Table 23: 14-Slot Chassis Front Cooling Module (BT8A78FAN3) Specifications (continued)
SpecificationItem
209.5 mm8.25 inDepth
1.70 kg3.80 lbWeight
Typical: 125 W
Maximum: 150 W
Power Consumption (40°C ambient)
NOTE: Before using for planning or implementation
purposes, contact Juniper Networks Support to
confirm the power consumption values.
188 CFMAir Flow
OOS (Out-of-service): Red
Hot Swap: Blue
LEDs
BTI7814 Booster Fans
Two BTI7814 Booster Fan (FAN9) modules are required to provide auxiliary cooling when
one or more UFM6 modules are installed in the BTI7814 chassis. These booster fans are
located at the rear of the chassis and are managed individually by the active CMM.
NOTE: FAN9 modules can be managed by the CMM only if the system is
running Release 4.1 (or later) software and firmware.
The FAN9 modules operate simultaneously at 19 percent of their maximum fan speed,
but the fan speed will increase when any of the following conditions are met:
•
Either a FAN3 module or the other FAN9 module has failed.
•
Either a FAN3 module or the other FAN9 module is not present in the chassis.
•
There is no active CMM in the system.
•
The system software and firmware have not yet been upgraded to BTI7800 Series
Release 4.1 or later.
NOTE: The fan speed of the FAN3 modules is not affected by the presence
and operational status of FAN9 modules. That is, FAN3 fan speed will not
increase if one or both FAN9 modules are either not present in the chassis or
operationally down.
57Copyright © 2019, Juniper Networks, Inc.
Chapter 2: BTI7800 Series Chassis
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