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Outputs and Inputs
thermoMETER CTL
8.5 Alarms
The thermoMETER CTL has following alarm features:
All alarms (alarm 1, alarm 2, output channel 1 and 2 if used as alarm output) have a fixed hysteresis of 2 K).
8.5.1 Output Channel 1 and 2 (Channel 2 on CTL, CTLG)
The respective output channel has to be switched into digital mode for activation. For this the CompactCon-
nect software is required.
8.5.2 Visual Alarms
These alarms will cause a change of color of the LCD display and will also change the status of the optional
relays interface. In addition, Alarm 2 can be used as open collector output at pin AL2 on the controller (24 V/
50 mA).
The alarms are factory-set as follows:
Alarm 1 Norm. closed/Low-Alarm
Alarm 2 Norm. open/High-Alarm
Both of these alarms will have effect on the LCD color:
BLUE Alarm 1 active
RED Alarm 2 active
GREEN No alarm active
For extended setup like definition as low or high alarm (via change of normally open/closed), selection of
the signal source (TObj, THead, TBox) a digital interface (e.g. USB, RS232) including the CompactConnect
software is needed.
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