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

Confidentiality notice, General information

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Pub. 42004-157E

GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA

610-777-1374

 800-492-1212  Fax: 610-796-5954

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GAI

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TRONICS

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G A I - T R O N I C S ® C O R P O R A T I O N

A H U B B E L L C O M P A N Y

Model 780-002, 785-002, 7805-002,

and 7855-002 24 V DC

Explosion-proof Handset Stations

Confidentiality Notice

This manual is provided solely as an operational, installation, and maintenance guide and contains
sensitive business and technical information that is confidential and proprietary to GAI-Tronics.
GAI-Tronics retains all intellectual property and other rights in or to the information contained herein,
and such information may only be used in connection with the operation of your GAI-Tronics product or
system. This manual may not be disclosed in any form, in whole or in part, directly or indirectly, to any
third party.

General Information

GAI-Tronics hazardous area Page/Party

®

24 V dc handset/speaker stations are designed to provide safe

and clear communications even in high-noise areas. These models are NRTL certified for use in the US
and Canada for the following areas: Class I, Div. 1, Groups C and D; Class II, Div. 1, Groups E, F, and
G; and Class III, Div. 1.

Each of these models include a front-panel push button for paging, a durable 6-foot PVC coil cord, a
noise-canceling microphone for reduced transmission of background noise, and sidetone circuitry to
reduce amplification of the user’s voice into their earpiece. An electrical safety barrier mounted inside
the housing creates an intrinsically-safe handset. Multi-party stations include a durable rotary switch for
party line selection. The following models are covered by this instruction manual:

Model Description

780-002

Explosion-proof Handset Station, indoor, 24 V dc, single party

7805-002

Explosion-proof Handset Station, indoor, 24 V dc, multi-party

785-002

Explosion-proof Handset Station, weatherproof, 24 V dc, single party

7855-002

Explosion-proof Handset Station, weatherproof, 24 V dc, multi-party

This installation manual provides instructions on both the placement and mounting of the stations. Refer
to Pub. 42004-182, which shows the conduit installation and station wiring details necessary to maintain
the explosion-proof integrity of the stations.

WARNING

Explosion Hazard – Do not connect or disconnect equipment unless power

has been switched off or the area is known to be non-hazardous.