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Installation
2-7
3160-A2-GB21-80
March 1999
Installing the Redundant –ā48 Vdc Power Supply
To install the DSU/CSU using a redundant –48 Vdc SELV power supply, refer to
Figure 2-11 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.
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
Figure 2-11. –48 Vdc Redundant Source Power Supply Pinouts