Rockwell Automation 1794 FLEX I/O System with ControlLogix for SIL2 - Manual (Page 32)

Publication 1794-RM001G-EN-P - December 2011
3-10 FLEX I/O Modules
Wiring the Single-Ended Input Module in Current Mode
In addition to following the General Considerations when using Any FLEX
I/O Analog Input Module on page 3-7, before wiring the module, consider
the following application guideline:
• Placement of Other Devices in Current Loop: you can locate other
devices in an input channel’s current loop anywhere as long as the
current source can provide sufficient voltage to accommodate all of the
voltage drops (each module input is 250 ohms)
RET RET
RET RET
Current
Source B
Current
Source B
Current
Source A
Current
Source A
1794-TB3 1794-TB3
1794-TB3 1794-TB3
1794-IE8
Analog Input
1794-IE8
Analog Input
1794-IE8
Analog Input
1794-IF4I
Analog Input
1794-IF4I