Cisco 10008 - Manual (Page 22)

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Figure 14 DC Power Connections
Step 4 Connect the DC power lead from the first external power source to the DC terminal block A labeled –48V.
Step 5 Connect the return wire (RTN) to terminal block A labeled RTN (+).
• If you have redundant DC power, continue with Step 6.
• If you do not have redundant DC power, go to Step 8.
Step 6 Connect the DC power lead from the second external power source to the DC terminal block B labeled –48V.
Step 7 Connect the return wire (RTN) to terminal block B labeled RTN (+).
30024
RTN (+)
DC terminal
block B
– 48/–60
V
RTN (+)
– 48/–60
V
DC terminal
block A