Juniper BT8A78CH1, Hardware Overview And Installation Manual

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Table 20: BTI7802 1-Slot/2-Slot Chassis DC Power Entry Module (BT8A78PEM1-DC) Specifications (continued)
Specification Item
-42 V DC to -60 V DC Voltage
Input Range
NOTE: Input voltages outside
this range might cause the
chassis to operate
unpredictably.
30 A
External Breaker
Juniper Networks-supplied (BT8A78PWR1) Power Cable
Description State Color LEDs
The AC input power is off. OFF Green AC
The AC input power is on. ON
The DC output power is off. OFF Green DC
The DC output power is on. ON
Normal operation. OFF Amber O/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