Spectrum-controls 1762sc-IF8U User Manual download pdf (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:

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 37 38

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Spectrum-controls 1762sc-IF8U User Manual Page 14