ABB – 1SVR730100R0300 – CT‑ERS.21S On‑Delay Timer Relay, 24–240 VAC/DC

The ABB 1SVR730100R0300 (CT‑ERS.21S) is a single-function ON-delay electronic timer from the CT‑S range. Compact and DIN-rail mountable, it features adjustable time delay ranges, dual SPDT contacts, and a universal control voltage—ideal for industrial automation and sequence control applications.

Key Specifications:

• Model / Part Number: CT‑ERS.21S / 1SVR730100R0300  

• Function: ON-delay timer (delay on make), single-function  

• Control Voltage: 24–240 VAC/DC, 50/60 Hz  

• Time Range: 0.05 s to 300 h, selectable across 10 ranges  

• Outputs: 2 × SPDT (2 change-over) relay contacts, 4 A @ 250 VAC / 4 A @ 24 VDC  

• Terminal Type: Screw-type terminals (Cage)  

• Dimensions: 22.5 mm width; 85.6 × 103.7 mm overall  

• Housing: DIN-rail (IEC 60715), IP50/IP20 rated  

• Indicators: Dual front LEDs for supply/timing and output status  

• Certifications: IEC 61812‑1, UL 508, CSA, GL, CE, CCC, RoHS