Honeywell SmartLine STT850 Quick Start Manual page 8

Apparatus Marked with Multiple Types of Protection
The user must determine the type of protection required for installation the
equipment. The user shall then check the box [ ] adjacent to the type of
protection used on the equipment certification nameplate. Once a type of
protection has been checked on the nameplate, the equipment shall not then be
reinstalled using any of the other certification types.
WARNINGS and Cautions:
Intrinsically Safe and Non-Incendive Equipment:
WARNING: SUBSTITUTION OF COMPONENTS MAY IMPAIR
SUITABILITY FOR USE IN HAZARDOUS LOCATIONS.
Explosion-Proof/ Flameproof:
WARNING: DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE
MAY BE PRESENT
Non-Incendive Equipment:
WARNING: DO NOT OPEN WHEN AN EXPLOSIVE ATMOSPHERE
MAYBE PRESENT
All Protective Measures:
WARNING: FOR CONNECTION IN AMBIENTS ABOVE 60
WIRE RATED 105
A.5 Conditions of Use" for Ex Equipment", Hazardous Location Equipment or "Schedule of
Limitations":
Consult the manufacturer for dimensional information on the flameproof joints for
repair.
Painted surface of the STT850 may store electrostatic charge and become a source of
ignition in applications with a low relative humidity less than approximately30%
relative humidity where the painted surface is relatively free of surface
contamination such as dirt, dust or oil. Cleaning of the painted surface should only be
done with a damp cloth.
Intrinsically Safe: Must be installed per drawing 50091227
Division 2: This equipment is suitable for use in a Class I, Division 2, Groups A, B, C, D;
T4 or Non-Hazardous Locations Only.
The installer shall provide transient over-voltage protection external to the
equipment such that the voltage at the supply terminal of the equipment does not
exceed 140% of the voltage rating of the equipment.
The enclosure is manufactured from low copper aluminum alloy. In rare cases,
ignition sources due to impact and friction sparks could occur. This shall be
considered during Installation, particularly if equipment is installed a Zone 0 location.
If a charge-generating mechanism is present, the exposed metallic part on the enclosure is
capable of storing a level of electrostatic that could become incendive for IIC gases. Therefore,
the user/ installer shall implement precautions to prevent the buildup of electrostatic charge,
e.g. earthing the metallic part. This is particularly important if equipment is installed a Zone 0
location.
o
C USE
o
C
STT850/750 Quick Start Guide
A.6. Control Drawing
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