Nortel Networks Passport 4400 - Manual (Page 36)

Installing the Passport 4400 Passport 4400 Hardware Installation Manual
2-6
Plug the power cord supplied with your unit into the back of the chassis and into
an appropriately grounded three-pin wall outlet. This turns the unit on.
Powering Up a dc Unit
The dc version of the Passport 4400 unit has an external terminal block located
on the back of the unit below the fan vents. A small black plastic door covers the
terminal points. To access the terminal points, gently pull the door back from the
top with your finger.
The dc power source must be connected to the unit by attaching the +48 Vdc, -48
Vdc, and the chassis ground cords to their respective terminal points located on
the block as shown below.
Figure 2-8. Location of dc Connection in Terminal Block
Warning: !
Before applying power to the Passport 4400 unit, make sure that
the unit is properly grounded.
Warning: !
The connector attaching the Passport 4400 unit to the DC power
source must have a single disconnect switch.
E
D
C
B
A
-48 +48 Retur
n
Chassis
+48 Vdc (Return)
-48 Vdc
Chassis Ground
Terminal Block
Plastic Door