Specifications – GAI-Tronics 780-001 Explosion-proof Handset Stations User Manual
Page 9
Pub. 42004-156D
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
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Specifications
Power input .............................................. 90–140 V ac; 120 V ac nominal, 50–60 Hz; 0.5 amp maximum
Dimensions:
Indoor stations .......... 13.1 H
× 7.9 W × 5.6 D (8.9 including handset) inches; (332 × 200 × 143 mm)
Outdoor stations........................................ 14.6 H
× 10.9 W × 10.5 D inches; (371 × 276 × 226 mm)
Temperature range........................................................................... -22° F to +158° F (-30° C to +70° C)
Shipping weight ........................................................... Indoor: 27 lbs. (12.2 kg); outdoor: 35 lbs. (11.7 kg)
Handset
Material/finish ........................................................................................................................... Gray ABS
Microphone ......................................................................................... 10 ohms, noise-canceling, dynamic
Receiver ...................................................................................................................... 150 ohms, dynamic
Cable........................................................................... Retractile with sealed elbow, 6-foot extended length
Handset Amplifier
Output ...................................................................................................... 1.5 V nominal into 33-ohm load
Gain ............................................................................................................................... 55 dB, adjustable
Frequency response............................................... 250–4000 Hz, +0/-3 dB ref @ 1 kHz (1.5 V
RMS
) output
Distortion ................................................................................................. 1.5% maximum THD @ 1 kHz
Preset adjustments ..................................................Microphone gain, sidetone adjustment, receiver volume
Speaker Amplifier
Output ....................................................................
@
120 V ac: 12 watt minimum into 8- or 16-ohm load
Voltage gain ................................................................................................... 20 dB minimum, adjustable
Frequency response........................................................................... 250–4000 Hz; +0/-3 dB ref @ 1 kHz
Distortion ...................................................................................... 1% maximum THD @ 1 kHz/12 watts
Input impedance....................................................................................... 50,000 ohm, minimum @ 1 kHz
Controls, preset adjustments............................................................................................... Speaker volume
Explosion-proof Enclosure
Material/finish ...................................................................................................................Aluminum alloy
Mounting..................................................................... Wall or column, four 3/8-inch slotted mounting feet
Connections ...............................................................................Internal screw-type barrier terminal blocks
Conduit entry................................ Standard hole size top: ¾ NPT; standard size hole bottom 1½-inch NPT
Weatherproof Enclosure
Material/finish ................................................................................................... Glass-reinforced polyester
Mounting........................................................................................................................... Wall or column
Environmental rating................................................................................................................ NEMA 4X
Approvals
NRTL certified for use in US and Canada ................................................. Class I, Div. 1, Groups C and D
Class II, Div. 1, Groups E, F, and G
Class III, Div. 1