ABB 1SVR405541R3210 4 Channel Safety Relay Module

ABB 1SVR405541R3210 is a pluggable CR-S interface relay (variant CR-S024VADC1CRZ) with a single SPDT contact (1 C/O) and a 24 V coil that can be driven from AC or DC supplies. It is designed for DIN rail mounting and ships as a plug‑in unit with its own socket and marker, mirroring ABB’s modular CR‑S safety/interface relay family. The contact is rated to switch up to 6 A at 250 V, with a 1C/NO/NC arrangement that supports straightforward wiring of safety devices and control circuits. The 24 V coil (A1–A2) accommodates common automation power rails and allows both AC and DC drive, enabling flexible integration with 24 V safety circuits and PLC inputs. The compact form factor and plug‑in design simplify replacement and maintenance in panel layouts where space is at a premium. Typical applications include interfacing emergency stop devices, safety interlocks, and other safety‑related components to a PLC or automation controller, where a reliable dry contact output is required. This product is part of ABB’s CR‑S series, widely cataloged and supported across ABB distributors, with the 1SVR405541R3210 serving as the 24 V coil variant of the single‑channel interface relay family.