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Instruction Manual
245364-V
May 2002
Rosemount Analytical Inc. A Division of Emerson Process Management Description and Specifications 1-5
Model 755A
c. Electrical
Supply Voltage and Frequency
Standard ................................ 115 VAC ±10 VAC, 50/60 Hz
Optional ................................. 230 VAC ±10 VAC, 50/60 Hz
Power Consumption
Maximum ............................... 300 watts
Nominal.................................. 75 watts
Output
Standard ................................ Field selectable voltage output of 0 to 10mV, 0 to 100mV, 0 to 1V,
or 0 to 5VDC
Optional ................................. Isolated current output of 0 to 20mA or 4 to 20mA (with Current
Output Board)
Alarm Option.................................. High-Low Alarm
Contact Ratings..................... 5 amperes, 240V AC, resistive load
5 amperes, 120V AC, resistive load
5 amperes, 28V DC, resistive load
Setpoint ......................................... Adjustable from 1% to 20% of fullscale
Deadband...................................... Adjustable from 1% to 20% of fullscale (Factory set at 10% of
fullscale)
d. Physical
Mounting
Standard ................................ Panel mount
Optional ................................. Surface or stanchion mount accessory available
Enclosure Classification ................ Meets requirements for NEMA 3R
Air Purge Option
1
................... NFPA 496 (1989) Type Z purge
Weight ........................................... Approximately 32.5 lbs (14.74 Kg)
Dimensions.................................... Height: 13.5 (343 mm)
Width: 11.5 (294 mm)
Depth: 7.12 (181 mm)
1
When installed with user supplied components, meets requirements for Class I, Division 2 locations per National Electrical
Code (ANSI/NFPA 70) for analyzers sampling nonflammable gases. Analyzers sampling flammable gases must be pro-
tected by a continuous dilution purge system in accordance with Standard ANSI/NFPA 496-1986, Chapter 8. Consult factory
for recommendations.