Rockwell Automation 1769-IF4XOF2 Compact 8-Bit Low Resolution Analog I/O Combination Module - Manual (Page 26)

Publication 1769-UM008A-EN-P - November 2001
3-4 Installation and Wiring
Remove Power
Reducing Electrical Noise Interference
Most applications require installation in an industrial enclosure to
reduce the effects of electrical interference. Analog inputs and outputs
are highly susceptible to electrical noise. Electrical noise coupled to
the analog inputs will reduce the performance (accuracy) of the
module.
Group your modules to minimize adverse effects from radiated
electrical noise and heat. Consider the following conditions when
selecting a location for the analog module. Position the module:
•
away from sources of electrical noise such as hard-contact
switches, relays, and AC motor drives
•
away from modules which generate significant radiated heat,
such as the 1769-IA16. Refer to the module’s heat dissipation
specification.
In addition, route shielded, twisted-pair analog input and output
wiring away from any high voltage I/O wiring.
ATTENTION
!
Remove power before removing or inserting this
module. When you remove or insert a module with
power applied, an electrical arc may occur. An
electrical arc can cause personal injury or property
damage by:
•
sending an erroneous signal to your system’s field
devices, causing unintended machine motion
•
causing an explosion in a hazardous environment
Electrical arcing causes excessive wear to contacts on
both the module and its mating connector. Worn
contacts may create electrical resistance.