{"id":16229,"date":"2026-08-14T10:35:36","date_gmt":"2026-08-14T02:35:36","guid":{"rendered":"https:\/\/www.wehopower.com\/?post_type=news&#038;p=16229"},"modified":"2026-08-10T23:21:10","modified_gmt":"2026-08-10T15:21:10","slug":"security-power-supply-guide-for-cctv-and-access-control-systems","status":"publish","type":"news","link":"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/","title":{"rendered":"Guida all 'alimentazione di sicurezza per CCTV e sistemi di controllo degli accessi"},"content":{"rendered":"<div>\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\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Introduction\" >Introduzione<\/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\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Understanding_Security_System_Power_Requirements\" >Comprensione dei requisiti di alimentazione del sistema di sicurezza<\/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\/security-power-supply-guide-for-cctv-and-access-control-systems\/#How_to_Choose_the_Right_Security_Power_Supply\" >Come scegliere il giusto alimentatore di sicurezza<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Output_Voltage_and_Current_Requirements\" >Voltaggio di uscita e requisiti attuali<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Total_System_Power_Consumption\" >Consumo energetico totale del sistema<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Capacity_Margin_and_Scalability\" >Margine di capacit\u00e0 e scalabilit\u00e0<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Compatibility_with_Security_Devices\" >Compatibilit\u00e0 con i dispositivi di sicurezza<\/a><\/li><\/ul><\/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\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Centralized_Vs_Distributed_Power_Supply_for_Security_Systems\" >Alimentazione centralizzata vs. alimentazione distribuita per sistemi di sicurezza<\/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\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Power_Supply_Considerations_for_CCTV_Systems\" >Considerazioni sull 'alimentazione per i sistemi CCTV<\/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\/security-power-supply-guide-for-cctv-and-access-control-systems\/#PoE_vs_Non-PoE_Cameras\" >Fotocamere PoE e non PoE<\/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\/security-power-supply-guide-for-cctv-and-access-control-systems\/#IR_Night_Vision_Power_Requirements\" >IR Night Vision Requisiti di potenza<\/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\/security-power-supply-guide-for-cctv-and-access-control-systems\/#PTZ_Camera_Startup_Power\" >Fotocamera di avvio PTZ Startup Power<\/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\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Long_Cable_Voltage_Drop\" >Lunghezza del cavo Voltage Drop<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Power_Supply_Requirements_for_Access_Control_Systems\" >Requisiti di alimentazione per i sistemi di controllo degli accessi<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Electric_Locks\" >Serrature elettriche<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Card_Readers\" >Lettori Card<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Controllers\" >Controllori<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Backup_Power_Requirements\" >Requisiti di potenza di backup<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Common_Security_Power_Supply_Selection_Mistakes\" >Errori comuni di selezione dell 'alimentatore di sicurezza<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Undersized_Power_Supply_Capacity\" >Capacit\u00e0 di alimentazione elettrica sottodimensionata<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Ignoring_Startup_Current\" >Attenzione alla startup current<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#No_Backup_Power_Planning\" >Nessuna pianificazione del potere di backup<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Choosing_Incompatible_Voltage_Ratings\" >Scelta di valori di tensione incompatibili<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#FAQs\" >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-25\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#What_Power_Supply_is_Best_for_CCTV_Cameras\" >Quale alimentatore \u00e8 il migliore per le telecamere CCTV?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-26\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#How_Much_Power_Does_a_Security_Camera_System_Need\" >Quanta potenza ha bisogno di un sistema di telecamere di sicurezza?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-27\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#Do_Access_Control_Systems_Need_Backup_Power\" >I sistemi di controllo degli accessi hanno bisogno di alimentazione di backup?<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-28\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/#_Conclusion\" >\u00a0Conclusione<\/a><\/li><\/ul><\/nav><\/div>\n<h2><span class=\"ez-toc-section\" id=\"Introduction\"><\/span>Introduzione<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img fetchpriority=\"high\" decoding=\"async\" class=\"size-full wp-image-16438\" title=\"Alimentazione di sicurezza\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Security-Power-Supply.webp?quality=85&strip=all\" alt=\"Alimentazione di sicurezza\" width=\"630\" height=\"330\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Security-Power-Supply.webp?quality=85&strip=all 630w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Security-Power-Supply-300x157.webp?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Security-Power-Supply-18x9.webp?quality=85&strip=all 18w\" sizes=\"(max-width: 630px) 100vw, 630px\" \/><\/p>\n<\/div>\n<div>La scelta del giusto alimentatore di sicurezza \u00e8 una delle decisioni pi\u00f9 importanti che prenderai quando progetterai un sistema di controllo degli accessi o un sistema di videosorveglianza affidabile. <a href=\"https:\/\/www.wehopower.com\/it\/products\/\" target=\"_blank\" rel=\"noopener\">12V DC Alimentazione di sicurezza<\/a> Garantisce che le telecamere, i lettori, le serrature e i controller funzionino in modo coerente, anche in caso di utilizzo a lungo termine o interruzioni di corrente impreviste.<br \/>\nIn questa guida, imparerai come valutare i requisiti di alimentazione, selezionare il giusto alimentatore di sicurezza 12V DC ed evitare errori comuni che possono portare a tempi di fermo del sistema, danni alle apparecchiature o prestazioni inaffidabili.<\/div>\n<div>\n<h2><span class=\"ez-toc-section\" id=\"Understanding_Security_System_Power_Requirements\"><\/span>Comprensione dei requisiti di alimentazione del sistema di sicurezza<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div>Prima di selezionare un alimentatore di sicurezza, \u00e8 necessario capire quanta energia richiede effettivamente il sistema. Dispositivi di sicurezza come telecamere a circuito chiuso, lettori di schede, serrature elettriche e controller di controllo degli accessi hanno tutti diversi requisiti di tensione e corrente. Se si sceglie un alimentatore che non pu\u00f2 soddisfare queste esigenze, il sistema potrebbe verificarsi perdite di telecamere, risposte di blocco ritardate o persino danni permanenti alle apparecchiature.<br \/>\n\u00c8 necessario iniziare elencando ogni dispositivo nel sistema. Per ogni dispositivo, controllare la tensione nominale, la corrente nominale e il consumo energetico di picco. Queste informazioni si trovano solitamente sull 'etichetta del prodotto o nella scheda tecnica del produttore. Solo calcolando con precisione il carico totale \u00e8 possibile selezionare un alimentatore di sicurezza 12V DC che \u00e8 sicuro e affidabile.<br \/>\nUn altro punto importante \u00e8 che i sistemi di sicurezza funzionano spesso 24 ore al giorno. Ci\u00f2 significa che l'alimentatore deve essere in grado di funzionare continuamente senza surriscaldamento o guasti prematuri. Per questo motivo, la qualit\u00e0 e l'affidabilit\u00e0 dovrebbero sempre essere le priorit\u00e0 principali quando si confrontano le opzioni di alimentazione di sicurezza.<\/div>\n<div>\n<h2><span class=\"ez-toc-section\" id=\"How_to_Choose_the_Right_Security_Power_Supply\"><\/span>Come scegliere il giusto alimentatore di sicurezza<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Output_Voltage_and_Current_Requirements\"><\/span>Voltaggio di uscita e requisiti attuali<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>La maggior parte delle telecamere CCTV e dei dispositivi di controllo degli accessi funziona a 12 V DC, ma alcuni sistemi possono anche utilizzare 24 V DC o PoE. Per i sistemi di sicurezza a 12 V DC, l'alimentazione deve fornire un 'uscita stabile a 12 V in condizioni di carico variabili.<br \/>\n\u00c8 inoltre necessario controllare la corrente nominale. Se una fotocamera richiede 12V DC 1A, un alimentatore 12V 1A pu\u00f2 funzionare in condizioni ideali, ma lascia pochissimo margine di sicurezza. Per le installazioni del mondo reale, di solito \u00e8 meglio scegliere un alimentatore con una capacit\u00e0 di corrente superiore alla corrente nominale del dispositivo.<\/div>\n<div>\n<p><img decoding=\"async\" class=\"size-full wp-image-16440\" title=\"LRS 120\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/LRS-120.webp?quality=85&strip=all\" alt=\"LRS 120\" width=\"1000\" height=\"1000\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/LRS-120.webp?quality=85&strip=all 1000w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/LRS-120-300x300.webp?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/LRS-120-500x500.webp?quality=85&strip=all 500w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/LRS-120-768x768.webp?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/LRS-120-12x12.webp?quality=85&strip=all 12w\" sizes=\"(max-width: 1000px) 100vw, 1000px\" \/><\/p>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Total_System_Power_Consumption\"><\/span>Consumo energetico totale del sistema<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Per calcolare il consumo energetico totale del sistema, aggiungere i requisiti di alimentazione di tutti i dispositivi collegati. Ad esempio, se si dispone di quattro telecamere CCTV ciascuna che disegna 0,5 A a 12 V, il requisito di corrente totale \u00e8 2A. Se si collega anche un controller di accesso, una serratura elettrica e un lettore di schede, \u00e8 necessario includere anche tali carichi.<br \/>\nUn errore comune \u00e8 aggiungere solo la corrente nominale di ciascun dispositivo senza considerare la corrente di avvio, la perdita del cavo e l'espansione futura. ci\u00f2 pu\u00f2 comportare un alimentatore che funziona temporaneamente ma non funziona quando il sistema \u00e8 a pieno carico.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Capacity_Margin_and_Scalability\"><\/span>Margine di capacit\u00e0 e scalabilit\u00e0<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Un buon alimentatore di sicurezza non deve essere dimensionato esattamente al carico totale. Si dovrebbe sempre lasciare un margine di capacit\u00e0. Una raccomandazione generale \u00e8 quella di utilizzare non pi\u00f9 di 70% a 80% della capacit\u00e0 nominale dell 'alimentatore in funzionamento normale.<br \/>\nAd esempio, se il sistema richiede 4A a 12V, un alimentatore da 5A pu\u00f2 essere sufficiente, ma un alimentatore da 6A o 7A offrir\u00e0 una migliore affidabilit\u00e0 a lungo termine. Questa capacit\u00e0 aggiuntiva aiuta ad assorbire gli sbalzi di potenza imprevisti, riduce l'accumulo di calore e consente di aggiungere dispositivi in seguito senza sostituire l'intero alimentatore.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Compatibility_with_Security_Devices\"><\/span>Compatibilit\u00e0 con i dispositivi di sicurezza<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>La compatibilit\u00e0 \u00e8 un altro fattore critico. Non tutti gli alimentatori a 12V DC funzionano bene con ogni dispositivo di sicurezza. Alcuni dispositivi sono sensibili alle fluttuazioni di tensione, al rumore di ondulazione o alla polarit\u00e0 errata.<br \/>\nPer i sistemi CCTV e di controllo degli accessi, \u00e8 necessario cercare alimentatori con uscita stabile, protezione da sovracorrente, protezione da sovratensione e protezione da cortocircuito. queste caratteristiche riducono il rischio di danni a costose telecamere, controller e lettori.<br \/>\nQuando si acquista da <a href=\"https:\/\/www.wehopower.com\/it\/\" target=\"_blank\" rel=\"noopener\">WEHO<\/a>, Puoi specificare la tensione del sistema, il carico di corrente e i tipi di dispositivi e noi possiamo aiutarti a trovare un alimentatore di sicurezza a 12 V DC adatto che soddisfi sia i requisiti di prestazioni che di sicurezza.<\/div>\n<div>\n<h2><span class=\"ez-toc-section\" id=\"Centralized_Vs_Distributed_Power_Supply_for_Security_Systems\"><\/span>Centralizzato vs. distribuito <a href=\"https:\/\/www.wehopower.com\/it\/product-category\/security-power-supply\/\" target=\"_blank\" rel=\"noopener\">Alimentazione elettrica per sistemi di sicurezza<\/a><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div>Quando si progetta un sistema di sicurezza, \u00e8 inoltre necessario decidere tra un alimentatore centralizzato e un alimentatore distribuito. Ogni approccio presenta vantaggi e la scelta migliore dipende dalle dimensioni dell 'installazione, dalle distanze dei cavi e dai requisiti di manutenzione.<br \/>\nUn alimentatore centralizzato significa che pi\u00f9 dispositivi di sicurezza sono alimentati da un 'unica fonte di alimentazione principale. Questo \u00e8 comune nei sistemi pi\u00f9 piccoli o quando i dispositivi sono posizionati vicini. Pu\u00f2 semplificare l'installazione, ridurre il numero di alimentatori e rendere pi\u00f9 facile aggiungere alimentazione di backup.<br \/>\nUn alimentatore distribuito significa che i dispositivi o gruppi di dispositivi sono alimentati da alimentatori separati. Questo approccio \u00e8 spesso utilizzato in edifici pi\u00f9 grandi, installazioni a lunga distanza o sistemi in cui aree diverse richiedono una gestione indipendente dell 'alimentazione. Pu\u00f2 ridurre l'impatto di un singolo guasto all' alimentazione e ridurre il rischio di caduta di tensione CC su lunghe corse di cavi. La seguente tabella confronta i sistemi di alimentazione centralizzata e distribuita:<\/div>\n<div>\n<div>\n<div>\n<div aria-describedby=\"31q3t0u\"><\/div>\n<\/div>\n<\/div>\n<div>\n<div>\n<div>\n<div>\n<table>\n<thead>\n<tr>\n<th>Elemento di confronto<\/th>\n<th>Centralized Power Supply<\/th>\n<th>Distributed Power Supply<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td>Installation Cost<\/td>\n<td>Lower for small systems<\/td>\n<td>Higher for large systems<\/td>\n<\/tr>\n<tr>\n<td>Cable Requirement<\/td>\n<td>Longer cables may be needed<\/td>\n<td>Shorter cables per area<\/td>\n<\/tr>\n<tr>\n<td>Maintenance<\/td>\n<td>Easier to manage one unit<\/td>\n<td>Requires checking multiple units<\/td>\n<\/tr>\n<tr>\n<td>Ridondanza<\/td>\n<td>Depends on single power supply<\/td>\n<td>Better fault isolation<\/td>\n<\/tr>\n<tr>\n<td>Voltage Drop Risk<\/td>\n<td>Higher over long distances<\/td>\n<td>Lower in local areas<\/td>\n<\/tr>\n<tr>\n<td>Best For<\/td>\n<td>Small shops, offices, single buildings<\/td>\n<td>Large sites, factories, multi-area systems<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<\/div>\n<div>Before Installation, You Should Evaluate the Layout of Your Site, The Number of Cameras, And the Distance Between Devices. This Will Help You Choose the Most Efficient and Cost-Effective Power Distribution Method.<\/div>\n<div>\n<h2><span class=\"ez-toc-section\" id=\"Power_Supply_Considerations_for_CCTV_Systems\"><\/span>Considerazioni sull 'alimentazione per i sistemi CCTV<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img decoding=\"async\" class=\"alignnone size-large wp-image-16238\" title=\"12V DC power supply connection guide for CCTV security cameras\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/12V-DC-power-supply-connection-guide-for-CCTV-security-cameras-1024x683.png?quality=85&strip=all\" alt=\"12V DC power supply connection guide for CCTV security cameras\" width=\"750\" height=\"500\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/12V-DC-power-supply-connection-guide-for-CCTV-security-cameras-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/12V-DC-power-supply-connection-guide-for-CCTV-security-cameras-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/12V-DC-power-supply-connection-guide-for-CCTV-security-cameras-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/12V-DC-power-supply-connection-guide-for-CCTV-security-cameras-1536x1024.png?quality=85&strip=all 1536w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/12V-DC-power-supply-connection-guide-for-CCTV-security-cameras-2048x1365.png?quality=85&strip=all 2048w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/12V-DC-power-supply-connection-guide-for-CCTV-security-cameras-18x12.png?quality=85&strip=all 18w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/12V-DC-power-supply-connection-guide-for-CCTV-security-cameras-1568x1045.png?quality=85&strip=all 1568w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/p>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"PoE_vs_Non-PoE_Cameras\"><\/span>Fotocamere PoE e non PoE<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>CCTV Cameras Can Be Powered in Different Ways. PoE Cameras Receive Both Data and Power Through a Single Network Cable, Which Can Simplify Installation in IP-Based Surveillance Systems. Non-PoE Cameras Require\u00a0 Separate <a href=\"https:\/\/www.wehopower.com\/it\/product_category\/enclosed-switching-power-supply\/\" target=\"_blank\" rel=\"noopener\">alimentatori<\/a> for non-PoE CCTV cameras.<br \/>\nPoE Is Convenient When You Already Have a Network Infrastructure in Place. It Reduces the Need for Separate Power Adapters and Can Make Cable Management Cleaner. However, Not All CCTV Cameras Support PoE, And PoE Switches or Injectors Must Be Properly Sized to Handle the Total Power Load.<br \/>\nNon-PoE Cameras Often Rely on 12V DC Power Supplies. These Are Widely Used in Analog Cameras, HD Analog Cameras, And Some Older Surveillance Systems. For Non-PoE Installations, A Reliable 12V DC Security Power Supply Is Essential to Maintain Stable Camera Performance.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"IR_Night_Vision_Power_Requirements\"><\/span>IR Night Vision Requisiti di potenza<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Many CCTV Cameras Include Infrared Night Vision. IR LEDs Consume Additional Power, Especially When the Camera Switches to Night Mode. This Means the Actual Power Demand May Be Higher Than the Daytime Rating.<br \/>\nWhen Selecting a Power Supply for IR Cameras, You Should Check Both the Daytime Current and the Night Vision Current. If You Only Use the Daytime Rating, The Power Supply May Be Undersized, Causing the Camera to Shut down or Produce Poor-Quality Night Images.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"PTZ_Camera_Startup_Power\"><\/span>Fotocamera di avvio PTZ Startup Power<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>PTZ Cameras Are Another Special Case. These Cameras Have Moving Parts, Motors, And Sometimes Heaters or Fans. When a PTZ Camera Starts up or Moves, It May Draw a Higher Current Than Its Normal Operating Current.<br \/>\nThis Startup Current Is an Important Consideration. If the Power Supply Cannot Handle the Temporary Peak Current, The Camera May Reset, Stop Responding, Or Fail to Complete Its Movement Commands. For PTZ Cameras, You Should Always Refer to the inrush and peak startup current , Not Just the Average Current.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Long_Cable_Voltage_Drop\"><\/span>Lunghezza del cavo Voltage Drop<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Long Cables Can Cause Voltage Drop. When Electricity Travels Through a Cable, Some Voltage Is Lost Due to Cable Resistance. This Means a 12V Power Supply at the Source May Deliver Less Than 12V at the Camera End.<br \/>\nVoltage Drop Can Cause Camera Instability, Dim IR Illumination, Or Even Complete Signal Loss. To Avoid This Problem, You Should Use Appropriate Cable Sizes, Keep Cable Lengths Within Reasonable Limits, Or Install Local Power Supplies for Devices Located Far from the Main Panel.<br \/>\nFor Longer Runs, You May Also Consider a 24V AC or 24V DC Power Supply, As Higher Voltage Can Reduce the Relative Impact of Voltage Drop. However, If Your Devices Require 12V DC, You Must Ensure the Final Voltage at the Camera Remains Within the Acceptable Range.<\/div>\n<div>\n<h2><span class=\"ez-toc-section\" id=\"Power_Supply_Requirements_for_Access_Control_Systems\"><\/span>Requisiti di alimentazione per i sistemi di controllo degli accessi<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-large wp-image-16239\" title=\"Access control system power supply setup with electric lock, reader and controller\" src=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Access-control-system-power-supply-setup-with-electric-lock-reader-and-controller-1024x683.png?quality=85&strip=all\" alt=\"Access control system power supply setup with electric lock, reader and controller\" width=\"750\" height=\"500\" srcset=\"https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Access-control-system-power-supply-setup-with-electric-lock-reader-and-controller-1024x683.png?quality=85&strip=all 1024w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Access-control-system-power-supply-setup-with-electric-lock-reader-and-controller-300x200.png?quality=85&strip=all 300w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Access-control-system-power-supply-setup-with-electric-lock-reader-and-controller-768x512.png?quality=85&strip=all 768w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Access-control-system-power-supply-setup-with-electric-lock-reader-and-controller-18x12.png?quality=85&strip=all 18w, https:\/\/i1.wp.com\/www.wehopower.com\/wp-content\/uploads\/2026\/08\/Access-control-system-power-supply-setup-with-electric-lock-reader-and-controller.png?quality=85&strip=all 1248w\" sizes=\"(max-width: 750px) 100vw, 750px\" \/><\/p>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Electric_Locks\"><\/span>Serrature elettriche<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Access Control Systems Also Have Specific Power Supply Requirements. Electric Locks, In Particular, Can Draw a Significant Amount of Current When They Unlock. Some Locks Only Require a Short Burst of Current, While Others Need Continuous Power to Remain Locked or Unlocked.<br \/>\nYou Need to Know Whether Your Lock Is Fail-Safe or Fail-Secure. Fail-Safe Locks Usually Remain Unlocked When Power Is Removed, While Fail-Secure Locks Remain Locked. This Difference Affects Both Power Supply Design and Safety Planning.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Card_Readers\"><\/span>Lettori Card<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Card Readers Are Usually Low-Current Devices, But They Still Require Stable Power. If the Power Supply Is Unstable, The Reader May Fail to Authenticate Cards, Display Errors, Or Disconnect from the Access Control System.<br \/>\nAlthough Card Readers Do Not Consume Much Power, They Should Not Be Connected to an Overloaded Circuit. Even Small Devices Can Be Affected by Voltage Fluctuations Caused by Other Equipment on the Same Power Line.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Controllers\"><\/span>Controllori<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Access Control Controllers Are the Central Processing Units of the System. They Manage Readers, Locks, And Communication with the Server. If the Controller Loses Power, The Entire Access System May Stop Working.<br \/>\nFor This Reason, Controllers Should Be Connected to a Reliable Power Supply. In Many Installations, They Are Also Connected to Backup Power to Ensure Continuous Operation During Mains Power Failure.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Backup_Power_Requirements\"><\/span>Requisiti di potenza di backup<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Backup Power Is Especially Important for Access Control Systems. When the Main Power Fails, Doors Should Still Operate in a Predictable Way, And Security Should Not Be Compromised. You Can Use UPS Units, Backup Batteries, Or Standby Power Supplies to Maintain Operation During Short or Extended Power Outages. The Choice Depends on the Required Backup Time, The Number of Devices, And the Level of Security the Site Requires.<br \/>\nAt WEHO, We Can Help You Design a 12V DC Security Power Supply System That Includes Both Primary Power and Backup Power Planning, So Your Access Control System Remains Reliable Even When Mains Power Is Interrupted.<\/div>\n<div>\n<h2><span class=\"ez-toc-section\" id=\"Common_Security_Power_Supply_Selection_Mistakes\"><\/span>Errori comuni di selezione dell 'alimentatore di sicurezza<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Undersized_Power_Supply_Capacity\"><\/span>Capacit\u00e0 di alimentazione elettrica sottodimensionata<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>One of the Most Common Mistakes Is Choosing an Undersized Power Supply. Many Buyers Only Look at the Rated Voltage and Ignore the Current Capacity. This Can Lead to Overheating, Poor Performance, And Shortened Equipment Life.<br \/>\nA Power Supply That Runs at or near Its Maximum Rating Will Generate More Heat and Fail Earlier. It May Also Cause Voltage Instability When Additional Devices Are Connected or When Existing Devices Draw Peak Current.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Ignoring_Startup_Current\"><\/span>Attenzione alla startup current<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Another Mistake Is Ignoring Startup Current. Devices Such as PTZ Cameras, Electric Locks, And Motors Often Draw More Current During Startup Than During Normal Operation. If the Power Supply Cannot Handle This Peak, The System May Fail Unexpectedly.<br \/>\nWhen Selecting a Security Power Supply, Always Check for Startup Current, Inrush Current, Or Peak Current in the Device Specifications. These Values Are Often More Important Than the Normal Operating Current.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"No_Backup_Power_Planning\"><\/span>Nessuna pianificazione del potere di backup<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Many Security System Designs Only Consider Mains Power. However, Real-World Reliability Requires Backup Power Planning. If a Power Failure Occurs, CCTV Cameras Should Continue Recording, And Access Control Doors Should Behave According to the Site\u2019s Safety Policy.<br \/>\nWithout Backup Power, A Security System Can Become Useless During Critical Moments. This Is Why You Should Include UPS, Batteries, Or Backup Power Supplies in Your Initial Design, Not as an Afterthought.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Choosing_Incompatible_Voltage_Ratings\"><\/span>Scelta di valori di tensione incompatibili<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Choosing the Wrong Voltage Rating Is Another Serious Mistake. A 24V Power Supply Connected to a 12V Device Can Damage the Equipment. A 12V Power Supply Connected to a 24V Device Will Usually Cause the Device to Malfunction or Not Work at All.<br \/>\nBefore Purchasing, Confirm the Voltage Requirement of Every Device in the System. If Possible, Standardize on One Voltage Level to Simplify Purchasing, Installation, And Maintenance. For Many CCTV and Access Control Installations, A 12V DC Security Power Supply Remains the Most Practical Choice.<\/div>\n<div>\n<h2><span class=\"ez-toc-section\" id=\"FAQs\"><\/span>Domande frequenti<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"What_Power_Supply_is_Best_for_CCTV_Cameras\"><\/span>Quale alimentatore \u00e8 il migliore per le telecamere CCTV?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>The Best Power Supply for CCTV Cameras Depends on the Camera Type, Voltage Requirement, And Total Power Load. For 12V DC Cameras, A Stable 12V Power Supply with Sufficient Current Capacity and Built-In Protection Features Is Usually the Best Choice. PoE Cameras Require a PoE Switch or PoE Injector That Can Deliver Enough Power per Port.<br \/>\nIf You Are Using Multiple Cameras, You Should Calculate the Total Current Requirement and Add a Safety Margin. For Professional Installations, Quality 12V DC Power Supplies from Trusted Manufacturers Are Generally More Reliable Than Low-Cost Adapters.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"How_Much_Power_Does_a_Security_Camera_System_Need\"><\/span>Quanta potenza ha bisogno di un sistema di telecamere di sicurezza?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>The Power Requirement of a Security Camera System Depends on the Number of Cameras, Camera Types, IR LEDs, PTZ Motors, And Additional Accessories. A Single Basic 12V DC Camera May Require Around 0.5A to 1A, While a PTZ Camera with IR Night Vision May Require 2A or More During Peak Operation.<br \/>\nTo Get an Accurate Figure, You Should List All Devices, Check Their Datasheets, And Sum Their Rated Current. Then Add a Capacity Margin of 20% to 30% for Safety and Future Expansion.<\/div>\n<div>\n<h3><span class=\"ez-toc-section\" id=\"Do_Access_Control_Systems_Need_Backup_Power\"><\/span>I sistemi di controllo degli accessi hanno bisogno di alimentazione di backup?<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<\/div>\n<div>Yes, Access Control Systems Generally Need Backup Power. When Mains Power Fails, Electric Locks, Controllers, And Card Readers Must Continue to Operate in a Safe and Predictable Manner. Without Backup Power, Doors May Become Unresponsive, And the Site May Lose Access Control.<br \/>\nThe Exact Backup Power Solution Depends on the Installation. For Some Sites, A Short-Duration UPS May Be Enough. For Others, Longer Battery Backup or Standby Power Supplies Are Required.<\/div>\n<div>\n<h2><span class=\"ez-toc-section\" id=\"_Conclusion\"><\/span>\u00a0Conclusione<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div>A Reliable Security System Begins with a Reliable Security Power Supply. Whether You Are Installing CCTV Cameras, Access Control Readers, Electric Locks, Or Controllers, The Quality of Your 12V DC Power Supply Will Directly Affect System Stability, Equipment Lifespan, And Overall Security Performance.<br \/>\nYou Should Calculate Total Power Consumption Correctly, Leave Enough Capacity Margin, Consider Startup Current, Plan for Backup Power, And Avoid Common Mistakes Such as Undersizing or Voltage Incompatibility. A Well-Designed Power Supply System Will Not Only Prevent Unexpected Failures but Also Reduce Long-Term Maintenance Costs.<br \/>\nIf You Want to Build a More Reliable CCTV and Access Control System, Start with the Right WEHO 12V DC power solutions for CCTV and access control. <a href=\"https:\/\/www.wehopower.com\/it\/contact\/\" target=\"_blank\" rel=\"noopener\">Contact WEHO Today<\/a> to Discuss Your Requirements, And Let Us Help You Select a Power Supply Solution That Matches Your Equipment, Site Layout, And Budget.<\/div>","protected":false},"excerpt":{"rendered":"<p>Introduction Choosing the Right Security Power Supply Is One of the Most Important Decisions You Will Make When Designing a Reliable CCTV or Access Control System. A Stable 12V DC security power supply Ensures That Cameras, Readers, Locks, And Controllers Operate Consistently, Even Under Long-Term Use or Unexpected Power Interruptions. In This Guide, You Will&hellip; <a class=\"more-link\" href=\"https:\/\/www.wehopower.com\/it\/news\/security-power-supply-guide-for-cctv-and-access-control-systems\/\">Continua a leggere <span class=\"screen-reader-text\">Guida all 'alimentazione di sicurezza per CCTV e sistemi di controllo degli accessi<\/span><\/a><\/p>","protected":false},"author":4,"featured_media":16241,"parent":0,"menu_order":214,"comment_status":"closed","ping_status":"closed","template":"","format":"standard","meta":{"_acf_changed":false,"_joinchat":[],"footnotes":""},"news_category":[149,148],"class_list":["post-16229","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\/it\/wp-json\/wp\/v2\/news\/16229","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\/4"}],"replies":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/comments?post=16229"}],"version-history":[{"count":8,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news\/16229\/revisions"}],"predecessor-version":[{"id":16441,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news\/16229\/revisions\/16441"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/media\/16241"}],"wp:attachment":[{"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/media?parent=16229"}],"wp:term":[{"taxonomy":"news_category","embeddable":true,"href":"https:\/\/www.wehopower.com\/it\/wp-json\/wp\/v2\/news_category?post=16229"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}