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Expansion I/O Power Supply Installation Compact Expansion I/O Power Supplies are suitable for use in an industrial environment when installed in accordance with these instructions. Specifically, this equipment is intended for use in clean, dry environments (Pollution degree 2(1)) and to circuits not exceeding Over Voltage Category II(2) (IEC 60664-1).(3) Prevent Electrostatic Discharge Electrostatic discharge can damage integrated circuits or semiconductors if you touch bus connector pins. Follow these guidelines when you handle the power supply: • Touch a grounded object to discharge static potential. • Wear an approved wrist-strap grounding device. • Do not touch the bus connector or connector pins. • Do not touch circuit components inside the power supply. • If available, use a static-safe work station. • When not in use, keep the power supply in its static-shield bag. Remove Power Remove power before removing or inserting this power supply from the 1769 I/O system. When you remove or insert a power supply 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 power supply and its mating connector. Worn contacts may create electrical resistance. (1) Pollution Degree 2 is an environment where, normally, only non-conductive pollution occurs except that occasionally a temporary conductivity caused by condensation shall be expected. (2) Over Voltage Category II is the load level section of the electrical distribution system. At this level transient voltages are controlled and do not exceed the impulse voltage capability of the product’s insulation. (3) Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC) designations. CompactTM Expansion Power Supplies 5 ATTENTION ! ATTENTION ! Publication 1769-IN028A-EN-PPDF Image | ST PETERSBURG TABLE OF CONTENTS
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