Rockwell Automation 1769-BOOLEAN Compact I/O Module Reference Manual - Manual (Page 30)

Publication 1769-RM016A-EN-P - July 2006
30 Installation and Wiring
Remove Power
Reduce Noise
Most applications require installation in an industrial enclosure to reduce the
effects of electrical interference. Group your modules to minimize adverse
effects from radiated electrical noise and heat. Consider the following
conditions when selecting a location for the module. Position the module:
• away from sources of electrical noise such as hard-contact switches,
relays, and ac motor drives.
• away from modules that generate significant radiated heat, such as the
1769-IA16 module. Refer to the module’s heat dissipation specification.
Protect the Circuit Board from Contamination
The printed circuit board of the module must be protected from dirt, oil,
moisture, and other airborne contaminants. To protect the printed circuit
board, the system must be installed in an enclosure suitable for the
environment. The interior of the enclosure should be kept clean and the
enclosure door should be kept closed whenever possible.
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.