Juniper MX2020 Hardware Manual page 488

For the fan trays, the output for the show chassis environment command is similar to the following:
user@host> show chassis environment
Class Item
Temp PSM 0
PSM 1
PSM 2
PSM 3
PSM 4
PSM 5
PSM 6
PSM 7
PSM 8
PSM 9
PSM 10
PSM 11
PSM 12
PSM 13
PSM 14
PSM 15
PSM 16
PSM 17
PDM 0
PDM 1
PDM 2
PDM 3
CB 0 IntakeA-Zone0
CB 0 IntakeB-Zone1
CB 0 IntakeC-Zone0
CB 0 ExhaustA-Zone0
CB 0 ExhaustB-Zone1
CB 0 TCBC-Zone0
CB 1 IntakeA-Zone0
CB 1 IntakeB-Zone1
CB 1 IntakeC-Zone0
CB 1 ExhaustA-Zone0
CB 1 ExhaustB-Zone1
CB 1 TCBC-Zone0
SPMB 0 Intake
SPMB 1 Intake
Routing Engine 0
Routing Engine 0 CPU
Routing Engine 1
Status Measurement
Absent
Absent
Absent
Absent
OK 34 degrees C / 93 degrees F
OK 31 degrees C / 87 degrees F
OK 30 degrees C / 86 degrees F
OK 30 degrees C / 86 degrees F
OK 31 degrees C / 87 degrees F
Absent
Absent
Absent
Absent
OK 32 degrees C / 89 degrees F
OK 31 degrees C / 87 degrees F
OK 30 degrees C / 86 degrees F
OK 30 degrees C / 86 degrees F
OK 30 degrees C / 86 degrees F
OK
OK
OK
OK
OK 25 degrees C / 77 degrees F
OK 29 degrees C / 84 degrees F
OK 28 degrees C / 82 degrees F
OK 27 degrees C / 80 degrees F
OK 28 degrees C / 82 degrees F
OK 32 degrees C / 89 degrees F
OK 30 degrees C / 86 degrees F
OK 25 degrees C / 77 degrees F
OK 39 degrees C / 102 degrees F
OK 33 degrees C / 91 degrees F
OK 28 degrees C / 82 degrees F
OK 32 degrees C / 89 degrees F
OK 30 degrees C / 86 degrees F
OK 24 degrees C / 75 degrees F
OK 35 degrees C / 95 degrees F
OK 31 degrees C / 87 degrees F
OK 27 degrees C / 80 degrees F
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