ABB 1SVR730100R0300 Industrial Safety Relay Module

ABB 1SVR730100R0300 CT-ERS.21S Time Delay Relay from ABB's 1SVR family provides two SPDT contacts (two Form C outputs) for timing-control tasks in industrial panels. The module accepts a wide supply range of 24–240 V AC or DC and features a timing range from 0.05 seconds to 300 hours, enabling both short-delay and long-delay applications in sequencing, interlocking, or delayed actuation. The compact device is designed for DIN rail mounting and is packaged in an IP20-rated enclosure for indoor control cabinets. The 1SVR730100R0300 part number identifies this specific CT-ERS.21S configuration within ABB's timer-relay lineup. Typical uses include implementing precise delays between sensors and actuators, coordinating control logic in automated processes, and creating staggered start/stop sequences in machinery. The timer's wide voltage tolerance and dual-changeover outputs make it suitable for interfacing simple sensors to actuators or alarms in compact control panels.