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Installation
2-73360-A2-GB20-20 December 1996
Installing the Redundant –ā48 Vdc Power
Supply
To install the E1 NTU using a redundant –48 Vdc
power supply, refer to Figure 2-11 and use the following
procedure.
To install the redundant –48 Vdc power supply,
1. Connect the black wire to the –48 Vdc return
source B.
2. Connect the red wire to the –48 Vdc return
source A.
3. Connect the green wire to a suitable earth ground.
4. Connect the orange wire to the –48 Vdc input
source B.
5. Connect the blue wire to the –48 Vdc input
source A.
6. Cut the white wire off at the outer insulation.
7. Plug the power connector into the E1 NTU.
1
2
3
4
5
6
BLACK
RED
GREEN
WHITE
ORANGE
BLUE
–48 VDC RETURN B
–48 VDC RETURN A
EARTH GROUND
–48 VDC INPUT B
–48 VDC INPUT A
495-1474
5
X
NTU POWER
PLUG
TO CUSTOMER-SUPPLIED BATTERY
CABLE NUMBER 3100-F1-520
Figure 2-11. –ā48 Vdc Redundant Source Power Supply Pinouts