Table 20: BTI7802 1-Slot/2-Slot Chassis DC Power Entry Module (BT8A78PEM1-DC) Specifications (continued)
SpecificationItem
-42 V DC to -60 V DCVoltage
Input Range
NOTE: Input voltages outside
this range might cause the
chassis to operate
unpredictably.
30 AExternal Breaker
Juniper Networks-supplied (BT8A78PWR1)Power Cable
DescriptionStateColorLEDs
The AC input power is off.OFFGreenAC
The AC input power is on.ON
The DC output power is off.OFFGreenDC
The DC output power is on.ON
Normal operation.OFFAmberO/T
An over-temperature condition or a fan fault
exists.
ON
UL CSA
ETSI
Compliance
BTI7802 AC PEM
The BTI7802 chassis can be powered by up to two fan-cooled 1-Slot/2-Slot Chassis AC
Power Entry Modules (BT8A78PEM1-AC). Each AC PEM draws air from the front of the
chassis and exhausts directly out the rear. A non-redundant configuration requires one
AC PEM. A redundant configuration requires two AC PEMs. It is recommended that you
configure your chassis with two AC PEMs.
The PEM slots are numbered PEM 1 (left slot) and PEM 2 (right slot). Each AC PEM can
power the full chassis.
In a redundant configuration, the A feed is applied to one AC PEM, and the B feed is
applied to the other AC PEM. Each feed should be protected with a 15A breaker.
Copyright © 2019, Juniper Networks, Inc.50
BTI7800 Series Hardware Overview and Installation Guide
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