The CM-MSS.21S Belongs To The CM-MSS Thermistor Motor Protection Relay Range. It Operates With A Rated Control Supply Voltage Of 24 – 240 V AC / DC And Has A 1 N/C + 1 N/O (SPDT) Output With Contacts Rated At 250 V / 4 A. It Features One Sensor Circuit To Monitor PTC Temperature Sensors And Works According To The Closed-Circuit Principle. The Sensor Circuit Of The CM-MSS.21S Is Short-Circuit, As Well As Interrupted-Wire Monitored And The Relay Will Be Reset Automatically After The Failure Has Been Removed. This Protection Relay Is Certified According To The ATEX Directive 94/9/EC. A Sealable Transparent Cover For Protection Against Unauthorized Changes Is Available As Accessory. The Device Offers Screw Connection Technology With Double-Chamber Cage Connection Terminals.

• · Thermistor Motor Protection Relays