{"id":16280,"date":"2026-10-19T16:33:17","date_gmt":"2026-10-19T15:33:17","guid":{"rendered":"https:\/\/ventsystems.de\/24v-fensterantrieb-an-230v-anschliessen\/"},"modified":"2026-10-24T17:39:11","modified_gmt":"2026-10-24T16:39:11","slug":"connecting-24v-window-drive-to-230v","status":"publish","type":"post","link":"https:\/\/ventsystems.de\/en\/24v-fensterantrieb-an-230v-anschliessen\/","title":{"rendered":"Connecting a 24 V window actuator to 230 V mains"},"content":{"rendered":"<p class=\"wp-block-paragraph\">A 24 V window actuator must <strong>never be connected directly to 230 V<\/strong> . It needs a controller or power supply that converts the mains voltage into 24 V DC. This article shows how it works, how many actuators one controller can supply and what to look out for with cables and accessories.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>In brief:<\/strong> A 24 V window actuator must never be connected directly to 230 V. It needs a control unit or power supply that converts 230 V into 24 V DC, for example the VS-C24-7A with 7 A output current. How many actuators it can supply depends on the sum of their current draws.<\/p>\n\n\n<h2 class=\"wp-block-heading\">How it works<\/h2>\n\n\n<p class=\"wp-block-paragraph\">the <a href=\"\/en\/product\/vs-ls7\/\">VS-C24-7A controller<\/a> is connected to 230 V AC and supplies 24 V DC to the actuator. The direction of travel is set by reversing polarity: swap plus and minus and the actuator runs the other way. It is operated via a button on the unit or by <a href=\"\/en\/product\/vs-c24-f-1-remote-control-for-control-vs-c24-7a\/\">radio remote control<\/a>.<\/p>\n\n\n<h2 class=\"wp-block-heading\">How many actuators can one controller handle?<\/h2>\n\n\n<p class=\"wp-block-paragraph\">What counts is the current. Add up the current consumption of all actuators running at the same time and compare the total with the output current of the controller. An example:<\/p>\n\n\n<ul class=\"wp-block-list\"><li>actuators <a href=\"\/en\/product\/vs-cka-300\/\">VS-CKA 300<\/a> or <a href=\"\/en\/product\/vs-sb-400\/\">VS-SB 400\/90<\/a>: 1.2 A each<\/li><li>VS-C24-7A: 7 A output current<\/li><li>Mathematically this is enough for 5 actuators (6 A); but plan some reserve<\/li><\/ul>\n\n\n<p class=\"wp-block-paragraph\">You can find the current consumption of your actuator in the data sheet on the product page under \u201cDownloads\u201d.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Choosing the right cable<\/h2>\n\n\n<p class=\"wp-block-paragraph\">At 24 V more current flows than at 230 V. On long cable runs, noticeable voltage is therefore lost and the actuator runs more slowly or stops. Choose a larger cable cross-section for longer distances. Installation on the 230 V mains is carried out by a qualified electrician.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">You can estimate the required cross-section for copper cables with this approximation:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>A = (2 \u00d7 L \u00d7 I) \u00f7 (56 \u00d7 \u0394U)<\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">A is the cross-section in mm\u00b2, L the single cable length in m, I the sum of the actuator currents in A and \u0394U the permissible voltage drop in V according to the actuator or control unit manufacturer. Choose the next larger standard cross-section. Example: a 25 m cable, 3.2 A and a permissible voltage drop of 1.2 V give around 2.4 mm\u00b2, so 2.5 mm\u00b2 is chosen. For smoke ventilation systems, the circuit integrity requirements of the fire safety concept also apply.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Push buttons, radio and sensors<\/h2>\n\n\n<ul class=\"wp-block-list\"><li><strong>Push button:<\/strong> to open and close at the push of a button, e.g. <a href=\"\/en\/product\/vs-lt-a-surface-mounted-ventilation-button\/\">VS-LT-A surface-mounted push button<\/a><\/li><li><strong>Radio:<\/strong> <a href=\"\/en\/product\/vs-c24-f-1-remote-control-for-control-vs-c24-7a\/\">VS-C24-F-1 hand-held transmitter<\/a> with wall holder<\/li><li><strong>Rain and wind:<\/strong> <a href=\"\/en\/product\/vs-rs\/\">VS-RS rain sensor<\/a> or <a href=\"\/en\/product\/vs-ws\/\">VS-WRLS-wind-rain-light sensor<\/a> close the windows automatically<\/li><\/ul>\n\n\n<p class=\"wp-block-paragraph\">How to combine push buttons, controllers and sensors sensibly is shown in the guide <a href=\"\/en\/ventilation-control-window-drives\/\">Ventilation control for window actuators<\/a>. The VS-C24-7A is also suitable for blinds and roller shutters: <a href=\"\/en\/24v-blind-control\/\">24V blind control<\/a>.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Rather go straight for 230 V?<\/h2>\n\n\n<p class=\"wp-block-paragraph\">230 V actuators are connected without a controller directly to a <a href=\"\/en\/product\/vs-lt-230\/\">Ventilation button<\/a> . In return, 24 V actuators are more flexible with sensors, radio and <a href=\"\/en\/dictionary\/tandem-operation\/\">synchronous operation<\/a>. The detailed comparison: <a href=\"\/en\/window-actuator-24v-or-230v\/\">Window actuator 24 V or 230 V<\/a>.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Important for SHEV<\/h2>\n\n\n<p class=\"wp-block-paragraph\">The VS-C24-7A is intended for everyday comfort ventilation. For smoke and heat exhaust, an approved SHEV control panel is required, see <a href=\"\/en\/dictionary\/rwa\/\">RWA<\/a>.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Frequently asked questions<\/h2>\n\n\n<h3 class=\"wp-block-heading\">What happens if I connect a 24 V actuator directly to 230 V?<\/h3>\n\n\n<p class=\"wp-block-paragraph\">The actuator is usually destroyed immediately, and mains voltage poses a hazard. A 24 V actuator must always be connected to a control unit or power supply with 24 V DC.<\/p>\n\n\n<h3 class=\"wp-block-heading\">Is a standard 24 V power supply enough?<\/h3>\n\n\n<p class=\"wp-block-paragraph\">Only to a limited extent. The power supply must deliver DC voltage and enough current for all actuators running at the same time. In addition, the polarity must be reversed to open and close. This is done by a control unit or a suitable push button. A ready-made control unit such as the VS-C24-7A is simpler.<\/p>\n\n\n<h2 class=\"wp-block-heading\">Consultation and offer<\/h2>\n\n\n<p class=\"wp-block-paragraph\">Send us dimensions, weight and a photo of your window, we will check the force and suggest the right actuator. Phone <a href=\"tel:+494050694631\">040 50694631<\/a> (Mon\u2013Fri 8 am\u20135 pm), <a href=\"\/en\/contact\/\">Contact form<\/a> or <a href=\"\/en\/measurement-sheet\/\">measurement sheet<\/a>.<\/p>\n\n\n<p><strong>Further reading:<\/strong> <a href=\"\/en\/window-actuator-24v-or-230v\/\">Window actuator: 24 V or 230 V?<\/a> \u00b7 <a href=\"\/en\/product-category\/controls\/\">Ventilation controls<\/a><\/p>","protected":false},"excerpt":{"rendered":"<p>Ein 24-V-Fensterantrieb darf nie direkt an 230 V angeschlossen werden. Er braucht eine Steuerung oder ein Netzteil, das die Netzspannung in 24 V Gleichspannung umwandelt. Dieser Beitrag zeigt, wie das funktioniert, wie viele Antriebe eine Steuerung versorgt und worauf Sie bei Kabel und Zubeh\u00f6r achten. Kurz erkl\u00e4rt: Ein 24-V-Fensterantrieb darf nie direkt an 230 V [&hellip;]<\/p>\n","protected":false},"author":9,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[1958],"tags":[],"post_folder":[],"class_list":["post-16280","post","type-post","status-publish","format-standard","hentry","category-lueftung-gebaeudeautomation"],"acf":[],"_links":{"self":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts\/16280","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/users\/9"}],"replies":[{"embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/comments?post=16280"}],"version-history":[{"count":5,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts\/16280\/revisions"}],"predecessor-version":[{"id":16700,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/posts\/16280\/revisions\/16700"}],"wp:attachment":[{"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/media?parent=16280"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/categories?post=16280"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/tags?post=16280"},{"taxonomy":"post_folder","embeddable":true,"href":"https:\/\/ventsystems.de\/en\/wp-json\/wp\/v2\/post_folder?post=16280"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}