User manual

DISCONTINUED
PROD UC T
Outputs - Status and Alarms
5
4.0 OUTPUTS - STATUS AND ALARMS
A three-position screw terminal block is provided for each
Form-C contact closure output. The wiring connection is uni-
form for all 16 outputs:
Position 1: Common
Position 2: Normally Closed
Position 3: Normally Open
Position 1 is the left-most connection, and is marked by a tri-
angular symbol on the circuit board. The outputs are not
supervised (except as noted below); thus, the N.O. contact
would be closed only upon an active/alarm condition.
Refer to Table 3 for the standard mapping of status and
alarms. The output terminal block (TB) for each alarm output
is configurable. For details, refer to the Liebert iCOM manual,
SL-18835, available at Liebert’s Web site: www.liebert.com
NOTE
The top of the screw terminals cannot be used to obtain
contact when using a meter to verify the status of a contact
closure. The meter must contact the terminal block in the
openings where the wires are inserted.
Table 3 Standard mapping of status and alarms
Terminal Block Description Liebert iCOM
TB1 Cooling Status
✔
TB2 Heating Status
✔
TB3 Humidifying Status
✔
TB4 Dehumidifying Status
✔
TB5 High Temperature
✔
TB6 High Humidity
✔
TB7 Low Temperature
✔
TB8 Low Humidity
✔
TB9a High Head Pressure C1
✔
TB9b High Head Pressure C2
✔
TB10 Loss of Airflow
✔
TB11 Change Filters
✔
TB12 Water Detected/Customer Alarm 1
✔
TB13 Customer Alarm 2
✔
TB14 GLYCOOL Status
✔
TB15 Unit On
✔