Voltage: 20÷30VDC. Power supply output: 4x0,5Amp. Number of inputs/outputs: 1/4. Control input: INPUT – parametric (2x4,7k?). Protections: OLP*. Technical outputs – relay: PSU – parametric input failure INPUT. LED indication. Mounting options: tapping screws x 2. Dimensions: L=150 W=52,5 H=27 [+/-2mm]. Notes: dedicated for power supplies of EN54C / EN54M, sequentially switching of receivers, with a delay of 100 ms.