Rockwell Automation 1797-OE8H FLEX Ex HART Analog Modules User Manual - Manual (Page 105)

Publication 1797-6.5.3 - March 2006
Apply FLEX Ex Analog I/O Modules 6-7
I/O
The input and output modules comply fully to and provide simple entity
parameters. These modules can directly interface with a wide variety of
intrinsically safe controls and instrumentation. Because all field device power is
supplied directly from the I/O module, no extra wiring or power sources are
needed in a hazardous area.
Finally, these modules maintain intrinsic safety in hazardous areas by providing
isolation from other modules in the system as well as intrinsic safety
segregation between channels on the same module.
Optimize Power
Distribution Your FLEX Ex system must use adequate power supplies to support the
physical locations determined earlier in this chapter. Each FLEX Ex I/O
module in the system is rated for input power, and the FLEX Ex power supply
is rated in the number of output channels and power available from each
channel.