Pub. 42004-406A
GAI-TRONICS® CORPORATION
A HUB BEL L C OMP ANY
Model 12594-001
Redundant AZI Switching Module
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
The Model 12594-001 Redundant AZI Switching Module is designed to provide connection for a primary
and a secondary AZI card when redundant circuits are required in GAI-Tronics ADVANCE cabinets or
other audio switching applications. The module controls audio line switching from the AZI cards to
amplifier inputs. Each module is capable of switching six audio lines. The switching action is controlled
by an external contact closure.
Figure 1. Model 12594-001 Redundant AZI Switching Module
GAI-Tronics Corporation P.O. Box 1060, Reading, PA 19607-1060 USA
610-777-1374 „ 800-492-1212 „ Fax: 610-796-5954
VISIT WWW .GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Model 12594-001 Redundant AZI Switching Module
Pub. 42004-406A
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Installation
CAUTION
When installing or replacing this module, be sure power is not applied to
avoid damage to the module circuits.
The Model 12594-001 Redundant AZI Switching Module is designed for mounting in 4-inch Snap Trak®.
When inserting the module in SnapTrak®, exercise care when pressing on the module edges to avoid
damage to the module’s printed circuit board and components.
Once installed in the SnapTrak®, be sure the module edges are secured in the channels so that the module
does not dislodge during transport or operation if subjected to vibration. Also, if this module is used with
other modules in the SnapTrak®, be sure to leave spacing between modules to facilitate wiring at any
edge-mounted terminal blocks.
Terminations
The following is a description of the available terminations:
J1 – is the primary AZI card connection; a cable with a 25-pin “D-Sub” connector is required.
J2 – is the secondary AZI card connection; a cable with a 25-pin “D-Sub” connector is required.
JTB1 – is the 12 V dc power input to the module.
JTB2 – is a feed-through 12 V dc power output to other modules.
JTB3 – is the secondary RS-485 data connection.
JTB4 – is for the six switched, audio outputs.
JTB5 – is the primary RS-485 data connection.
JTB6 – are the control inputs to the module to activate the relays to switch between primary and
secondary AZI cards when a fault occurs. Activation at either input requires dc (-) control.
JTB7 – is the Form “C” dry contact output, which can be used to activate other devices or for remote
status indication. The maximum switching capacity for the contact set is 30 V dc @ 1 amp.
JTB8 – is an auxiliary audio output connection from the AMP-6 output of the primary AZI card that can
be used to supply audio signals to other devices, if needed.
JTB9 – is an auxiliary audio output connection from the AMP-6 output of the secondary AZI card that
can be used to supply audio signals to other devices, if needed.
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Model 12594-001 Redundant AZI Switching Module
The following is a summary of each connector and terminal block function(s):
J1 – Primary AZI Card (25-pin D-Sub)
J2 – Secondary AZI Card (25-pin D-Sub)
Pin No.
Pin No.
Function
Function
1 & 14
RS-485 Data
1 & 14
RS-485 Data
5 & 18
Audio line #1
5 & 18
Audio line #1
6 & 19
Audio line #2
6 & 19
Audio line #2
7 & 20
Audio line #2
7 & 20
Audio line #2
8 & 21
Audio line #4
8 & 21
Audio line #4
9 & 22
Audio line #5
9 & 22
Audio line #5
10 & 23
Audio line #6
10 & 23
Audio line #6
2-4, 11-13, 15-17,
24-25
Spare – No connection
2-4, 11-13, 15-17,
24-25
Spare – No connection
JTB1 – 12 V dc Power Input
JTB2 - 12 V dc Power Output
Terminal No.
Terminal No.
Function
Function
1
12 V (+)
1
12 V (+)
2
12 V (-)
2
12 V (-)
3
GND
JTB3 – Secondary RS-485 data line
JTB5 - Primary RS-485 data line
Terminal No.
Terminal No.
Function
Function
1
Data (-)
1
Data (+)
2
Data (+)
2
Data (-)
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Model 12594-001 Redundant AZI Switching Module
JTB4 – Audio Outputs
JTB6 – Switching Control Inputs
Terminal No.
Function
Terminal No.
Function
1&2
Audio Line #6
1
Primary Control Line
3&4
Audio Line #5
2
Secondary Control Line
5&6
Audio Line #4
7&8
Audio Line #3
9 & 10
Audio Line #2
11 & 12
Audio Line #1
JTB7 – Relay Contact Output
Terminal No.
Function
1
Normally Open
2
Common
3
Normally Closed
JTB8 – Primary Audio Output #6
JTB9 – Secondary Audio Output #6
Terminal No.
Terminal No.
Function
Function
1
Audio (+)
1
Audio (-)
2
Audio (-)
2
Audio (+)
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Operation
The module has essentially two modes of operation, normal and fault. Each mode is described in detail
below.
Data line terminals JBT3 and JBT5 are not affected by the module’s switching action. They are simply
pass-through terminals for the RS-485 data lines from the AZI card connectors. JTB3 connects to the
Secondary AZI card (J2) and JTB5 connects to the Primary AZI card (J1).
Audio line terminals JBT8 and JBT9 are not affected by the boards switching action. They are simply
pass-through terminals for the audio line #6 from the AZI card connectors. JTB8 connects to the Primary
AZI card (J1) and JTB9 connects to the Secondary AZI card (J2).
Normal Condition
All relays on this module are de-energized. The Primary AZI card’s audio (J1) is connected to audio
output terminals (JTB4). The Secondary AZI card’s audio (J2) is disconnected from the audio output
terminals (JTB4).
Fault Condition
A fault condition is signaled by connecting either terminal of JBT6 to 12 V dc (-). LED1 (Pri-Active) or
LED2 (Sec-Active) illuminates to indicate the active input. In an ADVANCE system application, these
inputs are active if a primary MCU or primary AMI fault occurs. The control signal input is supplied by
an external relay contact.
When activated, relays K1–K7 are energized. Relay K1 contacts are wired to JBT7 and will change state
for the duration of the active condition. Relays K2–K7 switch the Secondary AZI card’s audio (J2) to the
audio output terminals (JTB4). The Primary AZI card’s audio (J1) is disconnected from the audio output
terminals (JTB4).
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Maintenance
If the module requires service, contact your Regional Service Center for a return authorization number
(RA#). The module should be shipped prepaid to GAI-Tronics with a return authorization number and a
purchase order number. If the module is under warranty, repairs or a replacement will be made in
accordance with GAI-Tronics’ warranty policy. Please include a written explanation of all defects to
assist our technicians in their troubleshooting efforts.
Call 800-492-1212 inside the USA or 610-777-1374 outside the USA for help identifying the Regional
Service Center closest to you.
Troubleshooting
Problem
Solution
No audio from output terminals
•
•
•
Verify ribbon cables at J1 and J2 on the module are properly
connected to AZI cards at designated card racks.
Verify amplifiers are connected to the correct outputs along
with proper polarity at JTB4.
Verify primary and secondary MCU cards contain correct
software configurations to output audio at designated AZI
amplifier outputs.
Module LEDs do not illuminate
and relays do not switch when
input control is provided.
•
•
Module still does not function after
all checks described in this section.
Contact GAI-Tronics service for repair or replacement of the
module in accordance with the information provided on this page.
Verify 12 V dc power is applied to the module.
Verify 12 V dc (-) is being switched to the PRI and/or SEC
inputs at JTB6.
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Specifications
Electrical
Power requirements ................................................................. 10–14 V dc (12 V dc @ 91.5 mA nominal)
Number of control inputs........................................................................................................................ 2
Number of fault outputs.......................................................................................................................... 1
Fault output type ..................................................................................................... Form “C” dry contact
Fault output contact rating ................................................................................. 1 A maximum @ 30 V dc
Connections
25-Pin “D-Sub” ...................................................................................................................................... 2
Modular (plug-in) terminal blocks .......................................................................................................... 9
Minimum terminal block conductor size ............................................................... No. 28 AWG (0.5 mm2)
Maximum terminal block conductor size .............................................................. No. 12 AWG (3.0 mm2)
Mechanical
Module dimensions ...................................... 7.50 L × 4.00 W × 1.44 H inches (190.5 × 101.6 × 36.6 mm)
Module weight ............................................................................................................. 0.38 lbs. (0.17 kg)
Environmental
Temperature range (operating/storage).....................................................-4° F to 158° F (-20° C to 70° C)
Humidity....................................................................................... 85% non-condensing relative humidity
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