Cisco Systems OL-16447-01 manual Installing the DC-Power-Supply Module in the Switch, 3-11

Chapter 3 Installing and Removing AC- and DC-Power-Supply Modules

Power-Supply Module Installation

Figure 3-12 Attaching the Ground Lug and Wire Assembly

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1

1

Dual-hole ground lug

Installing the DC-Power-Supply Module in the Switch

Step 1 Verify that power is off at the DC circuits. To ensure that power is removed from the DC circuits, locate 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 3-13). When correctly inserted, the power supply is flush with the switch rear panel.

Figure 3-13 Inserting a DC-Power-Supply Module

PSU OK +24V -48V

DC
PSU OK	+24V -48V

DC

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Step 3 Align the two captive screws with the screw holes. Use a ratcheting torque screwdriver to torque each screw to 7 in-lb.

Step 4 Set the DC-voltage selector (see Figure 3-14):

•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.

	Cisco ME 3400E Ethernet Access Switch Hardware Installation Guide
OL-16447-01		3-11