The Siemens 3RN1010-2CM00 is a thermistor motor protection evaluation unit designed to monitor motor winding temperature via PTC thermistors. It operates on 230 V AC at both 50 and 60 Hz, with a single-pole normally-open and single-pole normally-closed auxiliary contact set. The unit is housed in a 22.5 mm wide enclosure rated IP20, mounts via screw or snap-on, and uses spring-loaded terminals for the auxiliary and control circuit connections.
Mounting & Connections
The 22.5 mm width fits standard DIN-rail enclosures; the screw and snap-on fastening method lets you clip it onto the rail or bolt it to a backplate.
IP20 protection means it's suitable for clean, dry control cabinets — no washdown or dust ingress tolerance. The substance prohibitance date of 05/28/2009 indicates RoHS compliance for that EU directive version.