Chapter 3
Installing the enclosures
25
DC power supply
The DC Power and Cooling Module is shown in the figure below. This PCM option is supported by MSA 2060 enclosures.
DC (+ and -) power cable connect
Power switch
Release latch
DC GND power cable connect
Figure 18 DC Power and Cooling Module
Connect DC
power cable to DC power supply and DC PCM
+L
GND
-L
Example ring/lug connector (typical 3 places)
Figure 19 DC power cable section featuring lug connectors
Connection of individual DC cable wires requires a No.2 phillips screwdriver. Access the enclosure rear panel when
making power cable connections.
1. Obtain a suitable DC power cable for each DC PCM that will connect to a DC power source.
2. Verify that the power switch on each redundant PCM is in the Off position.
3. Remove the DC PCM cable connect cover to provide access to the positive (+) and negative (-) connectors.
4. Attach the black wire to the (+) connector on the PCM (see DC PCM figure above):
a. Using a No.2 phillips screwdriver or flat blade, remove the screw with square washer from the (+) connection hole.
b. Align the black wire lug over the (+) connection hole.
c. Reinstall the screw with square washer to secure the lug connector in place, applying a torque between 1.7 N-m (15
in-lb) and 2.3 N-m (20 in-lb).
5. Attach the red wire to the (-) connector on the PCM (see DC PCM figure above):
a. Using a No.2 phillips screwdriver or flat blade, remove the screw with square washer from the (-) connection hole.
b. Align the red wire lug over the (-) connection hole.
c. Reinstall the screw with washer to secure the lug connector in place, applying a torque between 1.7 N-m (15 in-lb)
and 2.3 N-m (20 in-lb).
d. Reattach the cable connect cover to the DC PCM.
6. Attach the green wire to the ground connector on the PCM (see DC PCM figure above).
a. Using a No.2 phillips screwdriver, remove the screw and lock washer from the ground connection hole.
b. Align the green wire lug over the ground connection hole.