Emerson Liebert iCOM User Manual download pdf (Page 44)

Operation

3.9.4 Liebert iCOM-DO

The Liebert iCOM-DO is an optional discrete output relay card that can be connected to the Liebert

iCOMs for providing dry alarm contact outputs for monitoring systems. The Liebert iCOM-DO is a

direct replacement of the Liebert ENV-DO card that was supported on previous Liebert control

systems. The Liebert iCOM-DO allows simultaneous use of the Liebert Intellislot cards as the Liebert

iCOM-DO communicates over the CANbus network instead of the IGMnet interface.

Liebert iCOM-DO card provides up to 15 configurable alarms through relay outputs. For the ratings

and additional data, refer to the Liebert iCOM-DO manual, SL-28096. Each alarm output has 3

terminals: N/C, N/O and common. The Liebert iCOM-DO setup can be found in the Service, Liebert

iCOM-DO menu (large display only). The Liebert iCOM-DO is pre-configured and its present is

automatically detected by the Liebert iCOM once it is connected to the CANbus line. The default

alarm configuration matches the original Liebert ENV-DO card alarm mapping.

Table 11 Alarm mapping

#Alarm Notes

01 Cooling Status The output is active when cooling is on.

02 Heating Status The output is active when heating is on.

03 Humidifying Status The output is active when humidification is on.

04 Dehumidifying Status The output is active when dehumidification is on.

05 High Temperature The output is active when high temperature alarm is active.

06 High Humidity The output is active when the high humidity alarm is active.

07 Low Temperature The output is active when the low temperature alarm is active.

08 Low Humidity The output is active when the low humidity alarm is active.

09a High Head Pressure C1 The output is active when the compressor 1 high head pressure alarm is active.

09b High Head Pressure C2 The output is active when the compressor 2 high head pressure alarm is active.

10 Loss of Airflow The output is active when a loss of air flow alarm is active.

11 Change Filters The output is active when a change filter alarm is active.

12 Water Alarm The output is active when a water alarm is active.

13 Condensing Pump Alarm The output is active when the condensing pump alarm is active.

14 Glycool Status The output is active when is free-cooling active.

15 Unit On The output is active the unit is turned on.

An event is active as long as it is not acknowledged. Once acknowledged, an alarm remains active until the event

situation is not true anymore and the event is reset by the board, which switches off the red LED and the general

alarm relay.

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Emerson Liebert iCOM User Manual Page 44