Phoenix Contact offers rugged Industrial Relays with a lockable manual test button for universal use with a screw spring-cage connection. General Purpose Industrial Relay modules typically consist of of a relay base, a plug-in industrial relay, a plug-in interference suppression module (AC types only), and a relay retaining bracket with eject function. Relays may include a status LED and, in the DC version, a freewheeling diode. The 4 PDT versions feature hard gold-plated contacts to allow even small signals from 1 V/1 mA to be switched without issues. Phoenix Contact's General Purpose Industrial Relays meet the requirements of today's control cabinet designs with clear isolation of control signals and load.