{"id":18671,"date":"2026-10-07T17:31:14","date_gmt":"2026-10-07T09:31:14","guid":{"rendered":"https:\/\/www.wehopower.com\/?post_type=news&#038;p=18671"},"modified":"2026-10-08T17:23:00","modified_gmt":"2026-10-08T09:23:00","slug":"110v-vs-220v-power-supply-input-configuration","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/it\/news\/110v-vs-220v-power-supply-input-configuration\/","title":{"rendered":"Ingresso alimentatore 110V vs 220V: record di selezione e configurazione OEM"},"content":{"rendered":"<p><strong>Ultimo aggiornamento:<\/strong> 7 ottobre 2026<\/p>\n<p><strong>Risposta rapida:<\/strong> A 110V vs 220V power supply decision starts with the destination AC input and the exact supply&#8217;s input architecture. Determine whether the model accepts the required range automatically or needs a documented manual input selection. Record the received model and input markings, and have the actual selector inspected with power isolated before energizing. A warning sticker or product photograph does not prove the selector&#8217;s position.<\/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\/110v-vs-220v-power-supply-input-configuration\/#Separate_Nominal_Mains_Language_from_Operating_Ranges\" >Separate Nominal Mains Language from Operating Ranges<\/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\/110v-vs-220v-power-supply-input-configuration\/#Ask_Whether_Input_Selection_Is_Automatic_or_Manual\" >Ask Whether Input Selection Is Automatic or Manual<\/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\/110v-vs-220v-power-supply-input-configuration\/#Read_the_S-120-12_Example_Without_Inferring_a_Setting\" >Read the S-120-12 Example Without Inferring a Setting<\/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\/110v-vs-220v-power-supply-input-configuration\/#Make_the_Configuration_Part_of_the_OEM_Record\" >Make the Configuration Part of the OEM Record<\/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\/110v-vs-220v-power-supply-input-configuration\/#Preserve_Terminal_and_Mechanical_Differences\" >Preserve Terminal and Mechanical Differences<\/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\/110v-vs-220v-power-supply-input-configuration\/#Close_the_Selection_Before_Energizing\" >Close the Selection Before Energizing<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/it\/news\/110v-vs-220v-power-supply-input-configuration\/#Key_Takeaways\" >Punti chiave<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.wehopower.com\/it\/news\/110v-vs-220v-power-supply-input-configuration\/#Conclusion\" >Conclusione<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wehopower.com\/it\/news\/110v-vs-220v-power-supply-input-configuration\/#Frequently_Asked_Questions\" >Domande frequenti<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.wehopower.com\/it\/news\/110v-vs-220v-power-supply-input-configuration\/#Does_a_110220V_sticker_prove_which_input_is_selected\" >Does a 110\/220V sticker prove which input is selected?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.wehopower.com\/it\/news\/110v-vs-220v-power-supply-input-configuration\/#Can_an_input_selector_supply_110V_AC_to_another_device\" >Can an input selector supply 110V AC to another device?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.wehopower.com\/it\/news\/110v-vs-220v-power-supply-input-configuration\/#What_should_be_checked_when_replacing_S-120-12\" >What should be checked when replacing S-120-12?<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Separate_Nominal_Mains_Language_from_Operating_Ranges\"><\/span>Separate Nominal Mains Language from Operating Ranges<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>\u201c110V\u201d and \u201c220V\u201d are often procurement shorthand. The installation specification needs the actual nominal supply, its permitted variation, frequency and the equipment&#8217;s connection requirements. Compare that information with the exact model and revision offered by the supplier. Two products with similar output labels can have different input arrangements.<\/p>\n<p>A 110V vs 220V power supply review should therefore have two distinct records: what the installation requires, and what the received unit is documented to accept. Do not substitute a generic family description for the model&#8217;s applicable specification, or treat a nominal label as a complete operating-range statement.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Ask_Whether_Input_Selection_Is_Automatic_or_Manual\"><\/span>Ask Whether Input Selection Is Automatic or Manual<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>For a supply documented to accept the required AC range automatically, confirm the model-specific range and any input-dependent operating limits. For a manually configured model, obtain the supplier&#8217;s instructions for selecting and checking the input configuration. Confirm responsibility for this step in the OEM assembly and commissioning procedure.<\/p>\n<p>The choice is about the input circuit of the DC power supply. An input selector does not turn the unit into a general-purpose 220V-to-110V AC converter for other equipment. The DC output and every connected load still need their own compatibility assessment.<\/p>\n<figure class=\"wp-block-image size-full\"><img fetchpriority=\"high\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-38.png?quality=85&strip=all\" alt=\"110V vs 220V Power Supply Input: OEM Selection and Configuration Records  title=\" class=\"wp-image-18764\" loading=\"eager\" 110v vs 220v power supply input: oem selection and configuration records title =\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-38.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-38-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-38-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-38-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/01-product-detail-38-18x12.png?quality=85&strip=all 18w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<h2><span class=\"ez-toc-section\" id=\"Read_the_S-120-12_Example_Without_Inferring_a_Setting\"><\/span>Read the S-120-12 Example Without Inferring a Setting<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The documented WEHO S-120-12 has a physical output marking of +12V 10A. Its right-side nameplate records two nominal AC input lines: 100\u2013120VAC 2.4A and 200\u2013240VAC 1.2A, with 50\/60Hz. These literal markings identify the pictured unit; the installation decision must still use the applicable complete specification and destination input.<\/p>\n<p>The roof warning states that 110\/220V is selected by switch and instructs the user to check input voltage before power-on. The qualified product views show that instruction but do not expose the selector lever or establish its position. Accordingly, neither the photograph nor this article records a verified 110V or 220V setting.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-application-one-4.png?quality=85&strip=all\" alt=\"110V vs 220V Power Supply Input: OEM Selection and Configuration Records  title=\" class=\"wp-image-18765\" 110v vs 220v power supply input: oem selection and configuration records title =\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-application-one-4.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-application-one-4-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-application-one-4-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-application-one-4-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/02-application-one-4-18x12.png?quality=85&strip=all 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<p>Do not energize a unit with an unknown or mismatched input configuration. The responsible technician should isolate power and follow the supplier&#8217;s documented procedure to identify the actual selector and record its disposition. Resolve uncertainty with the supplier before releasing the equipment; do not use trial energizing as a way to discover the setting.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Make_the_Configuration_Part_of_the_OEM_Record\"><\/span>Make the Configuration Part of the OEM Record<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Create a configuration field tied to the equipment serial number or build record. Include the destination input, exact supply model, received-unit markings, applicable instruction revision, responsible person and the result of the physical check. A supplier&#8217;s shipping description is useful background but does not replace a check of the unit installed in the machine.<\/p>\n<p>If the same equipment is built for different destinations, control the power configuration alongside the bill of materials and assembly instructions. Record how the configuration is identified during service and how a replacement unit is held pending verification. Changing a sales destination or supply model can invalidate an earlier disposition even when the DC output voltage is unchanged.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Preserve_Terminal_and_Mechanical_Differences\"><\/span>Preserve Terminal and Mechanical Differences<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>In the pictured S-120-12 front bank, the seven positions are L, N, earth, COM, COM, +V, +V from left to right, beneath the transparent cover. The voltage-adjustment control and indicator are separate from those connection positions. Link the actual markings and supplier pin assignment to the OEM drawing; do not infer an AC selector position from the output adjustment control.<\/p>\n<p>The chassis is documented as 199mm overall length, 98mm width and 38mm height. A separate 197mm span in the complete drawing describes a different boundary, so it should not replace the overall length in the enclosure layout. Use the documented chassis mounting holes and provide the equipment-specific terminal, wiring and ventilation space. This model is not a native DIN-rail module.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-application-two-4.png?quality=85&strip=all\" alt=\"110V vs 220V Power Supply Input: OEM Selection and Configuration Records  title=\" class=\"wp-image-18766\" 110v vs 220v power supply input: oem selection and configuration records title =\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-application-two-4.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-application-two-4-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-application-two-4-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-application-two-4-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/03-application-two-4-18x12.png?quality=85&strip=all 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<p>These details matter when purchasing replacements: a similar rectangular housing may have a different input configuration, terminal assignment or mounting interface. Check the exact alternative against the destination input and equipment drawing before accepting it.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Close_the_Selection_Before_Energizing\"><\/span>Close the Selection Before Energizing<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>The release checklist should show that the destination input is documented, the exact model&#8217;s applicable input data is available, the required configuration has been physically checked, and the output\/load and installation design have been reviewed. Keep unresolved items on hold rather than treating a familiar product family as sufficient evidence.<\/p>\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"1536\" height=\"1024\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-engineering-context-1.png?quality=85&amp;strip=all\" alt=\"110V vs 220V Power Supply Input: OEM Selection and Configuration Records  title=\" class=\"wp-image-18670\" 110v vs 220v power supply input: oem selection and configuration records title =\"\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-engineering-context-1.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-engineering-context-1-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-engineering-context-1-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-engineering-context-1-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/10\/04-engineering-context-1-18x12.png?quality=85&strip=all 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<p>The assembled equipment&#8217;s electrical acceptance procedure remains a separate step with its own responsible personnel and criteria. A configuration record is not a performance test result, and a 12V\/10A marking does not establish that an unspecified machine load or environment is suitable.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Key_Takeaways\"><\/span>Punti chiave<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul><li>Record the actual destination input instead of relying only on \u201c110V\u201d or \u201c220V\u201d shorthand.<\/li><li>Distinguish automatically accepted input ranges from manual input configuration.<\/li><li>Treat the S-120-12 warning as an instruction to check, not proof of a selector position.<\/li><li>Preserve the exact model, terminal assignment and chassis mounting in the OEM drawing.<\/li><li>Hold a replacement or unverified configuration until the documented checks are resolved.<\/li><\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusione<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>110V versus 220V input selection is a controlled equipment configuration decision. Match the destination input to the exact model&#8217;s documentation, inspect any required selector under isolation and preserve the result in the build and service record. This gives procurement, assembly and field service a consistent basis for releasing the installed DC power supply.<\/p>\n<section class=\"weho-faq\" aria-labelledby=\"weho-faq-heading\">\n<h2 id=\"weho-faq-heading\"><span class=\"ez-toc-section\" id=\"Frequently_Asked_Questions\"><\/span>Domande frequenti<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<article class=\"weho-faq-item\">\n<h3><span class=\"ez-toc-section\" id=\"Does_a_110220V_sticker_prove_which_input_is_selected\"><\/span>Does a 110\/220V sticker prove which input is selected?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>No. It identifies the need for a configuration check. The actual selector and its position must be inspected with power isolated according to the supplier procedure and recorded for the installed unit.<\/p>\n<\/article>\n<article class=\"weho-faq-item\">\n<h3><span class=\"ez-toc-section\" id=\"Can_an_input_selector_supply_110V_AC_to_another_device\"><\/span>Can an input selector supply 110V AC to another device?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The selector concerns the DC supply input configuration. It does not establish a general-purpose220V-to110V AC conversion function or compatibility with another AC device.<\/p>\n<\/article>\n<article class=\"weho-faq-item\">\n<h3><span class=\"ez-toc-section\" id=\"What_should_be_checked_when_replacing_S-120-12\"><\/span>What should be checked when replacing S-120-12?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Verify the destination input, exact replacement model and applicable documentation, actual input configuration under isolation, output\/load requirements, terminal assignment and documented chassis mounting before releasing the equipment.<\/p>\n<\/article>\n<\/section>","protected":false},"excerpt":{"rendered":"<p>Match the destination AC input to exact model documentation and record isolated physical checks for a manually selected power supply input.<\/p>","protected":false},"author":1,"featured_media":18764,"parent":0,"menu_order":28,"comment_status":"closed","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149],"class_list":["post-18671","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-blog","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news\/18671","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/comments?post=18671"}],"version-history":[{"count":2,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news\/18671\/revisions"}],"predecessor-version":[{"id":18767,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news\/18671\/revisions\/18767"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/media\/18764"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/media?parent=18671"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news_category?post=18671"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}