Rockwell Automation 1769-SDN Compact I/O DeviceNet Scanner Module User Manual - Manual (Page 24)

24 Publication 1769-UM009E-EN-P - August 2009
Chapter 3 Installation and Wiring
General Considerations The Compact I/O system 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
(1)
) and to circuits not exceeding Over Voltage Category II
(2)
(IEC
60664-1). (3)
Hazardous Location Considerations
This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
nonhazardous locations only. The following WARNING statement applies to
use in hazardous locations.
(1) Pollution Degree 2 is an environment where, normally, only nonconductive 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.
WARNING
EXPLOSION HAZARD
Substitution of components may impair suitability for Class I,
Division 2.
Do not replace components or disconnect equipment unless
power has been switched off or the area is known to be
nonhazardous.
Do not connect or disconnect components unless power has
been switched off or the area is known to be nonhazardous.
This product must be installed in an enclosure.
All wiring must comply with N.E.C. article 501-4(b).