Siemens 3RP1531-1AP30 Timing Relay Timer Module

Siemens 3RP1531-1AP30 is a compact electronic timing relay from the SIRIUS 3RP15 family, designed as an off-delay timer with one SPDT output for precise sequencing in control circuits. It delivers a timing window of 0.5 to 10 seconds once energized and includes an LED indicator to confirm timing status, making it easy to troubleshoot in panel installations. The module supports multiple supply voltages—AC 24 V, DC 24 V, and AC 200–240 V—allowing integration with a range of control signals and simplifying wiring in mixed-voltage environments. Housed in an IP20-rated industrial enclosure with screw terminals for reliable field wiring, the unit provides a single changeover contact suitable for simple on/off control and sequencing tasks such as conveyor timing, machine startup delays, and interlock safety logic. Note that 3RP1531-1AP30 is listed as a phased-out model by Siemens, commonly replaced by newer 3RP15 timing relays in current catalogues, but it remains encountered in legacy equipment and compatible with a wide range of automation schemes requiring short OFF-delay timing.