System wiring guidelines, System wiring guidelines -10 – Rockwell Automation 1769-OF4VI Compact I/O Isolated Analog Modules User Manual
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Publication 1769-UM014B-EN-P - May 2010
2-10 Installation and Wiring
System Wiring Guidelines
Consider the following when wiring your system.
General Guidelines
Channels are isolated from each other.
Do not use the analog module’s NC terminals as connection points.
To ensure optimum accuracy, limit overall cable impedance by keeping
your cable as short as possible. Locate the I/O system as close to your
sensors or actuators as your application will permit.
Use Belden 8761, or equivalent, shielded wire.
Keep shield connection to ground as short as possible.
Under normal conditions, the drain wire and shield junction must be
connected to earth ground via a panel or DIN rail mounting screw at
the analog I/O module end.
(1)
(1)
In environments where high-frequency noise may be present, it may be necessary to directly ground cable
shields to earth at the module end and via a 0.1µF capacitor at the sensor end.