Limit-Value Switch for Temperature Thermistor Input (NTC) Easy to use Switch limit value can be adjusted using drum scale Seal feature for drum scale Meets high EMC-requirements Floating output contact Short circuit monitoring of input signal Broken-wire monitoring of input signal Thermoplastic housing (Makrolon 2805) Matching temperature sensors can be supplied Suitable for harsh operating conditions Compact design for mounting side by side Limit-Value Switch RH41M... The RH41M limit-value switch is a specially designed product for monitoring maximum temperatures in engine safety systems with a monitored open circuit arrangement. The monitored open circuit arrangement increases the availability of a system without eliminating self-monitoring of the closed circuit system in the event of a wire break and short circuit. The signal for constantly checking the functional reliability of the temperature sensor, sensor line, auxiliary voltage, relay and signal line can be evaluated separately from the temperature signal. The device is used on a TS 32 mounting rail in the same way as a snap-on terminal. It is a special type of modular terminal block with an integrated electronic measuring and switching stage. Multiple modular switching devices can be connected side by side on a rail to save space and can also be combined with modular terminal blocks. The required switching temperature can be set on a dial. The device design also envisages use in harsh/low environments in machinery applications. To enable line monitoring, the devices at connections 3 and 7 must be provided with a transition resistor. A value of 22 kΩ is quite common, but other values are possible and the resistor can also be connected by the customer. The resistance value must be based on the requirements of the monitoring system. The resistance value is identified by means of an addition to the type designation. Bipolar wiring is used between the measuring element and the switching device. With a line length of up to 20 m, the faults specified in this data sheet will not be exceeded. If greater distances need to be covered, slightly larger faults may occur that are dependent on both the line length and the selected switch point. The polarity is irrelevant when connecting the connecting line. Shielded lines must be used. A distance of at least 0.1 m is to be observed in relation to power lines. No line compensation has to be performed; no compensating line and reference point are required. All connections to the switching device must be established using A 6.3 x 0.8 Faston connectors according to DIN 46245 (AMP connectors, etc.). The Faston connectors are included in the scope of supply.

Technical Data Dimensions, Connection, Diagram drum scale f Flat connector plug A6.3 x 0.8 DIN 46244 with insulating sleeve in accessories kit Capstan head screw —i according to DIN 404 Switching state Connection Signal at output 4/6 (Contact position and internal resistance,,R" with various operating states) Deliverable versions and ordering information Type 11 Transition resistor R specified and connected by user. NORIS Automation GmbH | Muggenhofer Strasse 95 | 90429 Nuremberg | Germany | Phone: +49 911 3201-220 | Fax: +49 911 3201-150 | [email protected] | www.noris-group.com valid from...