Pub. 42004-156D
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Model 780-001, 785- 001, 7805-001, and
7855-001 Explosion-proof Handset Stations
Confidentiality Notice
This manual is pr ovided s olely as a n op erat ional, installation, and maintenance guide and contains sens itive
bus ines s and t echnic al infor ma tion tha t is confident ial and prop rieta ry to GAI - Tr onic s. GAI- Tr onic s retains
all intellectual prop erty a nd other r ights in or to the information contained herein, and s uch infor ma tion may
only be used in connection with t he op erat ion of your GAI-T ronics produ c t or s ystem. This manu al may not
be disclos ed in any form, in whole or in pa rt, direct ly or indirectly, t o any third party.
General Information
GAI-Tronics hazardous a rea Page/Party® handset stations are desi gned t o provide safe and clear
communicat ions in hazardou s areas, even in high-noise sit u ations . Thes e models are NR TL certified for
use in t he US and C anada for the following areas : Class I, Div. 1, Group s C and D; Clas s II, Div. 1 ,
Groups E, F, and G; and Class III, Div. 1.
Eac h of these models includes a fr ont-panel push button for paging, a 6-f oot PVC c oil c ord, a noisecanceling microphone for reduc ed t ransmission of background nois e, and s idetone circuitry to r edu c e
amplification of the user ’ s voice and b ackgr ou nd noise into their earpiece. An electrical safet y barrier
mounted inside the hou sing creates an intr insically- safe handset. Mult i-party s tat ions include a dura ble
rotary switch for pa rty line select ion. The wea therproof stat ions include a nonmetallic hous i ng with a front
door. This ins tallation manu al covers the following models:
Model Description
780-001 Explosion-proof Handset Station, indoor, 120 V ac, single party
7805-001 Explosion-proof Handset Station, indoor, 120 V ac, multi-party
785-001 Explosion-proof Handset Station, weatherproof, 120 V ac, single party
7855-001 Explosion-proof Handset Station, weatherproof, 120 V ac, multi-party
This manual provides instructions for station placement and mounting. Refer to Pub. 42004-184, 42004238, or 42004-239, as applicable, for information detailing how to maint ain the exp losion-proof integr ity of
the stations . The appropr iate pu blication is packed with eac h station.
WARNING
been switched off or the area is known to be non-hazardous.
Explosion Hazard – Do not connect or disconnect equipment unless power has
GAI-Tronics Corporation P.O. Box 1060, Reading, 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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Installation
Whether insta lling an entir e s ystem or only an add-on s tation, cons ult t he s ystem layout diagrams at the end
of this manual. T hese f igures, used in conjunction wit h the station installation information and the ca ble
layout guide, s hould pr ovide all the information necessary to install the Page/P arty
do not show an explos ion- proof sta tion; however, the basic p oints of t he s ystem layou t and design still
apply.
®
stations. T hes e fi gu res
NOTE
separate power feed, the Page/Party
A separate power feed is recommended for Page/Party® stations in Div.1 areas. With a
®
stations c an be shut off for maintenance wit hout disrup ting the power
supply to the other equipment in the Div. 1 area.
Enclos ure Placement
All GAI-Tronics Pa ge/ Party® units are wired in parallel. G ood system layout design minimizes the cable
required for ea ch insta llation. GAI-Tronics multi-condu c tor cable, des igned especially for this applic ation,
is recommended. The number, size, and color-coding of condu c tors are lis ted in the acc ompanying sys tem
connection diagra ms .
®
System layout and power c able length are importa nt consider ations when ins talling Page/Party
equipment.
The r ules vary for different systems, but generally, the total power cable length should not exceed one mile
(5280 feet) for 115 V ac systems. The length of cable between the stations is not a factor; the total cable
length is the most import ant cons iderat ion.
Mounting
To maintain t he explosion-p roof integrity of these stations , all mounting hardwar e is located outside the
aluminum enclosure. The suggested mounting height for all station enclosures is 54 inches (137 mm) up to
the c en ter l i n e o f the en closur e.
Indoor Station: Mount the indoor unit using the two mounting s traps on the rear of t he enclos ure. Refer t o
3
Figu re 1. Use the standard
/8-inch bolts to secure the enclosure to the mounting surface. Secure the two
bott om b olts first, then the t op bolts. The mounting stra p design allows the stat ion to be removed from it s
mounting surface by removing only two of the bolt s.
Outdoor Station: The out door model stations are shipped with a sepa rate glass-reinforced polyester
enclosure with a f ront door. This enclos ure ha s four 0.44-inch diameter mount ing feet in the 4 corners and
is su itable f or mounting t o ma ny types of s urfaces. Refer to Figure 2.
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Figure 1. Mounting details for indoor sta tions
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Figure 2. Mounting details for outdoor sta tions (multi-part y sta tion shown)
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Conduit Install ation
Refer to Pub. 42004-184 (US), 42004-238 (Canada) 42004-239 (Canada), as applicable. These
pub lic ations detail how t o ma intain t he int egrity of the explosion-proof sta tions.
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NOTE
External conduits in Class I, Groups C and D areas must have gas seals not more
than 18 inches (457 mm) from the station enclosure. External conduits in Class II and Class III areas
must have seals if the conduit system is not dust-tight.
Wiring
After the station is mounted, use a 7/16- inc h wrench to open the fr ont cover to access the Termination
PCBA. Refer to Pub. 42004-184 (US), and 42004-238 (Canada) or 42004-239 (Canada), as applicable
for wiring deta ils.
Feed the wiri ng throu gh the conduit and into t he enclosure. Follow t he wire colors c arefully—thes e colors
correspond to GAI-Tronics 60029 or 60038 Series cable. The wires must be spade-lugged and connected
carefully a nd c omplet ely t o the terminal block. An improper termination may res ult in diminished st ation
performance.
Before closing the stat ion c over, p lug the power interc onnect ca b l e from the front of t he enclosur e into the
connector on the power supply card in the rear enclosure.
NOTE
construction.
All the bolts must be installed to maintain the integrity o f the explosion-proof
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Speaker Muting Inf ormation
These s tat ions are equipped with a muting f eature that is used if the st ation is loc ated near other
handset /speaker stat ions. This feature prevents acoustic f eedback bet ween stat ions dur ing paging by
muting the sta tion’s assoc iated speaker. T hes e s tat ions are shipp ed from the fa ctor y with the mute feature
enabled.
To disable the muting feature, remove jumper W6 located on the 10489-001 Termination PCBA. The
chart below des c ribes how the muting fu nc tion oper ates when s pecific combinations of wire jumper s W3,
W4, W 5, a nd W 6 are insta lled on the Termina tion PC B A.
W3 W4 W5 W6 Description of Muting Function Operation
O
X X X
The AUX/PAGE inputs to t he amplifier are mut ed du ring stat ion page
(as shipped from GAI-Tronics).
O
O
X X
X X
X
O
O
O The AUX/PAGE inputs to t he amplifier are not muted dur ing a st ation p age.
X
Mut e the PAGE input only du ring a sta tion pa ge.
X
The PAG E input is muted du ring a sta tion pa ge or by cont act c losur e b et ween
the Mute A and B inputs.
X
O
X X
The P AG E/AUX inp uts ar e muted during a stat ion page or by contact c losur e
between the Mute A and B inputs.
O O O The PAGE /AUX inputs are not muted. Isolat ed normally open relay cont act
X
outp ut between the Mut e A and B ter minals is c losed duri ng sta tion pa ges .
X = Ins talled O = Not I nsta lled.
Mutual Muting
Stations that are located closely together ma y requir e mutual mut in g of the page amplifiers. To set up
mutual muting b etween sta tions, c onnect the orange (spar e) wire in the GAI- Tronic s station cable t o TB211(A) on each of t he Di v. 1 stat ions tha t require muting. All the mutually mut ed s tat ions are then muted
when any connect ed s tat ion is pa ging.
OTE: Jumpers W4, W5, and W6 must be installed.
N
Mut ual muting can be accomplished between the Div. 1 stat ions and Div. 2 enclos ures using most
GAI-Tronics 600 or 700 Series enclosures by connecting the orange (s pare) wire b etween TB2- 11(A) on
the Div. 1 station and TB1-7 on the Div. 2 encl osur e:
Div. 1 Stations
TB2-11(A)
Div. 2 Enclosures (TB1-7)
7805-001 702A 758-001 7335-001
780-001 732-101 703A
670-001 7325-101 733-001
Consu l t GAI-Tronic s for any enclosu res not listed.
OTE: The auxiliary speaker amplifier input is a balanced 1 0 kilohm audio inpu t.
N
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Operation
GAI-Tronics offer s two types of P age/P arty® syst ems: Single pa rty wit h one p age line and one part y line,
and mult i- party with one p age line and five party lines allowing up to f ive s i multaneous two-wa y
conversations.
For single party systems, complete t he following steps to make a page announcement:
1. Lift the handset f rom the cr adle.
2. Depr es s and hold t he handset pressba r.
3. Speak direct ly into the micr ophone to broadcast your a nnouncement over t he lou dspeakers.
4. Releas e t he handset p ress b ar, and if request ed, wait for a resp onse.
The paged individual ( s) res ponds by picking up a st ation handset.
For multi-party systems, complete the following steps to make a p age annou nc ement:
1. Lift the handset from the cradle. If pa rty line conversation is desired, r otat e the selector switch to an
unoccupied party line.
2. Depr es s and hold t he handset pressba r.
3. Speak direct ly into the micr ophone to broadcast your a nnouncement over t he lou dspeakers.
4. Releas e t he handset p ress b ar, and if request ed, wait for a resp onse.
The paged individual(s) responds by picking u p a station hands et and tu rning the select or swit c h to the
requested party line.
With either type of system, the full duplex part y line communication is not br oadca st over the syst em
spea kers. O ther individuals can also pick up and join t he c onversa tion at any t ime. Always return the
handset to the cradle following a pa ge or a p arty line conversation.
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Maintenance
The following adjustments are accessible through the rear amplifier chassis using a small screwdriver. The
handset /speaker a mplif ier section must be complet ely removed from the enclosure to a c c es s these cont rols.
A silk-screen on the rea r of the amplifier identif ies the following contr ols.
• Microphone Gain: adjusts the gain level from the microphone signa l to the page or part y lines .
• Receiver S i d et o n e: adjusts the amount of signal t ransmitted from the microphone t o the receiver. To
properly a djust the sidetone, blow into the handset microphone while turning the si det one adjustment.
The sidetone is cor rectly s et when the person blowing into the handset can b arely hear t hemselves.
• Receiver Volu me: adjusts the ga in level from the party line to the receiver.
• Speaker Volume: adjust s the volume level of the speaker (if any) a ssocia ted with this sta tion.
Troubleshooti ng
The following t able lists some hints to aid technicians in trou bleshooting.
Problem Solution
Out going c onversation level
requires adju stment.
Incoming convers ation level
requires adju stment.
Sidetone ( how the operator
hears himself) r equ ires
adjustment.
Feedba c k oc c urs only during
page.
Crosstalk occurs. One or more system cable pairs may be improperly terminated. Visually
Adjust the microphone ga in at t he amplifier.
Adjust the receiver volume control at the amplifier.
1. Adjust the receiver sidet one at the amplifier.
2. Check that t he s ystem cab l e connections to the resistor s in the line
balance as sembly ar e p roperly terminated.
Ensure the muting featu re is enabled. See t he M u tua l Muti ng section of
this manual for details.
inspect the sys tem cable connections for ac c idental cross ing of the ca ble
pairs or grou nds.
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Specifications
Power input.............................................. 90–140 V ac; 120 V ac nominal, 50–60 Hz; 0.5 amp maximum
Dimensions:
Indoor sta tions .......... 13.1 H × 7.9 W × 5.6 D (8.9 including handset) inches; (332 × 200 × 143 mm)
Out door st ations........................................ 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
Distortion................................................................................................. 1.5% maximum THD @ 1 kHz
Preset adjustments ..................................................Microphone gain, s idet one adjustment, receiver volume
) output
RMS
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
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Replacement P arts
Part No. Description 780-001 785-001 7805-001 7855-001
10108-007 Handset Assembly, 6-foot coil cord
10108-008 Handset Assembly, 15-foot coil cord
10108-009 Handset Assembly, 25-foot coil cord
10444-003 Weatherproof Enclosure
12251-001 Spring Door Kit
12502-101 Receiver Kit
12504-004 Replacement Door Handle
12505-004 Replacement Door Kit
12505-005 Replacement Door Kit
12511-001 Dynamic Transmitter and Cap
12519-001 Replacement Hook and Hi nge Ki t
12604-001 Fuse, 0.7A, (10 pack)
12604-002 Fuse, 1/16A, (10 pack)
13204-002 Receiver Cap
24201-009 Page Switch Knob
24201-010 Party-line Switch Knob
12542-001 Replacement Front Cover Bolts
(14 pack)
61514-004 Harness Assembly
69012-002 PCBA Handset Safety Barrier
69488-101 PCBA Handset/Speaker Amplifier
69488-102 PCBA Handset/Speaker Amplifier
69489-001 PCBA Termination
12571-001 Maintenance Cover Kit
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Warranty
Equipment. GAI-Tronics warrants for a period of one (1) year from the date of shipment, that any
GAI-Tronics equipment supplied hereunder shall be free of defects in material and workmanship, shall
comply with the then-current product specifications and product literature, and if applicable, shall be fit
for the purpose specified in the agreed-upon quotation or proposal document. If (a) Seller’s goods prove
to be defective in workmanship and/or material under normal and proper usage, or unfit for the purpose
specified and agreed upon, and (b) Buyer’s claim is made within the warranty period set forth above,
Buyer may return such goods to GAI-Tronics’ nearest depot repair facility, freight prepaid, at which time
they will be repaired or replaced, at Seller’s option, without charge to Buyer. Repair or replacement shall
be Buyer’s sole and exclusive remedy. The warranty period on any repaired or replacement equipment
shall be the greater of the ninety (90) day repair warranty or one (1) year from the date the original
equipment was shipped. In no event shall GAI-Tronics warranty obligations with respect to equipment
exceed 100% of the total cost of the equipment supplied hereunder. Buyer may also be entitled to the
manufacturer’s warranty on any third-party goods supplied by GAI-Tronics hereunder. The applicability
of any such third-party warranty will be determined by GAI-Tronics.
Services. Any services GAI-Tronics provides hereunder, whether directly or through subcontractors,
shall be performed in accordance with the standard of care with which such services are normally
provided in the industry. If the services fail to meet the applicable industry standard, GAI-Tronics will
re-perform such services at no cost to buyer to correct said deficiency to Company's satisfaction provided
any and all issues are identified prior to the demobilization of the Contractor’s personnel from the work
site. Re-performance of services shall be Buyer’s sole and exclusive remedy, and in no event shall GAITronics warranty obligations with respect to services exceed 100% of the total cost of the services
provided hereunder.
Warranty Periods. Every claim by Buyer alleging a defect in the goods and/or services provided
hereunder shall be deemed waived unless such claim is made in writing within the applicable warranty
periods as set forth above. Provided, however, that if the defect complained of is latent and not
discoverable within the above warranty periods, every claim arising on account of such latent defect shall
be deemed waived unless it is made in writing within a reasonable time after such latent defect is or
should have been discovered by Buyer.
Limitations / Exclusions. The warranties herein shall not apply to, and GAI-Tronics shall not be
responsible for, any damage to the goods or failure of the services supplied hereunder, to the extent
caused by Buyer’s neglect, failure to follow operational and maintenance procedures provided with the
equipment, or the use of technicians not specifically authorized by GAI-Tronics to maintain or service the
equipment. THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE IN LIEU OF AND
EXCLUDE ALL OTHER WARRANTIES AND REMEDIES, WHETHER EXPRESS OR IMPLIED BY
OPERATION OF LAW OR OTHERWISE, INCLUDING ANY WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Return Policy
If the equipment requires service, contact your Regional Service Center for a return authorization number
(RA#). Equipment should be shipped prepaid to GAI-Tronics with a return authorization number and a
purchase order number. If the equipment is under warranty, repairs or a replacement will be made in
accordance with the warranty policy set forth above. Please include a written explanation of all defects to
assist our technicians in their troubleshooting efforts.
Call 800-492-1212 (inside the USA) or 610-777-1374 (outside the USA) for help identifying the
Regional Service Center closest to you.
(Rev. 10/06)
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