Section 2.2 Power Requirements; Section 2.3 General Considerations; Hazardous Location Considerations - Spectrum Controls 1734 User Manual

2-2 Chapter 2: Installation and Wiring
Section 2.2
Power
Requirements
Section 2.3
General
Considerations
WARNING
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. 0300266-02 Rev. B
The module receives power through the bus interface from the +5 VDC/+24
VDC system power supply. The maximum current drawn by the module is
shown in the table below:
5 VDC
15 mA (maximum)
1734 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
Over Voltage Category II

2.3.1 Hazardous Location Considerations

This equipment is suitable for use in Class I, Division 2, Groups A, B, C, D or
non-hazardous locations only. 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.
Touch a grounded object to discharge static potential.
•
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 IP54 rated enclosure.
•
All wiring must comply with N.E.C. article 501-4(b).
24 VDC
20 mA (maximum)
2 3
(IEC 60664-1) .
1
and to circuits not exceeding