GAI-Tronics 780-301 User Manual
Pub. 42004-638L2
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Model 780-301 and 7805- 301 Page/Party®
Handset St ations
for Cenelec Zone 1 A pplications
Confidentiality Notice
This manua l is provide d sole ly as an operatio nal, installation, and ma inte nance guide and conta ins
sensitive business and t e chnical informatio n tha t is confidentia l and pr opri et ary 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 manu al may not be dis clos e d in any form, in whole or in pa rt, direct ly or i ndir ectly, to a ny
third pa r ty.
General Information
The assembly described in this manual is a speaker/amplifier housed in an explosion-proof cast aluminum
enclosure equipped with a hands et. The assembly is designed to be i nsta lled in hazardous areas where
combu stible gases ex ist or may exis t.
The aluminum enclosure, while not gas tight, is designed to withstand repeated internal explosions
without expelling gases hot enough to ignite the external atmosphere. This is accomplished through the
use of a precision machined flame-path opening that cools the exiting gases to a temperature below the
flash point of the external, exp losive atmosp here.
Application
The ha za r dou s ar ea Pag e/P a r ty® Handset S tat ion pro vides clear paging communications even in hig h
noise areas where explosive atmospheres exist or may exist. The Model 780-301 Single Party Handset
Station and Model 7805-301 Multi-party Handset Station are BASEEFA approved to CENELEC
Standards Ex dib for Zone 1 Group IIC T5.
GAI-Tronics Corporation P.O. Box 1060, Readi ng, PA 19607-1060 USA
610-777-1374 800-492-1212 Fax: 610-796-5954
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
V
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Model 780/7805-301 P age/Party
®
Handset Stations f or Cenelec Z one 1 Appli c ations Page: 2 of 15
Hardware Configuration
Exter nal
When the handset is removed from th e cradle, a magnetic r eed switch in the cra dle ta k es t he st ation
off-hook. In a ddition to the ha ndset and cord, a push- to-p age bu tton a nd a label are loca ted o n the front
cover. On the multi-party stations, a 5-party line selector switch is also included. See Figure 1.
®
Figure 1. Model 7805-301 Page/Party
Handset S tation - Front View
The cable gland entries for Models 780-301-and 7805-301 are shown in Figure 2. The following entries
are on the base: three M25 entries (two fitted with plugs); and one M16 entry.
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®
Handset Stations f or Cenelec Z one 1 Appli c ations Page: 3 of 15
Pub. 42004-638L2
Figure 2. Models 780-301 and 7805-301 Cable Gland Entries - Bottom View
N
OTE: Ensure any unused openings are sealed with proper fittings per local standards.
Figure 3. Plug-in Amplifier - Side View
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Model 780/7805-301 P age/Party
Block Di agram
®
Handset Stations f or Cenelec Z one 1 Appli c ations Page: 4 of 15
Pub. 42004-638L2
Figure 4. Model 701-202-EX Handset Station Block Diagram
P1 is the 16-pin male connector located on the back of the Base-16 printed circuit board assembly
(PCBA). It plugs into the socket located inside the enclosure. The socket provides connection to the
multi-party or single party cable containing the Page/Party
®
lines and ac power. The handset amplifier
PCB A connec ts t o the ha ndset and re e d swit ch using lug conne c tions E1 t o E7. S e e Figure 4.
Interfaces
The as sembly inter faces to t he multi-party cable a nd t he ex terna l loudspeak er via P 1, t h e 16- pin
connector, and connector J1. The pin functions for connector P1 are described below:
Pin No. Function Description Pin No. Function Descrip tion
1
2
3
4
5
6
PL_L1
PG_L1
MT_L1
N/C
SPKR_8
SPKR_16
Party line (L1) 9
Page line (L1) 10
Mute (L1) 11
No connection 12
Speaker (8-ohm) 13
Speaker (16-ohm) 14
PL_L2
PG_L2
MT_L2
N/C
EGND
SPKR_C
Party line (L2)
Page line (L2)
Mute (L2)
No connection
Ear th ground
Speaker (common)
7
8
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N/C
AC_N
No connection 15
AC neutral 16
N/C
AC_H
No connection
AC ho t
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Model 780/7805-301 P age/Party
®
Handset Stations f or Cenelec Z one 1 Appli c ations Page: 5 of 15
Installation
Before installing Page/Party® equipment, design the system layout taking into consideration personnel
safety, operational function, convenience, and power cable length. In general, for 115 V ac systems the
total cable length should not exceed one mile (1.6 kilometer), but the length of cable between the stations
is not a crit ical fa c tor.
A separat e power feed is recommended to each station l oca t ed i n ha zardous ar eas . Wit h a separate feed,
individual stations can be de-energized for service or maintenance without affecting the power supply and
oper atio n of th e other sta tions i n the hazardous area.
Figure 5. Mounting holes with dimensions in inches (mm)
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