Siemens 3RS2

Example: K2 alarm value at 20 °C (+ delay time):
• In the closed-circuit principle, a cable break is detected if it occurs, and the output relay is
deactivated; the display turns red
– K1 (11/12) is closed
– K2 (21/22) is closed and relay output 33/34 is open on the 3RS29
• In the open-circuit principle, a cable break is detected if it occurs, and the output relay is
deactivated; the display turns red
– K1 (11/14) is closed
– K2 (21/24) is closed and relay output 33/34 is open on the 3RS29
5.12 Diagnostics
Error Display Icon on the display
Temperature limit overshoot/undershoot Red display -
Short-circuit in a sensor cable (for resist‐
ance sensors only)
Red display, the "short-circuit" icon ap‐
pears
Cable break in a sensor cable Red display, the "cable break" icon ap‐
pears
Sensor outside of measuring range Red display, the "out-of-range" icon ap‐
pears
Communication error between the basic
unit and the sensor expansion module
Red display. "IRDA ERR" is indicated on
the display and the "nil" symbol is re‐
placed by "!".
-
Parameter error After resetting to the factory setting or in
the event of a parameter error, the de‐
vice enters the safe state (no tempera‐
ture monitoring). The user is prompted
to check the parameters. Pressing
the "Enter" button for longer than 2 sec‐
onds puts the device into "Set Mode".
-
Digital devices
5.12 Diagnostics
3RS2 temperature monitoring relay
Equipment Manual, 02/2022, A5E42462552002A/RS-AB/002 47