ABB – CM-SRS.11 (1SVR430841R0200) – Current Monitoring Relay, 3–30mA/10–100mA

The ABB CM-SRS.11 (1SVR430841R0200) is a single-phase current monitoring relay designed for precise overcurrent or undercurrent detection in both AC and DC circuits. It operates with a wide control supply voltage of 24–240 V AC/DC and features a single changeover (SPDT) output contact rated at 250 V / 4 A. The relay offers three selectable measuring ranges—3–30 mA, 10–100 mA, and 0.1–1 A—using a true RMS (TRMS) measuring principle for accurate current monitoring, regardless of waveform.

The device is configurable for either overcurrent or undercurrent monitoring, with an adjustable hysteresis from 3% to 30% of the threshold value. It features front-accessible controls for precise adjustment and three status LEDs for clear operational indication. The compact 22.5 mm housing is DIN rail mountable and offers high fire protection (UL 94 V-0). The relay works according to the open-circuit principle and is suitable for industrial automation, process control, and equipment protection.

Key Features:

• Wide supply voltage: 24–240 V AC/DC

• Three measuring ranges: 3–30 mA, 10–100 mA, 0.1–1 A (AC/DC, TRMS)

• Configurable for overcurrent or undercurrent monitoring

• Adjustable hysteresis: 3–30% of threshold

• Output: 1 SPDT (changeover) contact, 250 V / 4 A

• Status LEDs for operational indication

• DIN rail mounting: 22.5 mm wide

• Front-accessible controls for easy configuration

• High fire protection: Housing material UL 94 V-0

• Degree of protection: IP50 (housing), IP20 (terminals)

• Mechanical lifetime: 30 million cycles

• Electrical lifetime: 100,000 cycles (AC-12, 230 V, 4 A)

• Tool-free mounting and demounting