Siemens – 3RS1101‑1CD40 – SIRIUS Temperature Monitoring Relay Ktype Thermocouple

The Siemens 3RS1101‑1CD40 (SIRIUS series) is a compact temperature monitoring relay designed for industrial use with K‑type thermocouples. It provides an overshoot alarm with one adjustable threshold, helping protect equipment against overheating or unexpected temperature spikes.

Key Features & Technical Specifications:

• Model: 3RS1101‑1CD40, SIRIUS temperature monitoring relay  

• Sensor Input: K‑type thermocouple; measuring range 500 °C to 1 000 °C  

• Functionality: Single threshold overshoot detection (one adjustable alarm setpoint)

• Supply Voltage: 24 V AC/DC (50/60 Hz)  

• Relay Outputs: 1 NO + 1 NC contact, via screw terminals; includes plug-in socket  

• Dimensions: 22.5 mm width, 102 × 22.5 × 91 mm (H × W × D); DIN‑rail mountable  

• Operating Temperature: –25 °C to +60 °C