Flowserve L75 Series Electric Actuator - Manual (Page 5)

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L75 Series Electric Actuator — Modbus RTU FCD LMAIM7502-00 – 07/05
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Flowserve recommends an indoor storage environment suitable for human occupancy if the product
must be stored prior to installation. Do not store the positioner in any of the following conditions:
Where exposure to relative humidity is greater than 85%.
Where acid or alkali fumes are present.
Where ultraviolet or other radiation is above normal background conditions.
Where temperatures are above 120°C or are below -40°C
Within 50 feet of any source of ozone.
Operating solid-state electronic equipment near or beyond its high temperature ratings is the primary
cause for most failures. It is very important to consider factors that affect this product’s operating
temperature. Operating an electronic device at or below its low temperature rating may result in
inoperability. Proper operation usually resumes when rated operating temperatures are established.
Low-temperature problems can be easily cured by addition of a thermostatically controlled heater to the
actuator housing.
Flowserve has manufactured this product using moisture-proofing and fungicidal coatings. The coatings
provide added protection against the affects of high humidity. Where relative humidity is consistently
80% to 90% and the ambient temperature is subject to large variations, a heater/thermostat option
should be installed in the actuator housing. The heater should not increase the internal temperature
beyond the rated operating temperature.
Table 1: Electronic Printed Circuit Board Specifications
Power requirements
8345 / 8354 Modbus RTU Interface Card 120 VAC – 50 mA max.
8336 / 8366 Modbus RTU Interface Card 240 VAC – 25 mA max
Device Modbus
Firmware Revision 5/6/00
Transmission Speed 9.6 or 19.2 Kbaud maximum
Temperature
Operational -40°F to 150°F (-40°C to 65°C)
Storage -40°F to 250°F (-40°C to 120°C)
Mechanical Installation
Installation is best performed at the factory using brackets and mounting hardware designed for
the purpose. Factory-trained individuals must perform installation and calibration in any event. Field
upgrade of a non-Modbus unit to Modbus unit is possible with the proper hardware and training.
Electrical Connections
a CAUTION: To prevent ignition of hazardous atmospheres, keep cover bolts tight while circuits
are live. Disconnect supply circuit before opening.
Entry into the actuator housing is made through one of the NPT conduit entries. Electrical data connec-
tions are made to a captive screw cage terminal strip located on the Modbus RTU board. Electrical
power (120 VAC) and limit switch connections are made to the actuator terminal strip.
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