A sealed contact relay for use in industrial control systems includes a solid state digital programmable timer which controls the operation of a timed relay coil. An instantaneous relay coil is also included and each of the coils operates two sealed contact switches which are contained in field replaceable cartridges. A timing light indicates the state of the timed relay coil and it blinks while the digital programmable timer is timing. The timer mode and the duration of the timed interval are selected by placing a uniquely molded insert into a four-pole switch receptacle.
There is provided a relay module including: a power lead part connected to a power source; a connector lead part connected to a load; a relay switch interposed between the power lead part and the connector lead part, and electrically connected thereto; a control member for controlling the relay switch; and a molded part sealing at least ends of the power lead part and the connector lead part near the control member, the relay switch, and the control member.
