Electrical Installation
23
3.3. Control Cables Connections
shows
the location of the cabling terminals used for field cabling/wiring.
Before connecting the control cables, the person who carries out cabling work must take corresponding
anti-static measures.
Figure 3-4 Field Cabling Terminal
• Communication cables between main unit and terminal
CAN communication is used between the main unit and the terminal, and the user needs to cable on site. The
communication cables are led from the CANH/CANL terminal of the main unit and connected in series with the CANH/
CANL on each terminal block of the Vertiv
™
Liebert® XDO unit terminal.
• Remote shutdown
As shown in
, the 37# and 38# terminals can be connected to the remote shutdown switch. The terminal has been
default short-circuited in the factory. When a remote shutdown is required, remove the short-circuit wire/cable.
Note: When the 37# and 38# terminals are disconnected, the unit will shut down.
• Floor water leak detection sensor
The unit accessories are equipped with a floor water leakage detection sensor. When user uses it, connect one end to the
51# terminal of the terminal block and the other end to the 24# common end. Each device can be connected to any number
of detection sensors in parallel, but there is only one floor water leak alarm, and the alarm information is confirmed through
the controller.
The water leak detection sensor is recommended to be installed at a low point on the floor under the base of the unit, and
the farthest distance from the unit should not exceed 0.5 m. At the same time, the water leak detection sensor should be
placed away from a wet water trap or floor drainage.
