Using Sensors; Operator Control; Operator Controls And Display Elements - Siemens 3RS2 Manual

Digital devices

5.10 Operator control

5.9

Using sensors

• NTC sensors: The following types of NTC sensor are supported: B57227-K333-A1 (100 °C:
1.8 kΩ; 25 °C: 32.762 kΩ).
• Thermocouples: You can use the following types of thermocouple with the digital devices:
E, J, K, R, S, T, B, N.
• Resistance sensors: When using the digital device together with the sensor expansion
module, as many as three resistance sensors of types Pt100, Pt1000 or KTY can be
monitored.
When using the digital device together with the sensor expansion module, the following sensors
can be used:
• As many as three resistance sensors of types Pt100, Pt1000 or KTY.
• Up to three NTC sensors.
Note
Sensor type
A device can only be used to monitor sensors of the same type.
Note
Using the current input 4 ... 20 mA
If you use the 4 ... 20 mA current input (selectable via the operating menu), all other sensor
inputs are inactive.
5.10 Operator control
5.10.1

Operator controls and display elements

The digitally adjustable monitoring relays are equipped on the front with the following operator
controls and display elements:
34
3RS2 temperature monitoring relay
Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002