Installing The Dc-Power-Supply Module In The Switch - Cisco ME 3400E Hardware Installation Manual

Chapter 3 Installing and Removing AC- and DC-Power-Supply Modules
Figure 3-12
1

Installing the DC-Power-Supply Module in the Switch

Verify that power is off at the DC circuits. To ensure that power is removed from the DC circuits, locate
Step 1
the circuit breakers for the DC circuits, switch the circuit breakers to the OFF position, and tape the
circuit-breaker switches in the OFF position.
Step 2 Insert the new power-supply module into the power-supply slot, and gently push it into the slot (see
Figure
Figure 3-13
PSU OK
Align the two captive screws with the screw holes. Use a ratcheting torque screwdriver to torque each
Step 3
screw to 7 in-lb.
Set the DC-voltage selector (see
Step 4
•
•
OL-16447-01
Attaching the Ground Lug and Wire Assembly
1
Dual-hole ground lug
3-13). When correctly inserted, the power supply is flush with the switch rear panel.
Inserting a DC-Power-Supply Module
+24 V -48
V
DC
PSU OK
+24 V -48
V
DC
For telecom applications (–36 to –72 VDC), set the DC-voltage selector to –48 VDC.
For industrial applications (+18 to +36 VDC), set the DC-voltage selector to +24 VDC.
Figure 3-14):
Cisco ME 3400E Ethernet Access Switch Hardware Installation Guide
Power-Supply Module Installation
3-11