Figure 9 Connection Examples For Alarm Outputs - M&C CSS-VC1 Instruction Manual

Note
On X2 connector pin 10-12, external switches can be connected for controlling the sample gas pumps (internal or
external).
On X2 connector pin 7+8, an indicator can be connected that warning messages are present (yellow LED lights up
on the front of the TCU).
On X2 connector pin 7+9, an indicator can be connected that alarm messages are present (red LED lights up on
the front of TCU).
On X2 connector pin 1+6, an indicator can be connected that a cooler temperature alarm is present (excess or low
temperature alarm).
On X2.1 connector pin 3+8, 3+9, 3+10, 3+11 respectively, an indicator can be connected that flow alarm
messages are present. Since this is a warning message, the yellow LED on the front of the TCU lights up.
On X2.1 connector pin 3+4, 3+5, 3+6, 3+7 respectively, an indicator can be connected that liquid alarm messages
are present. Since this is an alarm message, the red LED on the front of the TCU lights up.
On X2.1 connector pin 1+2, an indicator of cooler temperature can be connected (standard 4-20 mA (0 to 50 °C
[32 to 122 °F]), 0-20 mA if ordered).
Note
Figure 9 Connection examples for alarm outputs
22
With the alarm relays, "safety first" applies, i.e. the contacts are de-energized and open
in the event of an alarm.
For external pump control potential free contacts have to be used!
Switch open => pump off
Switch closed => pump on
Install the signal lines separately from the power supply lines.
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