Rockwell Automation 1746-NI8 SLC 500 Analog Input Module Instructions - Manual (Page 7)

SLC 500™ Analog Input Module 7
Publication 1746-IN006A-US-P
Heat and Noise Considerations
Most applications require installation in an industrial enclosure to reduce the effects
of electrical interference. Analog inputs are highly susceptible to electrical noise.
Electrical noise coupled to the analog inputs reduces 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 slot for the analog input
module. Position the module:
• in a slot 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 32-point
I/O module (series C or earlier)
In addition, route shielded twisted-pair analog input wiring away from any
high-voltage I/O wiring.
Module Installation and Removal
When installing the module in a chassis, it is not necessary to remove the terminal
block from the module. However, if the terminal block is removed, use the write-on
label (shown below) located on the side of the terminal block to identify the module
location and type.
!
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.
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SLOT RACK
MODULE
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