Page 122 Foundation Fieldbus RMA803 Remote Indicator User's Guide Revision 4
Conditions of Use “for Ex Equipment”, Hazardous
Location Equipment or “Schedule of Limitations”
a. Consult the manufacturer for dimensional information on the flameproof joints for
repair.
b. Painted surface of the RMA 800 series 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.
c. The ambient temperature range, maximum process temperature and applicable
temperature class of the equipment is as follows:
RMA801: T4 for -50˚C < Ta < 85˚C
RMA803: T4 for -20˚C < Ta < 70˚C
d. The RMA800 series enclosure contains aluminum and is considered to present a
potential risk of ignition by impact or friction. Care must be considered during
installation and use to prevent impact or friction to avoid impact.
e. If a charge-generating mechanism is present, the exposed metallic part on the
enclosure is capable of storing a level of electrostatic charge 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 the equipment is installed in a zone 0 location.
f. On installation, the RMA800 series shall be provided with supply transient
protection external to the apparatus such that the voltage at the supply terminals
of the RMA800 series does not exceed 140% of the voltage rating of the
equipment.
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