Circuit relay output module plc

Relay output module plc circuit, the internal iron 1.4016 steel 2r of the relay coil is energized, its normally open contacts closed, the external load electrical work. Meanwhile relay power from the isolation and amplification, each way just to provide users with a pair of stainless steel coils open contacts. With contacts parallel RC circuit and varistor to eliminate Tun arc generated when the contact is opened, in order to reduce the interference of its CPU.