GAI-Tronics 12580-001 User Manual
Pub. 42004-600L2C
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
Model 12580-001
Amplifier Distribution/Monitor Module
Confidential ity 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.
Introduction
This document discusses installing, operating, and maintaining the 12580-001 Amplifier Distribution/
Monitor Module (ADM), which provides the following features:
• Distributes audio to central amplifiers
• Verifies the integrity of speaker loops
• Monitors amplifier failure contacts
• Communicates with the Master Control Unit
How to Use the Assembly
This section describes applications for the Amplifier Distribution/Monitor Module, its hardware
configuration, block diagram, interfaces, and installation. Because this assembly is controlled by a 69254
Series or 69440 Series Master Control Unit (MCU) and is set up in the MCU’s configuration software,
there are no operating controls or software configuration for the ADM. Refer to the MCU Configuration
details in your system manual for all operation information.
Application
The Amplifier Distribution/Monitor Module is used to distribute audio to up to six central amplifiers. It
is also used to verify the integrity of the related speaker loops and to monitor up to six amplifier failure
contacts, reporting their status to the MCU. The ADM’s speaker loop inputs allow it to detect various
fault conditions on any of up to six speaker loops. These fault conditions include ground faults, cable
breaks*, wire-to-wire short circuits*, and amplifier failures.
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The ADM’s contact closure inputs are typically used to monitor the amplifier failure contacts of the
central amplifiers to determine amplifier failure. Figure 1 illustrates a typical application for one paging
zone. Figure 2 illustrates an alternate application for one central amplifier and twelve speaker loops.
OTE: (*) indicates that fault detection occurs only while the associated amplifier is not in use.
N
Figure 1. Single Page Zone - Typical Application
The ADM is comprised of two subassemblies: the 69250-xxx Distribution/Monitor printed circuit board
assembly (PCBA) and the 69248-xxx Central Processing Unit (CPU) PCBA. The ADM mounts in a
Snaptrack™, a grooved plastic channel that allows a PCBA to securely ‘snap’ into place. The
Snaptrack™ provides flexible installation because it may be installed in an equipment rack wherever it is
convenient.
The ADM communicates with the MCU via the CPU PCBA over a bi-directional RS-485 link. The CPU
PCBA monitors the status of the module’s contact clo sure inputs and speaker loop inputs and reports
them to the MCU via this communication link.
The MCU periodically interrogates the ADM to determine its status. The MCU identifies a particular
module on this RS-485 link by its address. (The ADM’s module address is set by rotary hex switch S1,
located on the CPU PCBA.)
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Figure 2. Single Amplifier with 12 Speaker Loops - Alternate Application
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Hardware Configuration
Figure 3. Hardware Configuration
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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 (labe led
OUT) brings out the dc power from TB19, allowing additional Snaptrack™ modules to receive
PWR
power. The pinout for TB19
WARNING
is shown in Table 1 and the pinout for TB20 is shown in Table 2.
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
2
3
PWR
PWR
PWR
IN +
IN −
IN EGND
Connects to the positive lead of the power supply (input)
Connects to the negative (ground) lead of the power supply (input)
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.
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The RS-485 data communications line is connected to J2 (to interface with the CPU PCBA) and to 2position terminal block, TB21. Earth ground is connected to TB19 pin 3. The pinout for AZI interface
connector J1 is shown in Table 3.
Table 3. AZI Interface J1 Pinout
Pin
No. Function
RS485+
1
Passes the positive leg of the
Description
Pin
No. Function
RS485−
14
RS-485 interface from the AZI
PCBA to TB21 (
485 +) (I/O)
2 Not used 15 Not used
3 Not used 16 Not used
4 Not used 17 Not used
5
AMP1_L1
Passes one leg of audio input
18
AMP1_L2
for central amplifier 1 from the
AZI PCBA to TB2 (
AMP1 L1)
(input)
6
AMP2_L1
Passes one leg of audio input
19
AMP2_L2
for central amplifier 2 from the
AZI PCBA to TB5 (
AMP2 L1)
(input)
7
AMP3_L1
Passes one leg of audio input
20
AMP3_L2
for central amplifier 3 from the
AZI PCBA to TB8 (
AMP3 L1)
(input)
Description
Passes the negative leg of the
RS-485 interface from the
AZI PCBA to TB21 (
485 −)
(I/O)
Passes the other leg of audio
input for central amplifier 1
from the AZI PCBA to TB2
AMP1 L2) (input)
(
Passes the other leg of audio
input for central amplifier 2
from the AZI PCBA to TB5
(AMP2 L2) (input)
Passes the other leg of audio
input for central amplifier 3
from the AZI PCBA to TB8
AMP3 L2) (input)
(
8
9
10
AMP4_L1
AMP5_L1
AMP6_L1
Passes one leg of audio input
for central amplifier 4 from the
AZI PCBA to TB11 (
AMP4 L1)
(input)
Passes one leg of audio input
for central amplifier 5 from the
AZI PCBA to TB14 (
AMP5 L1)
(input)
Passes one leg of audio input
for central amplifier 6 from the
AZI PCBA to TB17 (
AMP6 L1)
(input)
21
22
23
AMP4_L2
AMP5_L2
AMP6_L2
Passes the other leg of audio
input for central amplifier 4
from the AZI PCBA to TB11
(AMP4 L2) (input)
Passes the other leg of audio
input for central amplifier 5
from the AZI PCBA to TB14
AMP5 L2) (input)
(
Passes the other leg of audio
input for central amplifier 6
from the AZI PCBA to TB17
AMP6 L2) (input)
(
11 not used 24 not used
12 not used 25 not used
13
EGND
Passes earth ground to the AZI
PCBA (output)
NOTE: Connector J1 of the ADM is connected to the AZI PCBA via a DB25 cable assembly. This
cable assembly is not included with the ADM and must be purchased separately.
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