Siemens 3RS2

• Selection measuring circuit 1 (ϑ1)
• Selection measuring circuit 2 (ϑ2)
• DEV.MODE: Operating mode selection. You can select from the following operating modes:
– Standard (default setting): Mode that enables you to con󹪝gure the device with an
unlimited combination of parameters and set values
– ATEX (ATEX-certi󹪝ed mode)
– TW (temperature monitor)
– TB (temperature limiter)
• DELAY: Operating delay time: On overshooting/undershooting the set temperature, the trip
delay time starts running. As soon as this time has elapsed, the output relay changes its
status. This function is deactivated for TW, TB and ATEX.
– o󹪜
– 0.1 ... 999 s
• ONDELAY: ON-delay time: The device starts after restart and reset and after expiration of the
selected ON-delay time.
– o󹪜 (default setting)
– 0.1 ... 999 s
• HYST: Hysteresis: Setting of the temperature at which the output relay of the sensor switches
to the original state, as soon as the temperature overshoots or undershoots the set hysteresis
value.
– Temperature: 1 °C ... 999 °C, temperature: 1 °F ... 999 °F
– Measured current: 0.1 mA ... 20 mA
• PRINCIP:
– Open:
The device works according to the open-circuit principle.
– Closed (default setting):
The device works according to the quiescent current principle. The operating modes
"ATEX", "TW" and "TB" operate exclusively on the quiescent current principle.
Digital devices
5.10 Operator control
3RS2 temperature monitoring relay
40 Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002