GAI-Tronics 12580-001 Audio Distribution Module - Manual (Page 5)

Pub. 42004-600L2C
Model 12580-001 Amplifier Distribution/Monitor Module Page: 5 of 17
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Interfaces
The Model 12580-001 Amplifier Distribution/Monitor Module provides a number of external interfaces,
all of which are located on the Distribution/Monitor PCBA.
Power
The ADM uses 3-position terminal block TB19 (labeled PWR
IN) to deliver dc power (12 V dc) to the
PCBAs and to provide an earth ground connection for them. Two-position terminal block TB20 (labeled
PWR
OUT) brings out the dc power from TB19, allowing additional Snaptrack ™ modules to receive
power. The pinout for TB19 is shown in Table 1 and the pinout for TB20 is shown in Table 2.
WARNING
Incorrect connection of the power source to TB19 or TB20 may cause damage to this assembly.
Table 1. Power Input - TB19 Pinout
Pin No. Function Description
1
PWR IN +
Connects to the positive lead of the power supply (input)
2
PWR IN −
Connects to the negative (ground) lead of the power supply (input)
3 PWR IN EGND Connects to earth ground (input)
Table 2. Power Output - TB20 Pinout
Pin No. Function Description
1
PWR OUT +
Connects the positive lead of the power supply to other Snaptrack
™
modules (output)
2
PWR OUT −
Connects the negative (ground) lead of the power supply to other
Snaptrack
™ modules (output)
AZI Interface
DB-25 style connector J1 interfaces the Amplifier Zone Interface (AZI) PCBA to the ADM. J1 connects
the six central amplifier input lines, the RS-485 data communication line, and earth ground of the AZI
PCBA to the ADM. The six central amplifier input lines are connected to the following 3-position
terminal blocks: TB2, TB5, TB8, TB11, TB14, and TB17.