Siemens SIRIUS 3SK1 Expansion Module Safety Relay, 24V dc, Single Channel, 0 Safety Contacts - 3SK1220-1AB40

The Siemens 3SK1 series 24V dc safety relay input expansion. It has advanced Input expansion for an additional 2-channel or two 1-channel sensors.Degree of pollution 3 Protection class IP20 Ambient temperature during storage -40°C to +80°C