GAI-Tronics 370-201 User Manual
Pub. 42004-019D
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Model 370-201
Interface Amplifi er Assembl y
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 i al and p roprietary to G AI-Tronics. GAI-Tronics
retains a ll intellectual pr operty and other rights in or to t he inf ormation c ontained herein, and s uch
informa tion may only be used in connection wit h the operation of you r GAI- Tronic s pr oduct or system.
This ma nual may not be disclosed in any form, in whole or in p art, dir ec tly or indirectly, to any t hird pa rty.
General Information
The Model 370-201 Interface Amplifier allows GAI-Tronics’ Page/Party® systems to interface with
standard private telephone net works. This unit inter c onnects two voice circuits that are dissimilar in
voltage and/or impedance. The interface amplif ier is not just a matching transformer; it also includes a
gain a djustment t hat compens ates f or differ ences in signal levels, or permits use with a range of signal
level. It can also be used in other paging systems.
Consisting of:
Model No.
370-201 371-201 372A
Amplifier Enclosure
Installation
WARNING
Do not install the Model 370-201 in hazardous areas; such installation may cause a safety hazard and
consequent injury or property damage.
Enclosure Placement
Installation, adjustment, and maintenance of the Model 370-201 Interface Amplifier Assembly is easier if a
Page/Party
panel nea r a Page/Party
Assembly.
®
handset station is mounted close by. The Model 370-201 should be mounted on a wall or
®
handset station and within 300 feet of the Model 305-001 Line Balance
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
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Figure 1. Model 372A Indoor Enc l osur e M ounting
Mounting
The indoor enclosur e is not supplied with openings for condu it or cable. Drill or punch these openings
using t he s upplied t emplate before mounting the enclosure. W e recommend placing the conduit holes nea r
the rea r sur fac e o f the top o r bo tto m of the enclos ure. Avoid the t op center, as it may i n ter fere wi th t he
plug-in amplifier receptacle.
There are four 5/16-inch diameter mounting holes in the corners of the Model 372A Amplifier Enclosure
See Figu re 1. W hen mount i ng the enclosure, use cau tion to a void damaging the terminal blocks ins ide.
The suggested mounting height for all station enclosures is 54 inches (137 cm) to the bottom of the
enclosure.
Connect the conduit to the enclosure, and then feed the wiring through the condu it into t he enclosure.
When wiring t he s tat ion, follow the wire colors carefully. The color s noted in Figure 2, Figu re 3, and
Figure 4 correspond to GAI - Tronics 60038 Series cable. The wires should be spade-lugged and connected
properly to the termina l block. An improper terminat ion may resu lt in diminished station p erformance.
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Wiring a Model 370-201 between a Page/Party® System and Telephone Lines
GAI-Tronics 60038-101 eight conductor ca ble is r ecommended for 372A enclosure connections. This
cab l e contains a 1 4 AWG twisted pair f or power c onnec tions (2 4 V dc or 120 V ac), a single 14 AWG
ground wire, an 18 AW G pair for G AI - Tr onic s pa ge or pa rty line connections, and three spa re 18 AW G
wires ( one t wis ted pair plu s single wire) . If ot her cable is us ed, make sure that the au dio wires
®
(GAI-Tronics Page/Par t y
line) ar e t wis ted pairs; shielded pair s are not necessary.
Figure 2, Figure 3, and Figure 4 show the various wiring configurations and the suggested wire colors from
the GAI-Tronics 60038-101 cable. If a Model 370-201 Interface Amplifier Assembly is used, TB1 5 and 6
®
can b e connected to either the pa ge line or to a par ty line on a GAI - Tronic s Page/Party
system and
termina l 7 and 8 are connected to the incoming telephone line.
OTE: Any party line can be s elected.
N
Figure 2. 120 V AC 50/60 Hz Power Connection
Figure 3. 24 V DC Connect ion with Negative Gr ound
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