Cisco XM Universal Gateways Cisco AS5400XM - Manual (Page 85)

B-19
Cisco AS5400XM Universal Gateway Chassis Installation Guide
OL-6418-02
Appendix B Replacing the Power Supply
Replacing the Chassis Cover
Warning The illustration shows the DC power supply terminal block. Wire the DC power supply using the
appropriate lugs at the wiring end, or with no lugs, as illustrated. The proper wiring sequence is
ground to ground, positive to positive, and negative to negative. Note that the ground wire should
always be connected first and disconnected last. Statement 197
Figure B-21 DC Power Supply Connections
Caution Do not overtorque the terminal block contact screws. The recommended torque is 5.0 in.-lb (0.56 N-m).
a. Insert the safety ground (green wires) into the terminal block ground connectors and tighten the
locking screws. Ensure that no bare wire is exposed.
b. Insert the 48 VDC Return wires into the terminal block positive connectors (+) and tighten the
locking screws. Ensure that no bare wire is exposed.
c. Insert the –48 VDC wires into the terminal block negative connectors (–) and tighten the locking
screws. Ensure that no bare wire is exposed.
d. Make sure the power supply cords are secured to the cable strain-relief clamps on the DC power
supply with cable ties.
Warning After wiring the DC power supply, remove the tape from the circuit breaker switch handle and
reinstate power by moving the handle of the circuit breaker to the ON position. Statement 8
Note You can order a Y-connector (CAB-AC-Y) to plug into both power connectors on the power
supply. If you use this Y-connector, you remove the backup feature of this power supply by
eliminating redundant operations and reducing reliability. We highly recommend that you use
both power cords whenever possible.
Step 8 Power up the universal gateway.
On/off
switch
LEDs
31628
Terminal
block
Mounting screw Mounting screw
Mounting
screw
IN OK
DC OK
OTF
IN OK
DC OK
OTF
LEDs
Terminal
block
Strain-relief
clamps
Strain-relief
clamps