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Chapter 4: Maintenance Procedures
Replacing a DC Power Supply in the E4G-400 Router
In a redundant power configuration, you can replace one E4G-400 DC power supply without powering
down the router.
You need the following tools and materials to replace a 300 W DC power supply:
#1 Phillips screwdriver
●
Torque screwdriver and wrench or torque driver with attachments for tightening screws and nuts
●
Thermal protective gloves (required for removal of a power supply)
●
WARNING!
Be sure to disconnect all power cables before you disconnect the chassis ground wire.
Removing the Power Supply
To remove an installed 300 W DC power supply:
1 De-energize the DC circuit.
2 Disconnect the DC power cables as follows:
a Slide the cover off the terminal block.
b Loosen the screws that secure the cable terminals to the terminal block.
c Slide the wires out from under the captive washers.
3 Disconnect the ground wire as follows:
a Remove the screw that secures the ground wire to the power supply.
b Move the wire away from the power supply.
4 Push the latching tab to the left as you pull outward on the handle to disengage the power supply
internal connectors (see
Figure 44: Removing a DC Power Supply
5 Carefully slide the power supply the rest of the way out of the router.
74
Figure
44).
SH_212
E4G Series Routers Hardware Installation Guide
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