GAI-Tronics 785-002 24 V DC Explosion-proof Page/Party Handset Stations - Manual (Page 10)

Pub. 42004-157E
Model 780/785-002 and 7805/7855-002 24 V DC Explosion-proof Handset Stations Page 10 of 13
f:\standard ioms - current release\42004 instr. manuals\42004-157e.doc
08/13
Specifications
Power input ......................................................... 21–29 V dc; 1.2 A (optional negative ground or floating)
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. (15.9 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 ......................................................................
@ 25 V dc: 12 watts minimum into 8- or 16-ohm load
Voltage gain ....................................................................................................... 20 dB minimum, adjustable
Frequency response ............................................................... 250–4,000 Hz; +0/−3 dB ref @ 1 kHz
Distortion .......................................................................................... 1% maximum THD @ 1 kHz/12 watts
Input impedance ......................................................................................... 50,000 ohms minimum @ 1 kHz
Controls, preset adjustments ................................................................................................. Speaker volume
Explosion-proof Enclosure
Material/finish ...................................................................................................... No. 359.2 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