42004-156D
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 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® handset stations are designed to provide safe and clear
communications in hazardous areas, even in high-noise situations. 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 includes a front-panel push button for paging, a 6-foot PVC coil cord, a noisecanceling microphone for reduced transmission of background noise, and sidetone circuitry to reduce
amplification of the user’s voice and background noise 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 weatherproof stations include a nonmetallic housing with a front
door. This installation manual 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 maintain the explosion-proof integrity of
the stations. The appropriate publication is packed with each station.
WARNING
Explosion Hazard – Do not connect or disconnect equipment unless power has
been switched off or the area is known to be non-hazardous.
GAI-Tronics Corporation P.O. Box 1060, Reading, PA 19607-1060 USA
610-777-1374 „ 800-492-1212 „ Fax: 610-796-5954
VISIT WWW .GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
Pub. 42004-156D
Page: 2 of 12
Installation
Whether installing an entire system or only an add-on station, consult the system layout diagrams at the end
of this manual. These figures, used in conjunction with the station installation information and the cable
layout guide, should provide all the information necessary to install the Page/Party® stations. These figures
do not show an explosion-proof station; however, the basic points of the system layout and design still
apply.
NOTE
A separate power feed is recommended for Page/Party® stations in Div.1 areas. With a
separate power feed, the Page/Party® stations can be shut off for maintenance without disrupting the power
supply to the other equipment in the Div. 1 area.
Enclosure Placement
All GAI-Tronics Page/Party® units are wired in parallel. Good system layout design minimizes the cable
required for each installation. GAI-Tronics multi-conductor cable, designed especially for this application,
is recommended. The number, size, and color-coding of conductors are listed in the accompanying system
connection diagrams.
System layout and power cable length are important considerations when installing Page/Party® equipment.
The rules 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 important consideration.
Mounting
To maintain the explosion-proof integrity of these stations, all mounting hardware is located outside the
aluminum enclosure. The suggested mounting height for all station enclosures is 54 inches (137 mm) up to
the centerline of the enclosure.
Indoor Station: Mount the indoor unit using the two mounting straps on the rear of the enclosure. Refer to
Figure 1. Use the standard 3/8-inch bolts to secure the enclosure to the mounting surface. Secure the two
bottom bolts first, then the top bolts. The mounting strap design allows the station to be removed from its
mounting surface by removing only two of the bolts.
Outdoor Station: The outdoor model stations are shipped with a separate glass-reinforced polyester
enclosure with a front door. This enclosure has four 0.44-inch diameter mounting feet in the 4 corners and
is suitable for mounting to many types of surfaces. Refer to Figure 2.
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
Figure 1. Mounting details for indoor stations
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Pub. 42004-156D
Page: 3 of 12
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
Pub. 42004-156D
Page: 4 of 12
Figure 2. Mounting details for outdoor stations (multi-party station shown)
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
Pub. 42004-156D
Page: 5 of 12
Conduit Installation
Refer to Pub. 42004-184 (US), 42004-238 (Canada) 42004-239 (Canada), as applicable. These
publications detail how to maintain the integrity of the explosion-proof stations.
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-inch wrench to open the front cover to access the Termination
PCBA. Refer to Pub. 42004-184 (US), and 42004-238 (Canada) or 42004-239 (Canada), as applicable
for wiring details.
Feed the wiring through the conduit and into the enclosure. Follow the wire colors carefully—these colors
correspond to GAI-Tronics 60029 or 60038 Series cable. The wires must be spade-lugged and connected
carefully and completely to the terminal block. An improper termination may result in diminished station
performance.
Before closing the station cover, plug the power interconnect cable from the front of the enclosure into the
connector on the power supply card in the rear enclosure.
NOTE
All the bolts must be installed to maintain the integrity of the explosion-proof
construction.
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Pub. 42004-156D
Page: 6 of 12
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
Speaker Muting Information
These stations are equipped with a muting feature that is used if the station is located near other
handset/speaker stations. This feature prevents acoustic feedback between stations during paging by
muting the station’s associated speaker. These stations are shipped from the factory with the mute feature
enabled.
To disable the muting feature, remove jumper W6 located on the 10489-001 Termination PCBA. The
chart below describes how the muting function operates when specific combinations of wire jumpers W3,
W4, W5, and W6 are installed on the Termination PCBA.
W3
W4
W5
W6
O
X
X
X
The AUX/PAGE inputs to the amplifier are muted during station page
(as shipped from GAI-Tronics).
O
X
X
O
The AUX/PAGE inputs to the amplifier are not muted during a station page.
O
X
O
X
Mute the PAGE input only during a station page.
X
X
O
X
The PAGE input is muted during a station page or by contact closure between
the Mute A and B inputs.
X
O
X
X
The PAGE/AUX inputs are muted during a station page or by contact closure
between the Mute A and B inputs.
X
O
O
O
The PAGE/AUX inputs are not muted. Isolated normally open relay contact
output between the Mute A and B terminals is closed during station pages.
X = Installed
Description of Muting Function Operation
O = Not Installed.
Mutual Muting
Stations that are located closely together may require mutual muting of the page amplifiers. To set up
mutual muting between stations, connect the orange (spare) wire in the GAI-Tronics station cable to TB211(A) on each of the Div. 1 stations that require muting. All the mutually muted stations are then muted
when any connected station is paging.
NOTE: Jumpers W4, W5, and W6 must be installed.
Mutual muting can be accomplished between the Div. 1 stations and Div. 2 enclosures using most
GAI-Tronics 600 or 700 Series enclosures by connecting the orange (spare) wire between TB2-11(A) on
the Div. 1 station and TB1-7 on the Div. 2 enclosure:
Div. 1 Stations
Div. 2 Enclosures (TB1-7)
TB2-11(A)
7805-001
702A
758-001
780-001
732-101
703A
670-001
7325-101
733-001
7335-001
Consult GAI-Tronics for any enclosures not listed.
NOTE: The auxiliary speaker amplifier input is a balanced 10 kilohm audio input.
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
Pub. 42004-156D
Page: 7 of 12
Operation
GAI-Tronics offers two types of Page/Party® systems: Single party with one page line and one party line,
and multi-party with one page line and five party lines allowing up to five simultaneous two-way
conversations.
For single party systems, complete the following steps to make a page announcement:
1. Lift the handset from the cradle.
2. Depress and hold the handset pressbar.
3. Speak directly into the microphone to broadcast your announcement over the loudspeakers.
4. Release the handset pressbar, and if requested, wait for a response.
The paged individual(s) responds by picking up a station handset.
For multi-party systems, complete the following steps to make a page announcement:
1. Lift the handset from the cradle. If party line conversation is desired, rotate the selector switch to an
unoccupied party line.
2. Depress and hold the handset pressbar.
3. Speak directly into the microphone to broadcast your announcement over the loudspeakers.
4. Release the handset pressbar, and if requested, wait for a response.
The paged individual(s) responds by picking up a station handset and turning the selector switch to the
requested party line.
With either type of system, the full duplex party line communication is not broadcast over the system
speakers. Other individuals can also pick up and join the conversation at any time. Always return the
handset to the cradle following a page or a party line conversation.
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
Pub. 42004-156D
Page: 8 of 12
Maintenance
The following adjustments are accessible through the rear amplifier chassis using a small screwdriver. The
handset/speaker amplifier section must be completely removed from the enclosure to access these controls.
A silk-screen on the rear of the amplifier identifies the following controls.
•
Microphone Gain: adjusts the gain level from the microphone signal to the page or party lines.
•
Receiver Sidetone: adjusts the amount of signal transmitted from the microphone to the receiver. To
properly adjust the sidetone, blow into the handset microphone while turning the sidetone adjustment.
The sidetone is correctly set when the person blowing into the handset can barely hear themselves.
•
Receiver Volume: adjusts the gain level from the party line to the receiver.
•
Speaker Volume: adjusts the volume level of the speaker (if any) associated with this station.
Troubleshooting
The following table lists some hints to aid technicians in troubleshooting.
Problem
Solution
Outgoing conversation level
requires adjustment.
Adjust the microphone gain at the amplifier.
Incoming conversation level
requires adjustment.
Adjust the receiver volume control at the amplifier.
Sidetone (how the operator
hears himself) requires
adjustment.
1. Adjust the receiver sidetone at the amplifier.
Feedback occurs only during
page.
Ensure the muting feature is enabled. See the Mutual Muting section of
this manual for details.
Crosstalk occurs.
One or more system cable pairs may be improperly terminated. Visually
inspect the system cable connections for accidental crossing of the cable
pairs or grounds.
2. Check that the system cable connections to the resistors in the line
balance assembly are properly terminated.
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
Pub. 42004-156D
Page: 9 of 12
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 VRMS) 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
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
Pub. 42004-156D
Page: 10 of 12
Replacement Parts
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 Hinge Kit
„
„
„
„
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
„
„
„
„
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Pub. 42004-156D
Page: 11 of 12
Model 780/785-001 and 7805/7855-001 Explosion-proof Handset Stations
\\s_eng\gtcproddocs\standard ioms - current release\42004 instr. manuals\42004-156d.doc
03/04
Pub. 42004-156D
Page: 12 of 12
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)
Was this manual useful for you? yes no
Thank you for your participation!

* Your assessment is very important for improving the work of artificial intelligence, which forms the content of this project

Download PDF

advertisement