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Installation
2-73160-A2-GB21-50 January 1997
Installing the Redundant –ā48 Vdc Power
Supply
To install the DSU/CSU 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 DSU/CSU.
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
496-14300-0
1
X
DSU/CSU POWER
PLUG
TO CUSTOMER-SUPPLIED BATTERY
Figure 2-11. –ā48 Vdc Redundant Source Power Supply Pinouts