GAI-Tronics 370-201, 372A Interface Amplifier Assembly - Manual (Page 3)

Pub. 42004-019D
Model 370-201 Interface Amplifier Assembly Page: 3 of 9
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Wiring a Model 370-201 between a Page/Party ® System and Telephone Lines
GAI-Tronics 60038-101 eight conductor cable is recommended for 372A enclosure connections. This
cable contains a 14 AWG twisted pair for power connections (24 V dc or 120 V ac), a single 14 AWG
ground wire, an 18 AWG pair for GAI-Tronics page or party line connections, and three spare 18 AWG
wires (one twisted pair plus single wire). If other cable is used, make sure that the audio wires
(GAI-Tronics Page/Party
®
line) are twisted pairs; shielded pairs 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 be connected to either the page line or to a party line on a GAI-Tronics Page/Party
® system and
terminal 7 and 8 are connected to the incoming telephone line.
N OTE : Any party line can be selected.
Figure 2. 120 V AC 50/60 Hz Power Connection
Figure 3. 24 V DC Connection with Negative Ground