Rockwell Automation 1769-OF4VI Compact I/O Isolated Analog Modules - Manual (Page 26)

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.