SRX

whe use command show chassis environment , we can see the output below  ,is there anyone can eplain to me what the list mean in the Item row ?  for example what does FPC XLR means . what is it used for . is there any document introduce SRX 1400 hardware part and what they are used for? 

show chassis environment 
node0:
--------------------------------------------------------------------------
Class Item                           Status     Measurement
Temp  PEM 0                          OK         45 degrees C / 113 degrees F
      PEM 1                          OK         51 degrees C / 123 degrees F
      Routing Engine 0               OK        
      Routing Engine 1               Absent    
      CB 0 Intake                    OK         42 degrees C / 107 degrees F
      CB 0 Exhaust A                 OK         46 degrees C / 114 degrees F
      CB 0 Mezz                      OK         42 degrees C / 107 degrees F
      FPC 0 Intake                   OK         50 degrees C / 122 degrees F
      FPC 0 Exhaust A                OK         53 degrees C / 127 degrees F
      FPC 1 Intake                   OK         58 degrees C / 136 degrees F
      FPC 1 Exhaust A                OK         68 degrees C / 154 degrees F
      FPC 1 XLR                      OK         79 degrees C / 174 degrees F
      FPC 3 Intake                   OK         78 degrees C / 172 degrees F
      FPC 3 Exhaust A                OK         63 degrees C / 145 degrees F
Fans  Fan 1                          OK         Spinning at high speed
      Fan 2                          OK         Spinning at high speed

node1:
--------------------------------------------------------------------------
Class Item                           Status     Measurement
Temp  PEM 0                          OK         46 degrees C / 114 degrees F
      PEM 1                          OK         47 degrees C / 116 degrees F
      Routing Engine 0               OK        
      Routing Engine 1               Absent    
      CB 0 Intake                    OK         36 degrees C / 96 degrees F
      CB 0 Exhaust A                 OK         40 degrees C / 104 degrees F
      CB 0 Mezz                      OK         38 degrees C / 100 degrees F
      FPC 0 Intake                   OK         43 degrees C / 109 degrees F
      FPC 0 Exhaust A                OK         45 degrees C / 113 degrees F
      FPC 1 Intake                   OK         41 degrees C / 105 degrees F
      FPC 1 Exhaust A                OK         55 degrees C / 131 degrees F
      FPC 1 XLR                      OK         63 degrees C / 145 degrees F
      FPC 3 Intake                   OK         64 degrees C / 147 degrees F
      FPC 3 Exhaust A                OK         55 degrees C / 131 degrees F
Fans  Fan 1                          OK         Spinning at high speed
      Fan 2                          OK         Spinning at high speed

{primary:node0}
CCTadmin@KS-MTC-INTFW01> 

PEM is basically the power supply ( Power Entry Module ).

Routing Engine should be self evident.

FPC is the interface card with interfaces ( Flexible PIC Concentrator ) similar to line card.

CB is the Control Board.

http://www.juniper.net/techpubs/en_US/release-independent/junos/information-products/topic-collections/hardware/srx-series/srx1400/hw/srx1400-hardware-guide.pdf

This is the hardware guide for the SRX-1400 and you'll find details of the above command on page 99 of the aforementioned manual. The XLR is a networking processor on the FPC ( you would have to look at the hardware card for a given card to get details on its specs ).

thank you for you answer

You're welcome !