Internally, the DC outputs of these rectifiers are protected through user-replaceable
fuses. The fuse array for the A1/A2 feeds is located behind the rectifier in Slot 2. The fuse
array for the B1/B2 feeds is located behind the rectifier in Slot 3. For instructions on
replacing these fuses, see “Replacing the Fuses on a BTI7814 AC PEM” on page 185.
If both 2900W (53.5V) AC Rectifier Modules in the same feed pair are not powered (e.g.
A1 and A2, or B1 and B2), but the chassis is otherwise powered (by the other feed pair),
the following occurs:
•
Both unpowered 2900W (53.5V) AC Rectifier Modules are not shown in inventory.
•
The red LEDs on the unpowered 2900W (53.5V) AC Rectifier Modules are not
illuminated.
•
A powerAbsent alarm is not raised for either of these two unpowered modules.
If one 2900W (53.5V) AC Rectifier Module is powered and the other 2900W (53.5V) AC
Rectifier Module in the same feed pair is seated but not powered, the following occurs:
•
The unpowered 2900W (53.5V) AC Rectifier Module is shown in inventory.
•
The red LED on the unpowered 2900W (53.5V) AC Rectifier Module is not illuminated.
•
A powerAbsent alarm is raised for the unpowered module.
BTI7814 AC PEM Specifications
Table 19: BTI7814 AC Power Entry Module (BT8A78ACM1) Specifications
SpecificationItem
Physical Dimensions
107 mm4.2 inWidth
41.4 mm1.6 inHeight
355.1 mm13.3 inDepth
2.1 kg4.7 lbWeight
The power dissipated depends on the load. The BT8A78ACM1 is 95% efficient.Power Consumption (40°C
ambient)
1
NOTE: The power capacity varies with the input voltage.
1480 W @ 100 VAC input
1640 W @ 110 VAC input
2900 W @ 180 VAC input and above
Power Capacity
Output (nominal) : -53.5 VDCVoltage
Copyright © 2019, Juniper Networks, Inc.46
BTI7800 Series Hardware Overview and Installation Guide
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