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
The Model 703-006 Multi-Party Amplifier Enclosure is a component of the 700 Series Page/Party
system. This enclosure is configured for multi-party systems and can accommodate conversations on up
to five party lines simultaneously.
The Model 703-006 is constructed of fabricated steel and is extremely weatherproof and corrosion-
resistant. It is equipped with terminal strips for connecting system cable. The Page/Party
®
Series
amplifiers mate directly with this enclosure.
Installation
CAUTION
Do not install this equipment in hazardous areas or areas other than those
indicated on the approval listing in the Specification section of this manual. Such installation may
cause a safety hazard and consequent injury or property damage.
WARNING

Do not disconnect equipment while energized.
Insure proper grounding to protective earthing.
When installing an add-on station, consult the appropriate system layout diagrams. These figures, when
used in conjunction with the station installation information and cable layout guide, should provide all the
information necessary to install additional Page/Party stations.
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 system
connection diagrams. Pub. 42004-367A
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System layout and power cable length are very important when installing Page/Party equipment.
Although it varies for different systems, the general guideline is that the total power cable length should
not exceed 1 mile (5280 feet) for 120 V ac systems. The total cable length is the most important
consideration while cable length between the stations is generally not a factor.
Mounting
The Model 703-006 Enclosure is not supplied with conduit or cable openings. Drill or punch these
openings using the template supplied before mounting the enclosure. Whenever possible, do not enter an
enclosure from the top: side or bottom entry helps to prevent moisture from dripping onto the terminals or
PCBAs. The best location for conduit holes is along the bottom of the enclosure near the rear surface.
Avoid the top center, as it may interfere with the plug-in amplifier receptacle.
For specific details including mounting hole dimensions, refer to Figure 1. When mounting the
enclosure, use caution to avoid damaging the terminal blocks inside. The suggested mounting height for
all station enclosures is 54 inches (137 cm) up to the centerline of the enclosure.
For continued IP 66 protection, torque setting for securing the amplifier to the enclosure should be 10 to
12 in-lbs. or 1.13 to 1.36 n-m.

Figure 1. Model 703-006 Enclosure Mounting Details Pub. 42004-367A
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Wiring
Attach the conduit to the enclosure. Feed the wiring through the conduit and bring it into the enclosure.
See Figure 2. Follow the wire colors carefully because the colors correspond to GAI-Tronics multi-party
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.
CAUTION

For safe operation, connect terminal 3 of TB1 to system ground.
Local Muting
Figure 2 illustrates local speaker muting when stations are completely assembled and paging operation
occurs. Normally, when the station button is pressed, the paging speaker connected to that station is
silenced (muted) to prevent acoustic feedback to the handset microphone. However, while the handset is
in use for party line conversations, the paging speaker is live to enable paging calls from other stations.
To disable the mute feature, follow these instructions:
1.

Locate the lugged violet wire attached to terminal point 7 (mute) on the terminal block within the
enclosure.
2.

Transfer the lugged violet wire to terminal point 8 (Page L1).
After any muting changes are made, unpack the station amplifier and install.
Mutual Muting
In the event that feedback occurs within an area and repositioning of the system speakers does not help,
mutual muting may be used to correct this problem.
The following steps mutually mutes adjacent amplifiers/handsets within a zone.
1.

Ensure that the purple lugged wire is connected to terminal 7 of TB1.
2.

Connect terminal TB1-7 of the handset station to TB1-7 of the station within the zone that is causing
feedback. This is done by using the spare system wire (orange conductor) from within the system
cable that runs between the stations. Pub. 42004-367A
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Figure 2. Wiring Diagram Pub. 42004-367A
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Maintenance
Regular inspection and a good preventive maintenance program will increase the reliability of your
GAI-Tronics station. The GAI-Tronics Field Service Department can formulate a service contract suited
to your facilitys specific need for preventive maintenance.
In addition, the following procedure can be used to keep Page/Party
®
systems operating effectively.
WARNING
Before performing any of the following preventive maintenance steps, remove
all power from the station.
1.

Remove the amplifier from the enclosure.
2.

Visually check the interior of the enclosure for signs of contamination such as dust, condensation or
process liquid.
3.

Using the No. 10440-002 Maintenance Cable, plug the amplifier into the connector in the enclosure.
Check, and if necessary, adjust the amplifier to maximize performance.
4.

Reinstall the amplifier in the enclosure. Ensure that all gaskets and hardware are in place. Failure to
install the gaskets, which also act as spacers, can result in damage to the connectors on the amplifiers
and inside the enclosures and can cause system faults.
It may become necessary to re-terminate some or all of the enclosures in a system. If so, strip the wires
back to clean copper and connect only one wire to each connector to allow for easier future
troubleshooting.
Troubleshooting
The following table lists some hints to aid technicians in troubleshooting.
Problem Solution
Feedback occurs
only during
page.
1.

If a speaker is close to the station, try using the muting feature in the amplifier
enclosure at the terminal blocks. Connect the violet wire at TB1-8 to TB1-7.
Refer to the wiring diagram.
2.

Ensure that speakers attached to other stations located nearby are not pointed
in your direction. If changing the orientation of the other speakers has no
effect, mutual muting may be required. Mutual muting silences all the
speakers within proximity to the affected stations during a page from any one
of the mutually muted stations.
Connect the orange wire (spare) to the TB1-7 of all the stations to be mutually
muted. N
OTE
: If too many stations are selected, paging coverage can be
adversely affected.
3.

Check line terminations at the line balance assembly. Line balance assembly
connections are critical.
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.
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Specifications
Construction/Finish ............................................................. 16-gauge cold-rolled steel; gray polyurethane
Mounting ...........................................................Wall or column, four 0.31-inch (7.8 mm) mounting holes
Connections .............................................................................Internal screw-type barrier terminal blocks
External controls ..................................................................................................... Rotary selector switch
Dimensions ........................................................... 13.8 H
× 8.1 W × 5.1 D inches (350 × 206 × 129 mm)
Temperature, operating and storage ....................................................(-22 ºF to +158 ºF) -30 ºC to +70 ºC
Shipping weight .............................................................................................................. 7.5 lbs. (3.4 kg)
Approvals
Enclosure M