Section 3.2 Power Requirements; Section 3.3 General Considerations; Hazardous Location Considerations - Spectrum Controls 1769 User Manual

3-2 Compact™ IO Isolated RTD/Resistance Module
Section 3.2
Power
Requirements
Section 3.3
General
Considerations
2
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.
3
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.
4
. Pollution Degree 2 and Over Voltage Category II are International Electrotechnical Commission (IEC)
designations.
User's Manual Pub. 0300241-01 Rev. A
The module receives power through the bus interface from the +5V dc/+24V dc system
power supply. The maximum current drawn by the module is shown in the table below.
5V dc
190 mA
Compact 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
3 4
II (IEC 60664-1)

3.3.1 Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or non-
hazardous locations only. Operating temperature code T5 is assumed. The following
WARNING statement applies to use in hazardous locations.
•
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 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).
24V dc
35 mA
2
) and to circuits not exceeding Over Voltage Category