GAI-Tronics 370-400 User Manual
Pub. 42004-432D
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Model 370-400 UHF and 370-420 VHF
Page/Party
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
Product Overview
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Radio Couplers
The Model 370-400 UHF and 370-420 VHF Page/Party®
Radio Couplers allow for a GAI-Tronics Page/Party
communicate with wireless radio systems. Radio users,
located outside the facility at a remote location or inside a
plant, can communicate with Page/Party
The Coupler works as a half duplex system in that audio is
only heard in one direction at a time. The current audio path
takes precedent over the system and the other audio path
cannot engage until the current audio path releases control.
The audio path to the Page/Party
carrier detect signal from the radio. A VOX circuit that
monitors the audio level on the page or party line, whichever is
currently active, gates the audio path to the radio.
The Coupler converts audio levels from the Page/Party
system to the appropriate radio signal levels that are then
transmitted on a defined carrier frequency programmed into
the radio. The Page/Party
characteristics of the Page/Party
audio line or page line audio to the radio. Party line audio
takes precedence over page line audio.
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Radio Coupler senses off-hook
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system and routes party line
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users.
system is gated by the
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system to
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Figure 1. Outline of Model 370-400
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The Coupler converts the radio signal to the appropriate signal levels for the Page/Party
module has a relay output that activates during the presence of the programmed carrier frequency.
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: 610-796-5954
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
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system. The
Pub. 42004-432D
Model 370-400 UHF and 370-420 VHF Page/Party
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Radio Couplers Page: 2 of 13
Features
• 85–264 V ac or 24 V dc power operation
• Hybrid circuitry to eliminate unwanted sidetone
• Individual volume adjustment to and from the radio
• Off-hook detection on party line
• 16-level VOX detection circuitry for monitoring page or party line audio
• 33-ohm termination internal to unit
• Eight selectable programmed radio frequencies
• Selectable high or low radio output power
• Relay output activated by radio received carrier frequency
Radio Frequenc y Programming
Before unit installation in the field, the operating frequencies of the system must be programmed into the
radio. To do this the radio programming software must be installed on a PC.
Radio Programming Software inst allation
Place the CD in the computer CD-ROM drive. Select the Start button; then select Run. At the prompt,
type x:\fscommand\setup.exe where x represents the drive letter that is associated with your CD-
ROM drive. A DTXL_PCPS icon should appear on the desktop display after successful installation.
Opening the Station
Remove the four screws from the front panel and remove the front panel from back enclosure.
Connecting the Programming Cable to t he Radio
1. Unplug the Page/Party
2. Connect the DTXP-PAC cable assembly’s 15-pin D-connector into the radio.
3. Connect the RJ11-style plug of the 9/RTC-PAS cable into the mating receptacle on DTXP-PAC
cable.
4. Connect the DB-9 to DB-25 adapter to the other end of the 9/RTC-PAS cable.
5. Connect the DB-9 connector of the cable assembly to the computer serial port.
6. Connect the red and black leads of the 9/RTC-PAS cable to a 12 V dc source (battery or power
supply), observing the polarity (red +, black−).
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Radio Coupler’s 15-pin D-connector from the radio.
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Pub. 42004-432D
Model 370-400 UHF and 370-420 VHF Page/Party
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Radio Couplers Page: 3 of 13
Programming the Radio
1. Make sure the radio to be programmed is powered and connected to the PC (as described above)
before starting the programming software on the PC.
2. Start radio programming software on the PC.
3. Enter the receive (Rx) frequency and transmit (Tx) frequencies for each channel. To enter the
frequency, select the channel, then the Edit
button on the left.
4. Enter the Rx Frequency, Tx Frequency and select a Quiet Call (QC) frequency or Digital Quiet Call
(DQC) code, if desired.
5. After entering the frequency and optional QC or DQC, program the radio by selecting Radio >
Program Radio from the tool bar.
6. After the radio is programmed (time bar will disappear), disconnect the programming cable and
reconnect the radio to the 69574-001 PCBA.
Attaching the Front Panel
After attaching the radio cable, place the front cover on the rear enclosure, being careful not to pinch any
cables. Secure the front cover using the four screws and washers provided. Torque the screws to 10–12
in-lbs (1.13–1.36 n-m).
Installation
Important Safety Instructions
1. Read, follow, and retain instructions – All safety and operating instructions should be read and
followed before operating the unit. Retain instructions for future reference.
2. Heed warnings – Adhere to all warnings of the unit and in the operating instructions.
3. Attachments - Attachments not recommended by the product manufacturer should not be used, as
they may cause hazards.
4. Servicing – Do not attempt to service this unit by yourself. Opening or removing covers may expose
you to dangerous voltage or other hazards. Refer all servicing to qualified service personnel.
5. This permanently connected apparatus must have a UL Listed 15-amp circuit breaker incorporated in
the electrical installation of the building.
USA and Canada Consult the National Electrical Code (NFPA 70), Canadian Standards Association
(CSA 22.1), and local codes for specific requirements regarding your installation. Class 2 circuit wiring
must be performed in accordance with NEC 725.55.
WARNING
In 24 V dc systems: Under NO condition should this equipment be operated
from a battery charger without the batteries connected.
In 24 V dc systems, most chargers have an unloaded output of 35 to 45 volts that can quickly damage the
equipment designed for nominal 24 volts. The maximum battery voltage should never exceed the
maximum specified input voltage.
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Model 370-400 UHF and 370-420 VHF Page/Party
Mounting the Enclosure
1. Mount the enclosure using the four 0.312-
inch (8 mm) diameter holes located on the
mounting flanges with ¼-inch (M6)
hardware. The Page/Party
is not supplied with conduit or cable
openings.
2. Remove the front panel and drill or punch
entry openings in the rear section of the
enclosure.
3. Refer to Figure 2 for the suggested
locations. There must be a minimum of ½
inch (13 mm) of material between entry
holes. GAI-Tronics recommends bottom
entry only wherever possible.
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Radio Coupler
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Radio Couplers Page: 4 of 13
Pub. 42004-432D
The standard orientation shown in Figure 2
locates the power supply housing in the
upper left corner. The orientation of the
enclosure can be rotated 180º to allow clear
access to the top. For specific details
including mounting hole dimensions, refer to
Figure 2. When mounting the enclosure, use
caution to avoid damaging the internal
components.
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Figure 2. Mounting Details and Wire Entry Locations
Pub. 42004-432D
Model 370-400 UHF and 370-420 VHF Page/Party
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Radio Couplers Page: 5 of 13
Installing the Antenna
1. Select an appropriate antenna based upon the frequency of the radio and connect it to the BNC
connector on the top of the enclosure. Refer to Figure 3.
2. The antenna should be remotely mounted in a location that provides line-of-sight communication to
the surrounding area. Refer to the “Specifications” section for specific RF module frequency
information.
Figure 3. Antenna Connection
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