Emerson Rosemount 700XA Reference Manual page 26

Lower compartment
The lower compartment consists of the following components:
■ Backplane. The backplane is the 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.
■ Card cage. The card cage holds the specialized PCBs that plug into the backplane. The following PCBs are housed in the card
cage:
— Preamp board
— CPU board
— Base I/O board
— Heater/Solenoid board
The card cage also has four additional slots for the following optional PCBs:
— A second preamp board
— A second heater/solenoid board
— Two optional communications boards
WARNING
EXPLOSION
The explosion-proof housing should not be opened when the unit is exposed to an explosive environment. If access to the
explosion-proof housing is required, take precautions to ensure that an explosive environment is not present. Failure to do
so may result in injury or death to personnel or cause damage to the equipment.
■ Optional AC/DC power supply.
WARNING
POWER
See power supply label prior to connection. Check the unit power design to determine if it is equipped for AC or DC power.
Applying 110/220 Vac to a DC power input unit severely damages the unit. Failure to check the power supply label may result in
injury or death to personnel or cause damage to the equipment.
Note
The Rosemount 700XA CSA-certified unit is equipped with 3/4-inch NPT-thread adapters.
26
July 2020
Emerson.com/Rosemount