{"id":17258,"date":"2026-09-07T02:00:00","date_gmt":"2026-09-06T18:00:00","guid":{"rendered":"https:\/\/www.wehopower.com\/?post_type=news&p=17258"},"modified":"2026-09-07T02:00:00","modified_gmt":"2026-09-06T18:00:00","slug":"power-supply-for-solenoid-valves-24v-sizing-guide","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/","title":{"rendered":"Power Supply for Solenoid Valves: 24V Sizing Guide"},"content":{"rendered":"<p class=\"weho-last-updated\" style=\"text-align:center;color:#E60013\">Last Updated: 2026-09-05<\/p>\n<blockquote class=\"weho-quick-answer\">\n<p>power supply for solenoid valve selection starts with the coil&#8217;s rated voltage, holding current, pickup current, duty cycle, and the number of valves that may energize together. Add controller and relay loads, account for cable voltage drop and ambient derating, then choose documented branch protection and suppression for the exact valve and control system.<\/p>\n<\/blockquote>\n<figure class=\"weho-blog-image weho-blog-hero\"><img fetchpriority=\"high\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/01-hero-17.png?quality=85&strip=all\" alt=\"WEHO EDR-240-24 DIN rail power supply in a 24V solenoid valve control panel\" title=\"WEHO EDR-240-24 DIN rail power supply in a 24V solenoid valve control panel\" width=\"1536\" height=\"1024\" class=\"alignnone size-full wp-image-17253\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/01-hero-17.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/01-hero-17-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/01-hero-17-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/01-hero-17-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/01-hero-17-18x12.png?quality=85&strip=all 18w\" sizes=\"(max-width: 1536px) 100vw, 1536px\" \/><\/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\">Table of Contents<\/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;\">Toggle<\/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\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Size_a_power_supply_for_solenoid_valve_loads_from_the_coil_data\" >Size a power supply for solenoid valve loads from the coil data<\/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\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Build_the_24V_load_list_before_choosing_a_supply\" >Build the 24V load list before choosing a supply<\/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\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Check_pickup_current_and_simultaneous_operation\" >Check pickup current and simultaneous operation<\/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\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Coordinate_branch_protection_and_suppression\" >Coordinate branch protection and suppression<\/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\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Design_the_panel_for_service_and_cooling\" >Design the panel for service and cooling<\/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\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Commission_the_valves_under_worst-case_demand\" >Commission the valves under worst-case demand<\/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\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Maintain_the_24V_valve_circuit\" >Maintain the 24V valve circuit<\/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\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/#FAQs\" >FAQs<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.wehopower.com\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/#How_many_24V_solenoid_valves_can_one_power_supply_operate\" >How many 24V solenoid valves can one power supply operate?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.wehopower.com\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Should_a_solenoid_valve_power_supply_be_sized_from_watts_or_amps\" >Should a solenoid valve power supply be sized from watts or amps?<\/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\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Why_does_the_24V_supply_dip_when_a_valve_opens\" >Why does the 24V supply dip when a valve opens?<\/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\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Do_DC_solenoid_valves_need_flyback_suppression\" >Do DC solenoid valves need flyback suppression?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.wehopower.com\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Can_a_PLC_power_supply_also_power_solenoid_valves\" >Can a PLC power supply also power solenoid valves?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.wehopower.com\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/#What_wire_size_should_be_used_for_a_24V_solenoid_valve\" >What wire size should be used for a 24V solenoid valve?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.wehopower.com\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Key_Takeaways\" >Key Takeaways<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.wehopower.com\/bn\/news\/power-supply-for-solenoid-valves-24v-sizing-guide\/#Conclusion\" >Conclusion<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Size_a_power_supply_for_solenoid_valve_loads_from_the_coil_data\"><\/span>Size a power supply for solenoid valve loads from the coil data<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Start with the valve coil label or datasheet. Confirm whether the coil is 24V DC, its permitted voltage range, holding current or power, pickup current, duty rating, polarity, and required suppression. Similar-looking valves can have very different electrical demands, so cabinet drawings or assumptions are not enough.<\/p>\n<p>For each DC coil, calculate holding current when only power is given:<\/p>\n<p><code>Holding current (A) = coil power (W) \u00f7 rated voltage (V)<\/code><\/p>\n<p>Then record pickup current or the manufacturer&#8217;s startup multiplier. Some coils include internal suppression or electronics that change their turn-on behavior. The selected power supply for solenoid valve circuits must support both the continuous sum and the maximum credible switching event.<\/p>\n<p>Build a table with one row per valve: tag, function, rated voltage, holding current, pickup current, maximum on-time, and which other valves can energize simultaneously. Include manifold pilots, dump valves, safety-related valves, contactors, and any accessories powered from the same 24V rail.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Build_the_24V_load_list_before_choosing_a_supply\"><\/span>Build the 24V load list before choosing a supply<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure class=\"weho-blog-image\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/02-technical-diagram-18.png?quality=85&strip=all\" alt=\"Functional architecture for a 24V solenoid valve power supply with branch protection and multiple coils\" title=\"Functional architecture for a 24V solenoid valve power supply with branch protection and multiple coils\" width=\"1536\" height=\"1024\" class=\"alignnone size-full wp-image-17254\" loading=\"lazy\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/02-technical-diagram-18.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/02-technical-diagram-18-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/02-technical-diagram-18-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/02-technical-diagram-18-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/02-technical-diagram-18-18x12.png?quality=85&strip=all 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<p>Separate the load list into continuous, intermittent, and startup demand. Continuous demand includes PLCs, remote I\/O, relays that remain energized, sensors, communication devices, and valve coils held on during normal operation. Intermittent demand covers coils that cycle. Startup demand captures the largest realistic group that can pick up together.<\/p>\n<p>A practical current expression is:<\/p>\n<p><code>Required current = continuous loads + simultaneous coil holding current + simultaneous pickup allowance<\/code><\/p>\n<p>Apply the power supply manufacturer&#8217;s derating rules for ambient temperature, input voltage, mounting orientation, and altitude where applicable. Add an engineering margin based on uncertainty and future changes, but do not use a fixed percentage as a substitute for pickup-current data.<\/p>\n<p>Sequence logic matters. A machine may normally open valves one by one but command a whole bank after an emergency reset or recipe change. Review startup, shutdown, alarm recovery, cleaning, and manual modes. The worst electrical sequence may not be the normal production cycle.<\/p>\n<p>If the PLC and I\/O share the same rail, include them in the calculation and decide whether valve transients could disturb control electronics. The related <a href=\"https:\/\/www.wehopower.com\/news\/plc-power-supply-24v-din-rail-sizing-control-panels\/\">PLC Power Supply sizing guide<\/a> explains how to account for control-panel loads and derating.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Check_pickup_current_and_simultaneous_operation\"><\/span>Check pickup current and simultaneous operation<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure class=\"weho-blog-image\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/03-product-17.png?quality=85&strip=all\" alt=\"WEHO EDR-240-24 DIN rail supply on a disconnected quality inspection fixture\" title=\"WEHO EDR-240-24 DIN rail supply on a disconnected quality inspection fixture\" width=\"1536\" height=\"1024\" class=\"alignnone size-full wp-image-17255\" loading=\"lazy\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/03-product-17.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/03-product-17-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/03-product-17-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/03-product-17-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/03-product-17-18x12.png?quality=85&strip=all 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<p>Measure voltage at the valve or manifold while the largest permitted group energizes. A stable reading at the supply does not prove adequate voltage at the coil because conductor, connector, relay, fuse, and terminal resistance create drop. Compare the measured coil voltage with the valve&#8217;s documented operating range.<\/p>\n<p>If the rail dips, determine whether the cause is supply current limiting, insufficient peak response, undersized conductors, long cable runs, loose terminals, or too many simultaneous loads. Do not raise output voltage until the distribution loss and the voltage limits of every connected device are understood.<\/p>\n<p>The <a href=\"https:\/\/www.wehopower.com\/product\/din-rail-switching-power-supply-edr-240-240w-24v-48v-industrial-ac-to-dc-power-supply\/\">WEHO EDR-240 DIN rail power supply page<\/a> is an appropriate family reference for industrial DIN-rail installations. The specific 24V variant, usable current, derating, terminal data, and protection behavior must be confirmed from current documentation before use.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Coordinate_branch_protection_and_suppression\"><\/span>Coordinate branch protection and suppression<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Divide valve loads into logical protected branches so one short circuit does not unnecessarily disable the entire machine. Branch protection must coordinate with conductor size, output characteristics, expected pickup current, and the fault response required by the machine design. A large upstream device alone may not adequately protect small field wiring.<\/p>\n<p>Inductive coils generate a turn-off voltage. DC valves often use a diode, TVS device, varistor, or electronic suppression, but these methods are not interchangeable. A simple diode can slow valve release, and polarity-sensitive suppression must be connected correctly. Follow the exact valve, PLC output, relay, and safety-circuit documentation. Do not add a generic suppression component where response time is safety-relevant.<\/p>\n<p>Keep high-current valve branches organized separately from sensitive analog and communication wiring. Use the grounding, shielding, and cable-routing method defined by the equipment design. Ensure the protective earth and panel bonding are complete before energization.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Design_the_panel_for_service_and_cooling\"><\/span>Design the panel for service and cooling<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure class=\"weho-blog-image\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/04-installation-17.png?quality=85&strip=all\" alt=\"WEHO EDR-240-24 power supply being secured to DIN rail inside a control panel\" title=\"WEHO EDR-240-24 power supply being secured to DIN rail inside a control panel\" width=\"1536\" height=\"1024\" class=\"alignnone size-full wp-image-17256\" loading=\"lazy\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/04-installation-17.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/04-installation-17-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/04-installation-17-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/04-installation-17-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/04-installation-17-18x12.png?quality=85&strip=all 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<p>Mount the supply in its approved orientation with the specified clearances. Keep air paths away from hot drives, resistors, and transformers. In a sealed or washed-down machine enclosure, calculate cabinet heat rise rather than relying on room temperature.<\/p>\n<p>Provide readable branch labels and service access to fuses, electronic protection modules, relays, and terminals. Conductors should have suitable ferrules or terminations, strain relief, and documented tightening torque. A DIN-rail device must be fully engaged with the rail and supported so vibration cannot release it.<\/p>\n<p>Review the <a href=\"https:\/\/www.wehopower.com\/product_category\/din-rail-power-supply\/\">WEHO DIN rail power supply category<\/a> when different output ranges or installation envelopes are required. Choose from verified electrical and mechanical requirements rather than appearance.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Commission_the_valves_under_worst-case_demand\"><\/span>Commission the valves under worst-case demand<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<figure class=\"weho-blog-image\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/05-application-17.png?quality=85&strip=all\" alt=\"WEHO DIN rail power supply operating in a food processing solenoid valve control cabinet\" title=\"WEHO DIN rail power supply operating in a food processing solenoid valve control cabinet\" width=\"1536\" height=\"1024\" class=\"alignnone size-full wp-image-17257\" loading=\"lazy\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/05-application-17.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/05-application-17-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/05-application-17-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/05-application-17-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/09\/05-application-17-18x12.png?quality=85&strip=all 18w\" sizes=\"auto, (max-width: 1536px) 100vw, 1536px\" \/><\/figure>\n<p>Before production, verify polarity, branch labeling, protective-earth continuity, and output voltage with loads disabled. Then energize branches in a controlled sequence. Test the maximum simultaneous valve command allowed by the control logic and observe supply voltage, current, controller resets, relay behavior, and coil response.<\/p>\n<p>Repeat the test after the cabinet reaches its normal operating temperature. A supply that works for a short cold test may current-limit or overheat later. Confirm manual mode, automatic sequences, emergency recovery, and power-restoration behavior because each can create a different combination of loads.<\/p>\n<p>At the farthest valve, measure voltage during pickup and while held. Check for excessive connector heating and verify that suppression does not make release too slow for the process. Record the accepted values as the commissioning baseline.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Maintain_the_24V_valve_circuit\"><\/span>Maintain the 24V valve circuit<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Valve coils and connectors are field components exposed to vibration, moisture, heat, and mechanical service. Periodically inspect cable glands, connectors, manifold plugs, branch protection, and cabinet filters. Compare current and voltage with the commissioning record when cycling slows or control equipment resets.<\/p>\n<p>Update the load list whenever valves, manifolds, sensors, or PLC modules are added. A small change can affect the simultaneous peak even when the continuous load remains similar. Do not assume unused nameplate watts are automatically available under all ambient conditions.<\/p>\n<p>For a model review, provide the coil datasheets, valve count, simultaneous sequence, cable length, ambient temperature, enclosure layout, and control architecture to [sarayu@chnwh.com](mailto:sarayu@chnwh.com), or contact WEHO through the <a href=\"https:\/\/www.wehopower.com\/contact\/\">contact page<\/a>.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>FAQs<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<div class=\"weho-visible-faq\">\n<h3><span class=\"ez-toc-section\" id=\"How_many_24V_solenoid_valves_can_one_power_supply_operate\"><\/span>How many 24V solenoid valves can one power supply operate?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Divide the usable output current by the verified simultaneous demand, not simply by one coil&#8217;s holding current. Include pickup current, the maximum number of valves energized together, PLC and relay loads, derating, cable voltage drop, and design margin.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Should_a_solenoid_valve_power_supply_be_sized_from_watts_or_amps\"><\/span>Should a solenoid valve power supply be sized from watts or amps?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Use both. Confirm the coil voltage first, calculate simultaneous current, and then verify total watts at that voltage. Current is especially important because pickup demand and branch conductors are commonly specified in amperes.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Why_does_the_24V_supply_dip_when_a_valve_opens\"><\/span>Why does the 24V supply dip when a valve opens?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>The coil may draw a higher pickup current than its holding current, several valves may switch together, or cable and terminal resistance may be excessive. Measure the voltage at the load during the event and compare it with the valve and supply documentation.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Do_DC_solenoid_valves_need_flyback_suppression\"><\/span>Do DC solenoid valves need flyback suppression?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Inductive DC coils commonly require suppression to control the turn-off voltage, but the correct diode, TVS, or other device depends on valve polarity, release-time requirements, and the output device. Follow the valve and controller manufacturers&#8217; approved circuit.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Can_a_PLC_power_supply_also_power_solenoid_valves\"><\/span>Can a PLC power supply also power solenoid valves?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>It can when the documented current, peak demand, protection coordination, noise limits, and grounding arrangement are suitable. Separate branches or supplies may be preferable when valve transients could disturb sensitive PLC I\/O.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"What_wire_size_should_be_used_for_a_24V_solenoid_valve\"><\/span>What wire size should be used for a 24V solenoid valve?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p>Select conductor size from circuit current, permitted voltage drop, cable length, installation method, temperature, local rules, and terminal capacity. Do not choose it from voltage alone; confirm the result against the valve and control-panel documentation.<\/p>\n<\/div>\n<h2><span class=\"ez-toc-section\" id=\"Key_Takeaways\"><\/span>Key Takeaways<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ul>\n<li>Confirm the exact coil voltage, holding current, pickup current, duty cycle, and suppression.<\/li>\n<li>Size from the maximum credible simultaneous sequence, including controllers and relays.<\/li>\n<li>Check voltage at the valve during pickup, not only at the supply terminals.<\/li>\n<li>Coordinate branch protection, conductor size, and inductive suppression with device documentation.<\/li>\n<li>Apply ambient and mounting derating and test again after the cabinet is warm.<\/li>\n<li>Keep an updated load schedule and commissioning baseline for future changes.<\/li>\n<\/ul>\n<h2><span class=\"ez-toc-section\" id=\"Conclusion\"><\/span>Conclusion<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>A reliable 24V valve circuit begins with accurate coil data and an honest simultaneous-load model. Select the supply, conductors, branch protection, and suppression as one system. Then commission the worst operating sequence at normal temperature and verify voltage at the actual coils. This method protects both valve operation and sensitive control electronics.<\/p>\n<div class=\"weho-article-cta\">\n<p>Review the <a href=\"https:\/\/www.wehopower.com\/product_category\/din-rail-power-supply\/\">relevant WEHO product category<\/a>, email <a href=\"mailto:sarayu@chnwh.com\">sarayu@chnwh.com<\/a>, or <a href=\"https:\/\/www.wehopower.com\/contact\/\">contact WEHO<\/a> with the input voltage, output load, ambient temperature, and installation details.<\/p>\n<\/div>\n<p><script type=\"application\/ld+json\" class=\"weho-faq-schema\">{\"@context\":\"https:\/\/schema.org\",\"@type\":\"FAQPage\",\"mainEntity\":[{\"@type\":\"Question\",\"name\":\"How many 24V solenoid valves can one power supply operate?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Divide the usable output current by the verified simultaneous demand, not simply by one coil's holding current. Include pickup current, the maximum number of valves energized together, PLC and relay loads, derating, cable voltage drop, and design margin.\"}},{\"@type\":\"Question\",\"name\":\"Should a solenoid valve power supply be sized from watts or amps?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Use both. Confirm the coil voltage first, calculate simultaneous current, and then verify total watts at that voltage. Current is especially important because pickup demand and branch conductors are commonly specified in amperes.\"}},{\"@type\":\"Question\",\"name\":\"Why does the 24V supply dip when a valve opens?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"The coil may draw a higher pickup current than its holding current, several valves may switch together, or cable and terminal resistance may be excessive. Measure the voltage at the load during the event and compare it with the valve and supply documentation.\"}},{\"@type\":\"Question\",\"name\":\"Do DC solenoid valves need flyback suppression?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Inductive DC coils commonly require suppression to control the turn-off voltage, but the correct diode, TVS, or other device depends on valve polarity, release-time requirements, and the output device. Follow the valve and controller manufacturers' approved circuit.\"}},{\"@type\":\"Question\",\"name\":\"Can a PLC power supply also power solenoid valves?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"It can when the documented current, peak demand, protection coordination, noise limits, and grounding arrangement are suitable. Separate branches or supplies may be preferable when valve transients could disturb sensitive PLC I\/O.\"}},{\"@type\":\"Question\",\"name\":\"What wire size should be used for a 24V solenoid valve?\",\"acceptedAnswer\":{\"@type\":\"Answer\",\"text\":\"Select conductor size from circuit current, permitted voltage drop, cable length, installation method, temperature, local rules, and terminal capacity. Do not choose it from voltage alone; confirm the result against the valve and control-panel documentation.\"}}]}<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>power supply for solenoid valve sizing guide for 24V coils, inrush current, simultaneous load, voltage drop, protection, and panel installation.<\/p>","protected":false},"author":1,"featured_media":17253,"parent":0,"menu_order":51,"comment_status":"","ping_status":"","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149,148],"class_list":["post-17258","news","type-news","status-publish","format-standard","has-post-thumbnail","hentry","news_category-blog","news_category-industry-news","entry"],"acf":[],"post_mailing_queue_ids":[],"_links":{"self":[{"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/news\/17258","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\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/comments?post=17258"}],"version-history":[{"count":1,"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/news\/17258\/revisions"}],"predecessor-version":[{"id":17388,"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/news\/17258\/revisions\/17388"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/media\/17253"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/media?parent=17258"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/bn\/wp-json\/wp\/v2\/news_category?post=17258"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}