Rockwell Automation 1746-FIO4V SLC 500 Fast Analog I/O/ User Manual - Manual (Page 16)

Publication 1746-UM009B-EN-P - September 2007
16 Install and Wire the Modules
Considerations When
Wiring This section provides guidelines on wiring the system, grounding the
cables, determining cable length.
System Wiring Guidelines
Use the following guidelines in planning the system wiring to the
module.
• Analog common terminals (ANL COM) are electrically
interconnected inside the module, but not internally connected
to earth.
• Voltages on IN+ and IN– terminals must be within 0…20V with
respect to ANL COM to ensure proper input channel operation.
This is true for current and voltage input channel operation.
• Voltage outputs (OUT 0 and OUT 1) of the 1746-FIO4V module
are referenced to ANL COM. Load resistance (R1) for a voltage
output channel must be equal to or greater than 1 K
Ω.
• Current output channels (OUT 0 and OUT 1) of the 1746-FIO4I
module source current that returns to ANL COM. Load resistance
(R1) for a current output channel must be within 0…500
Ω.
• Input connections for single-ended or differential input are the
same.
ATTENTION
Before wiring the module, disconnect SLC system power, I/O
rack power, and module power.