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Electrical Time Switches, Timers & Control Relays

ABB THERMISTOR MOTOR PROTECTION RELAY CONTROL 24-240VAC 1NO+1NC CM-MSS.11S

Product Code: CM-MSS.11S

The Thermistor Motor Protection Relay is designed to monitor PTC temperature sensors using one sensor circuit. It features dynamic interrupted wire detection and non-volatile fault storage. The relay operates based on the closed-circuit principle and has three LEDs for visual indication. With a rated control supply voltage of 24 to 240 V AC/DC, this relay is versatile in its power requirements. It also includes 1 normally open (NO) and 1 normally closed (NC) output contact, both rated at 250 V / 4 A. The relay continuously monitors for interrupted wires and will automatically reset once the failure has been resolved. For easy installation, the relay is equipped with double-chamber cage connection terminals.

Technical Specifications

Brand ABB
Connection Type Double-chamber cage connection terminals
Contacts 1NO + 1NC
Degree of Protection IP50 (Housing), IP20 (Terminals)
Dimensions (mm) 97W x 109H x 30D
Duty Time 100%
Function Dynamic interrupted wire detection, Non-volatile fault storage
LED Colour U: Green, F: Red, R: Yellow
Mounting Type DIN Rail
No. of LED 3
Operational Temperature Range (°C) -25 to +60
Overvoltage Category III
Pollution Degree 3
Rated Control Supply Voltage AC/DC (V) 24 - 240
Rated Current (A) 4
Rated Frequency (Hz) 15-400
Rated Impulse Withstand Voltage (kV) 4
Reference No. 1SVR730720R1400
Sensor Type PTC Type A
Standards and Approvals CAN/CSA C22.2 No.14, EN 50495, IEC/EN 63000, IEC/EN 60079-7, IEC/EN 60947-5-1, IEC/EN 60947-8, UL 508
Storage Temperature (°C) -40 to +85
Terminal Type Screw
Weight (kg) 0.127

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