ABB RB121PG-5VDC Interface relay R600 1We,A1-A2=5VDC,250V/3mA-6A 1SNA645036R2500

In today's industrial automation systems, programmable logic controllers (PLCs) play a central role. They connect measuring instruments and actuators linked via conventional wiring to the process. However, a PLC is not completely decoupled from the industrial environment, meaning that voltage spikes and inrush currents can indeed affect its functionality. Therefore, to adjust the applied voltage and/or current and to provide the PLC with suitable galvanic isolation, the appropriate interface should be installed for each input/output point, which regulates both the voltage and current levels while offering isolation protection. Such interfaces are provided by ABB's relay and optocoupler series. They allow for a wide range of voltage adjustment (from 5 to 250 V) and current adjustment (from 0.01 to 8 A), as well as high isolation between input and output of 2 to 4 kV. For high switching frequencies with low switching loads, transistor, MOSFET, or triac outputs can be selected as options.