M160 Internet Router Hardware Guide
Label Color State Description
NO
AIRFLOW
(original
power
supplyo nly)
Amber Onsteadily Power supply is inserted, but airflow aroundthe
power supply is not sufficient.
CB OFF Amber Onsteadi ly Powersup ply is functioning, but the circuit breaker
is off.
Table1 3 lists electrical specifications for the power supply.
Table 13: Electrical Specifications for Power Supply
DescriptionSpecification
Maximum power output Original power supply: 2400 W; nonisolated
Enhanced power supply: 3000 W; nonisolated
DC input voltage Nominal: –48 VDC, –60 VDC
Operating range: –42 to –72 VDC
DC input current rati ng 80 A @ –48 V
Output voltages +48 V @ 8.3 A (cooling s ystem), +8.3 V @ 6 A (bias), –48 V to
–60 V@ 75 A
Circuit Breaker Box
The circuit breaker boxis located on the rear of the chassis, above the
right power 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 routeroperation and power load sharing, connect a different
external DC power source to each set of terminal studs.
In addition, a grounding cableattaches to separate grounding points located
above the circuit breakerbox, as shown in Figure 2. Formore information, see
“Power,C onnection, and Cable Specifications” on page 67.
38 Power System