Dc Power Supply - HP MSA 2050 User Manual

DC power supply

DC power supplies are equipped with a power switch, as shown in the figure below.
Figure 13 DC power supply
Connect power cable to DC power supply
Locate two DC power cables that are compatible with your controller enclosure.
Connector (front view)
Figure 14 DC power cable featuring sectioned D-shell and lug connectors
See Figure 13 and
1. Verify that the enclosure power switches are in the Off position.
2. Connect a DC power cable to each DC power supply using the D-shell connector. Use the UP>
arrow on the connector shell to ensure proper positioning (see adjacent left side view of D-shell
connector).
3. Tighten the screws at the top and bottom of the shell, applying a torque between 1.7 N-m (15
in-lb) and 2.3 N-m (20 in-lb), to securely attach the cable to the DC power supply module.
4. To complete the DC connection, secure the other end of each cable wire component of the DC
power cable to the target DC power source.
Check the three individual DC cable wire labels before connecting each cable wire lug to its power source. One cable
wire is labeled ground (GND) and the other two wires are labeled positive (+L) and negative (-L), respectively (shown
in Figure 14
CAUTION: Connecting to a DC power source outside the designated -48V DC nominal range (-36V DC to -72V
DC) may damage the enclosure.
24 Installing the enclosures
Figure 14 when performing the following steps:
above).
DC power supply unit
Connector pins (typical 2 places)
+L +L
GND GND
-L -L
Ring/lug connector (typical 3 places)
Power
switch
Power
cable
connect
+L +L
GND GND
-L -L
D-shell
(left side view)