10
4
Connect the Power (continued)
DC power supplies
1
Verify that each power supply is correctly installed in its bay and that the power switches
are OFF (0).
2
On each power supply, remove the screws securing the terminal block cover and slide the
cover straight off the terminal block.
3
Attach the appropriate lugs to the DC-input wires. (Suggested lugs are AMP 322985 or
52941; suggested DC-input wires are 10-AWG copper conductors.)
4
Wire the DC-input power supply to the terminal block (see figure), ensuring that all wire
connections are secure:
a) Connect the ground wire to the ground terminal (you should always connect the
ground wire first and disconnect it last)
b) Connect the –48V wire to the “
−
” terminal
c) Connect the –48V return to the “
+
” terminal
Warning
Before performing the following procedure, remove power to the
DC-input circuit by turning the circuit breaker OFF.
DC
OK
OK
FAN
OUTPUT
FAIL
o
Positive (+)
Negative (-)
Ground
