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BTI7800 Series Hardware Overview and Installation Guide
Table 20: BTI7802 1-Slot/2-Slot Chassis DC Power Entry Module (BT8A78PEM1-DC) Specifications (continued)
Item
Voltage
Input Range
NOTE:
Input voltages outside
this range might cause the
chassis to operate
unpredictably.
External Breaker
Power Cable
LEDs
AC
DC
O/T
Compliance
50
Specification
-42 V DC to -60 V DC
30 A
Juniper Networks-supplied (BT8A78PWR1)
Color
Green
Green
Amber
UL CSA
ETSI
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
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.
State
Description
OFF
The AC input power is off.
ON
The AC input power is on.
OFF
The DC output power is off.
ON
The DC output power is on.
OFF
Normal operation.
ON
An over-temperature condition or a fan fault
exists.
(left slot) and
PEM 1
PEM 2
Copyright © 2019, Juniper Networks, Inc.
(right slot). Each AC PEM can
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