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M160 Internet Router Hardware Guide
Label Color State Description
NO
AIRFLOW
(original
power
supply only)
Amber On steadily Pow er supply is inserted, but airflow around the
power supply is not sufficient.
CB OFF Amber On steadily Power supply is functioning, but the circuit breaker
is off.
Ta ble 13 lists electrical specifications for the power supply.
Table 13: Electrical Specifications for Power Supply
Descriptio
n
Specificat
ion
Maximum power output
Original pow er supply: 2400 W; nonisolated
Enhanced power supply: 3000 W; n onisolated
DC input voltage Nominal: –48 VDC, –60 VDC
Operating range: –42 to –72 VDC
DC input current rating 80 A @ –48 V
Output voltages +48 V @ 8.3 A (cooling system), +8.3 V @ 6 A (bias), –48 V to
–60 V@ 75 A
Circuit B reaker Box
The circuit breaker box is located on the rear of the chassis, above the
right po w er supply, as shown in Figure 2.
The circuit breaker box houses two circuit breakers and sets of terminal studs,
corresponding positionally to the two power supplies, as shown in Figure 19.
For proper router operation and power load s haring, connect a different
external DC power source to each set of terminal studs.
In addition, a grounding cable attaches to separate grounding points l ocated
above t he circuit breaker box, as shown in Figure 2. For more information, see
“Power, Connection, and Cable Specifications” on page 67.
38 Power System