Alarm contacts
The relay state shown on the connection
diagrams is the non-operative state.
After switching on, the relay contacts are
non-operative, the alarm current circuit is
open, the lamp is not on.
In the event of an error, the relay contact
closes the alarm current circuit, the lamp
lights up.
Hold
Active during configuration and calibration
Measuring range
0 µS/cm ... 2 S/cm (no measuring range adjustment).
The measuring ranges float and are determined by
the measuring cells connected (see chapter 9).
Current outputs 1 and 2*
4 ... 20 mA
Current output 1: meas. value for
4 mA signal current
0 µS/cm
Current output 1: meas. value for
20 mA signal current
2000 mS/cm
Current output 2: temperature
value for 4 mA signal current
*
–35.0 °C
Current output 2: temperature
value for 20 mA signal current*
250.0 °C
*On versions equipped accordingly
RELAIS2.CDR
non-operative state
alarm state
Fig. 5.3
Recommended fail-safe
circuit for an alarm contact
LM253E5A.CHP
Liquisys M CLM 223 / 253
Instrument configuration
Hauser
23
