The ABS-2 semiconductor interfaces are compact modules of the same design as the ABR-2 electromechanical devices. They serve as an interface in an automation system and enable the exchange of binary digital control signals between a process controller (PLC, numerical controller, etc.) and the other devices (contactors, solenoid valves, LEDs, proximity switches, etc.). Semiconductor interfaces are used in systems that are particularly dependent on the advantages of electronic devices: high switching frequency, virtually unlimited service life, hum-free operation, etc. Semiconductor interfaces are characterized by their high quality and perfect adaptability to industrial environmental conditions in accordance with the requirements of IEC standards.