Section 2.2 General Considerations; Hazardous Location Considerations; Prevent Electrostatic Discharge - Spectrum Controls 1794 User Manual

Flex™ IO Isolated Universal Input Module
2-2
Section 2.2
General
Considerations
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.
User's Manual Pub. 0300231-03 Rev. A
Flex I/O is 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
2 3
II (IEC 60664-1) .

2.2.1 Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-
hazardous locations only. The following WARNING statement applies to use in
hazardous locations.
EXPLOSION HAZARD

!
Substitution of components may impair suitability for Class I,
Division 2.
Attention

Do not replace components or disconnect equipment unless
power has been switched off or the area is known to be non-
hazardous.

Do not connect or disconnect components unless power has
been switched off or the area is known to be non-hazardous.

This product must be installed in an enclosure.

All wiring must comply with N.E.C. article 501-4(b).

2.2.2 Prevent Electrostatic Discharge

Electrostatic
!
semiconductors if you touch analog I/O module bus connector pins or
the terminal block on the input module. Follow these guidelines when
Attention
you handle the module:

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 module.

If available, use a static-safe work station.

When it is not in use, keep the module in its static-shield bag.
1
and to circuits not exceeding Over Voltage Category
discharge can damage integrated circuits or