Nortel Networks NN46200-310 - Manual (Page 33)

Installing the DC power supply 33
5 Push the new power supply partway into the bay, leaving the
terminal block at the side of the power supply exposed.
See
“Job aid: Inserting the DC power supply” (page 36) .
6 Use a Phillips screwdriver to remove the screw that secures the
plastic safety cover to the power supply and remove the cover.
Set the cover aside; you will replace it later.
7 Note the positions of the ground studs and of the positive and
negative power inputs. See
“Job aid: DC power supply input and
ground stud location” (page 36) .
Either +VDC or –VDC can be referenced to the frame ground for
+48 VDC (nominal) or –48 VDC (nominal) applications.
8 Make sure that the +DC cable is always connected to the
positive terminal and the –DC cable is always connected to the
negative terminal.
DANGER
Risk of injury by electric shock
Before you continue with this procedure, ensure that
the DC power source is switched off.
9 Attach the earth ground lead to the ground stud on the power
supply. See
“Job aid: Attaching the earth ground lead to the
ground stud” (page 37) .
Use the washers in the following order:
a flat washer
b crimp lug
c lock washer
d Hex nut
Nortel Ethernet Routing Switch 8300
Installation — DC Power Supply
NN46200-310 01.01 Standard
9 June 2008
Copyright © 2008 Nortel Networks
.