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Vertiv I Liebert LPC I User Manual
will be shorted. As a result, the air conditioner system will generate an audible alarm with the
PACC controller LCD displaying the alarm information.
• Terminals 50# and 24# are allocated for the smoke detector alarm switch.
• Terminals 37# and 38# are allocated for the remote alarm.
• Terminals 51# and 24# are allocated for the water- under-floor sensor as defined in
the factory settings.
2.12.8 External General Alarm
• Terminals 75# and 76# can be connected to the external general systems. They relay
output signals to the external alarm devices akin to an alarm indicator. When the
critical alarm occurs, the contact will get closed to trigger remote alarms and send
signals to the building management systems.
• Alternatively, it may dial the paging system automatically. The power supply of the
external alarm systems is prepared from the customer end (user-prepared).
2.12.9 SIC Card
Factory-installed
If the LPC unit is pre-installed with SIC card slot in the factory, the SIC card needs to be
checked for signal #A, #B. If the connection is directly taken from the control board as
depicted in figure 1-11, then, check the connections to the service tooling connection
terminals #77 and #78 of the control board.
Figure 2-33 SIC monitoring card factory installation wiring diagram
On-site installation
In the case of a SIC card, the customer needs to connect #A, #B, #GND and #12 on the SIC
card to #77, #78, #GND and #12V respectively on the terminal block.
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