Spectrum Controls 1762sc-IF8U - Manual (Page 14)

2-4 MicroLogix™ 1200 IO Universal Input Module
User's Manual Pub. 0300243‐02 Rev. B
2.3.3 Remove Power
!
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 and may lead to premature failure.
2.3.4 Selecting a Location
Reducing Noise
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 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. Refer to the
module’s heat dissipation specification.
In addition, route shielded, twisted-pair analog input wiring away from any high voltage
I/O wiring.
Section 2.4
Mounting
!
Attention
Do not remove protective debris strip until after the module and all
other equipment near the module is mounted and wiring is complete.
Once wiring is complete and the module is free of debris, carefully
remove protective debris strip. Failure to remove strip before operating
can cause overheating.
2.4.1 Minimum Spacing
Maintain spacing from enclosure walls, wireways, adjacent equipment, etc. Allow 50.8
mm (2 in.) of space on all sides for adequate ventilation, as shown: