Rockwell Automation 1769-IF4XOF2 Compact 8-Bit Low Resolution Analog I/O Combination Module - Manual (Page 36)

Publication 1769-UM008A-EN-P - November 2001
3-14 Installation and Wiring
As output impedance (Rs) and/or resistance (dc) of the cable (Rc) get
larger, system accuracy decreases. If you determine that the
inaccuracy error is significant, implementing the following equation in
the control program can compensate for the added inaccuracy error
due to the impedance of the output module and cable.
Removing the Finger-Safe Terminal Block
When wiring field devices to the module, it is not necessary to remove
the terminal block. If you remove the terminal block, use the write-on
label on the side of the terminal block to identify the module slot
location and type.
TIP
In a current loop system, source and cable
impedance do not impact system accuracy.
Vs Vin
Rs 2 Rc
× ( )
Ri + +
[ ]
Ri
-------------------------------------------------------
×
=
SLOT # _____
MODULE TYPE ______