User manual

Publication 1797-6.5.1 - April 1999
Chapter 1
About the FLEX Ex Analog Modules
What this Chapter Contains
Read this chapter to familiarize yourself with the 1797-IE8 and 1797-OE8
analog modules.
What the FLEX Ex Analog
I/O Modules Do
The 1797-IE8 module accepts up to 8 analog inputs. The inputs are
non-isolated and will accept current in either of the following two ranges:
4-20mA or 0-20mA. The default input range is 0-20mA. The inputs have
both fixed hardware filters and selectable firmware digital filters.
Similarly, the 1797-OE8 module provides up to 8 analog outputs. The
outputs are nonisolated and will provide current in either of the following
two ranges: 4-20mA or 0-20mA. The default output range is 0-20mA.
Both modules offer:
• local microprocessor intelligence for advanced features
• full functionality without switches or jumpers
• multiple data ranges that can be independently programmed
in channel groups
• lead breakage detection
• overrange/underrange alarms
• remote transmitter alarm
as well as a host of other module features.
For information on: See page:
What the FLEX Ex Analog I/O
Modules Do
1-1
How FLEX Ex Analog Modules
Communicate with Programmable
Controllers
1-2
Physical Features of Your Analog I/O
Module
1-3
Chapter Summary 1-6