Installing the Power Cables
800-357-104-01, Revision 01
20
September 29, 2000
HMS-357 List 4 and List 5
I
NSTALLING
THE
P
OWER
C
ABLES
Figure 14.
Opening the Ferite and Routing the Battery Feed Wires (Right-Hand Side, Rear View)
-48 VA Return and -48 VB Return are tied together on the backplane and are referenced as RTN
on the connector.
Step
Procedure
Installer Check
ü
ü
ü
ü
Whenever installing or removing units from the HMS-357 chassis, be sure to wear an
antistatic wrist strap and connect it to the ESD strap input.
1
Verify fuses are removed from fuse panel.
H
2
Remove the slide panel by loosening the two screws that secure it (two turns of the screw using a
No. 1 Phillips should be sufficient). Slide the panel 1 approximately
1
/
4
-inch to the left to release the
slide panel and lift to remove it.
H
3
Attach ground lug (see
) using two 6-32 x
3
/
16
screws to the rear of the chassis.
H
4
Attach the other end of the ground lug using two 12-24 x
1
/
2
screws to the CO rack using locally
approved methods (6 AWG or larger cables require double screw connectors).
H
5
Reduce EMI by prying open the ferite clamp with a slot screwdriver and route the battery feed wires
through the clamp before connecting them to the Power Access.
H
6
Attach a ring connector (or locally approved connector) to terminate the 12 AWG ground wire at
frame ground (FGND) on the Power Access connector (if needed).
H
Terminal block
Ferite
ESD strap input
