The common misapprehension with most Installers is that a power supply is simply just another component part of a security system, however it is the most important part! If it does not work correctly or fails to perform to its specification, then the whole system will fail. Working out what power supply you need doesn’t need to be a daunting task. This blog will explore power supply units within access control systems with the aim of helping you to select the right unit and Amperage for your requirements. There are a range of different power supplies in the market with most Access Control systems using 12V DC PSUs, but there are a lot of systems/products that can run on 24V DC including Fire Alarms, CCTV and Entry systems and so specifying the correct product is essential at the time of design.