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2. Installation
3160-A2-GB21-90 February 2001
2-7
Installing the Redundant –48 Vdc Power Supply
To install the DSU/CSU using a redundant –48 Vdc SELV power supply, refer to
Figure 2-11, –48 Vdc Redundant Source Power Supply Pinouts, and use the
following procedure.
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 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.
Figure 2-11. –48 Vdc Redundant Source Power Supply Pinouts
1
2
3
4
5
6
BLACK
RED
GREEN
WHITE
ORANGE
BLUE
–48 VDC RETURN B
–48 VDC RETURN A
GROUND
–48 VDC INPUT B
–48 VDC INPUT A
99-14300-02
X
DSU/CSU POWER
PLUG
TO CUSTOMER-SUPPLIED BATTERY