Emerson Rosemount 700XA Reference Manual page 37

Reference Manual
2-3-9000-744
2.1.3 Lower compartment
The lower compartment consists of the following components:
Backplane
Card cage
Optional
AC/DC
power
supply
Rosemount 700XA
The backplane is the gas chromatograph's (GC's) central printed circuit
board (PCB). Its main function is as a connection point for the GC's
specialized plug-in PCBs. The backplane also hosts connections for analog
outputs and analog inputs, serial ports, and an Ethernet port.
WARNING
Explosion
Failure to de-energize the analyzer may cause an explosion and severely
injure personnel.
Before opening the analyzer, disconnect all electrical power and
ensure that the area is free of explosive gases.
Keep cover tight while circuits are live.
Use cables or wires suitable for the marked "T" ratings.
Cover joints must be cleaned before replacing the cover.
Conduit runs to the enclosure must have sealing fitting adjacent to
enclosure.
The card cage holds the specialized PCBs that plug into the backplane. The
following PCBs are housed in the card cage:
• Preamplifier board
• Central processing unit (CPU) board
• Base in/out (I/O) board
• Heater/solenoid board
The card cage also has four additional slots for the following optional
PCBs:
• A second preamplifier board
• A second heater/solenoid board
• Two optional communications boards
WARNING
Electric shock
Failure to check the power supply label may result in injury or death to
personnel or cause damage to the equipment. Applying 110 to 220 Vac
to a DC power input GC severely damages the GC.
See power supply label prior to connection.
Check the GC's power design to determine if it is equipped for AC or
DC power.
Equipment description and specifications
June 2022
37