When making automatic electrical control cabinet, PLC control load will add small central relay. Now industrial automation has developed towards integration, and relay module has been developed. PLC can directly control the coil of relay module, and the corner contact of relay module can control the load. The advantage is that the volume of relay module is small, It only accounts for 1 / 2 of the volume of the small central relay, and the contact current is larger than that of the small relay, generally 10a, 12a, 16a, 30a, with varistor. When the relay is disconnected, the spark plays the role of arc extinguishing, and the service life of the forward relay is longer.
Module relay is more than two electronic relays installed on a circuit board, the input and output are led to the terminal through the circuit. It is usually used to replace the central relay. The relay module is composed of relay, relay seat, light-emitting diode, voltage stabilizing diode and current limiting device
Module relay is more than two electronic relays installed on a circuit board, the input and output are led to the terminal through the circuit. It is usually used to replace the central relay. The relay module is composed of relay, relay seat, light-emitting diode, voltage stabilizing diode, current limiting group, varistor, input and output terminals, PCB board and rail device seat.