The Ajax 12V PSU is a specialized power supply board designed to allow the Hub, Hub Plus, and ReX range extender to operate using a low-voltage power source. By replacing the standard power supply board inside the device enclosure, you can integrate your security system into an external power circuit with an input voltage ranging from 8 to 20 V DC and a current of up to 1 A. This compact module measures 138 × 64 × 13 mm and weighs only 30 g, ensuring it fits seamlessly within the original housing. It converts the incoming power to a stable output of 4.65 V DC with up to 1.5 A, utilizing a 5.5 × 2.1 mm male connector and a 6.5 × 2 mm female jack for secure connections. The board is built to function reliably in temperatures between -10°C and +40°C and humidity levels up to 75%, making it suitable for various installation environments. Along with the PSU board, the package includes a terminal adapter and a quick start guide to help you get the system powered up quickly.