied, and which functions were monitored. The resulting report should say what was observed, not merely show a photograph of the specimen on a fixture.<\/p>\n<p>For an actual equipment specification, the responsible engineer should define the relevant functional acceptance criteria and the environment to be assessed. Procurement can preserve that decision, the report and any deviations. It should not create an operational rating by assuming that a familiar power-supply series always passes under any load or mounting condition.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-application-b-27.png?quality=85&strip=all\" alt=\"Power Supply Vibration Rating: Match the Specimen, Fixture and Operating Criteria  title=\" width=\"1536\" height=\"1024\" power supply vibration rating: match the fixture and operating criteria title =\"\"><\/p>\n<p class=\"caption\">A different material-feeding cell places the supply in an upper-left protected control compartment. Its auxiliary connection and rear rail mounting illustrate a separate installation; they do not establish the cell&#8217;s operating vibration environment.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Keep_the_NDR-120-24_source_facts_bounded\"><\/span>Keep the NDR-120-24 source facts bounded<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The authentic source label identifies <strong>NDR-120-24<\/strong> and a nominal 24 V, 5.0 A output. It prints nominal input 100\u2013240 VAC, 2.6 A, 50\/60 Hz. Broader family operating-range statements remain separate from that physical label and do not imply a vibration capability throughout every electrical or environmental condition.<\/p>\n<p>The approved mechanical drawing maps a 40 mm front width, 125.2 mm upright height and 113.5 mm front-to-rear depth. The rear mount engages a rail attached to the backplate; the rail is behind the housing, not through its side. The photographs also distinguish the green terminal-block conductor entrances from the front screw-access openings. These are real installation facts, not a dynamic-test result.<\/p>\n<p>A rotary capper or feeder may use a 24 V auxiliary rail, but its actual electronics, actuators and load profile must be confirmed. The illustrations do not assign current demands, power a main motor from this supply or establish thermal and electrical headroom. A useful quotation inquiry supplies the actual branch requirements instead of relying on the machine name alone.<\/p>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-product-detail-26.png?quality=85&strip=all\" alt=\"Power Supply Vibration Rating: Match the Specimen, Fixture and Operating Criteria  title=\" width=\"1254\" height=\"1254\" power supply vibration rating: match the fixture and operating criteria title =\"\"><\/p>\n<p class=\"caption\">Illustrative operating-environment concept, not a vibration test: an NDR-120-24 is shown DIN-rail mounted with automated machinery in the background. No test specimen, fixture, severity level or result is depicted; a vibration claim requires the documented test configuration and the shipped build.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Use_a_test-evidence_handover_record\"><\/span>Use a test-evidence handover record<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<table>\n<thead>\n<tr>\n<th>Il record<\/th>\n<th>Requested evidence<\/th>\n<th>Common gap<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Method and scope<\/td>\n<td>Standard\/edition, operational or transportation scope, shock\/sine\/random method<\/td>\n<td>One phrase used for several different tests<\/td>\n<\/tr>\n<tr>\n<td>Specimen<\/td>\n<td>Full model, revision, identification and defined assembled condition<\/td>\n<td>Different variant or packaged item substituted<\/td>\n<\/tr>\n<tr>\n<td>Fixture and axes<\/td>\n<td>Actual mounting, rail\/fixing, restraints, orientation and reported axes<\/td>\n<td>Test attachment unlike the intended installation<\/td>\n<\/tr>\n<tr>\n<td>Severity and state<\/td>\n<td>Reported conditions, duration, powered state and input\/load configuration<\/td>\n<td>Values missing or copied from an unrelated table<\/td>\n<\/tr>\n<tr>\n<td>Criteria and results<\/td>\n<td>Defined observations, measured result, deviations and disposition<\/td>\n<td>A fixture photograph mistaken for a pass record<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-engineering-context-30.png?quality=85&strip=all\" alt=\"Power Supply Vibration Rating: Match the Specimen, Fixture and Operating Criteria  title=\" width=\"1536\" height=\"1024\" power supply vibration rating: match the fixture and operating criteria title =\"\"><\/p>\n<p class=\"caption\">Operational evidence chain: specimen \u2192 actual fixing\/axes \u2192 stated test conditions \u2192 observed result. No fabricated spectrum, acceleration or pass result is shown.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Review_changes_rather_than_carrying_a_rating_forward\"><\/span>Review changes rather than carrying a rating forward<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A changed supply, rail, retention method or mounting orientation should trigger review of whether the existing evidence still applies. This is not an automatic requirement to run a particular test; it is a request for the competent engineer&#8217;s documented assessment. Retain the decision beside the controlled installation and BOM.<\/p>\n<p>Use the <a href=\"https:\/\/www.wehopower.com\/it\/product\/ndr-dinrail-120w-ac-to-dc-single-output-switching-power-supply\/\">WEHO NDR-120 family page<\/a> for model discovery, then request the current exact-model sheet and the report relevant to your actual equipment requirement. A traceable response is more useful than an unqualified promise of vibration resistance.<\/p>","protected":false},"excerpt":{"rendered":"<p>Request an actual operational vibration\/shock report instead of converting a rating line or installation image into a passed-machine claim.<\/p>","protected":false},"author":2,"featured_media":18928,"parent":0,"menu_order":0,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149,284],"class_list":["post-18932","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-blog","news_category-product-articles","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news\/18932","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news"}],"about":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/types\/news"}],"author":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/comments?post=18932"}],"version-history":[{"count":0,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news\/18932\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/media\/18928"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/media?parent=18932"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news_category?post=18932"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}