The ABB CT‑ARS.S is a single-function electronic off-delay (delay-on-break) timer from ABB’s CT-S series. It operates over a wide voltage range of – VAC/DC, offers ten timing ranges from . s to  h, and provides changeover (SPDT) relay outputs rated at  A @  VAC. Ideal for industrial control panels requiring delayed shutdown sequences.

Key Features & Specifications

Model / P/N: CT‑ARS.S / SVRR
Function: Off‑delay timer (delay starts after control voltage is removed)
Control Voltage: – V AC or DC
Time Ranges: Selectable steps from . s to  h
Outputs: × SPDT ( CO each);  A resistive @  VAC ( A inductive)
Indicators: LEDs indicate “U/T” (power/timing) and “R” (relay status)
Connections: Screw terminals with double-chamber cage clamp (UL/CSA rated)
Dimensions: . × . × . mm (W×H×D); . kg net
Certifications: CE, UL , CSA C. No., GL, GOST, CCC, RoHS
Durability: , electrical cycles; million mechanical cycles

ABB – CT-ARS.21S (1SVR730120R3300) – Electronic Off-Delay Timer Relay