Pub. 42004-677L2C
GAI-TRONICS® CORPORATION
A HUBBELL COMPANY
69439-001
External Audio Interface
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.
General Information
The Model 69439-001 External Audio Interface (EAI) allows multiple audio paths to be interfaced to a
SmartSeries system. It is installed in a 10457 Series Card Rack and is controlled by a 69440 Master
Control Unit (MCU) installed in that same card rack. The EAI is designed exclusively for use in a
SmartSeries system, and is not intended for use with other types of equipment.
Description of Major Components
The EAI Front Panel LEDs
The following table describes the EAI front panel LEDs and their functions:
LED Status Description
ON LINE
PRI ACT
SEC ACT
On The MCU is communicating properly with the EAI, and the MCU is
configured to recognize the EAI.
Flashing
Off EAI is not receiving power from the card rack or
On The Audio Messenger Interface (AMI) acting as the primary audio generator is
Off The “On” condition is not occurring.
On The AMI acting as the secondary audio generator is active.
Off The “On” condition is not occurring.
The MCU is not communicating properly with the EAI.
OTE: The flashing rate is approximately 1 Hz.
N
configured to recognize the EAI.
active (playing a message for a purpose other than supervision).
the MCU is not properly
GAI-Tronics Corporation 400 E. Wyomissing Ave. Mohnton, PA 19540 USA
610-777-1374 800-492-1212 Fax: 610-796-5954
V
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LED Status Description
PRI FLT
On MCU detects at least one fault in either the AMI acting as the primary audio
generator, or in that AMI’s associated audio paths.
Off The “On” condition is not occurring.
SEC FLT
On MCU detects at least one fault in either the AMI acting as the secondary audio
generator, or in that AMI’s associated cabling.
Off The “On” condition is not occurring.
AUD IN #1,
IN #2,
AUD
AUD
IN #3,
or,
AUD
IN #4
On The EAI detects a signal on the associated 600-ohm audio input.
OTE: The LED labeled AUD IN #1 is associated with 600-ohm audio input
N
1; the LED labeled AUD
IN #2 is associated with 600-ohm audio input 2, etc.
Off The “On” condition is not occurring.
Connections to the Field Wiring Termin al Blocks
Connections to the EAI card are typically accessed via two 26-pin terminal block modules mounted inside
the system’s control cabinet. A ribbon cable connects each terminal block module to the rear of the card
rack housing the EAI card. The actual location of the terminals is shown on the control cabinet outline
and connection drawings. Figure 1 illustrates the terminal block assignments.
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Figure 1.
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Audio Inputs
The 600-ohm audio input 1, 600-ohm audio input 2, 600-ohm audio input 3, and 600-ohm audio input 4
provide four audio inputs to the system. These inputs may be independently routed to one of the
following five card rack audio busses: evacuation, page resource 1, page resource 2, party line 1, or party
line 2. The EAI is not able to mix audio sources, therefore only one audio input may be connected to a
particular card rack audio bus at a time. The EAI constantly checks for the presence of a signal on these
inputs and updates the state of its corresponding status LED mounted on the front panel.
Figure 2. Typical audio input connection
Audio Outputs
The 600-ohm audio output 1 and 600-ohm audio output 2 provide two audio outputs from the system.
These outputs may be independently routed from one of the following four card rack audio busses: page
resource 1, page resource 2, party line 1, or party line 2. The EAI is not able to mix audio sources,
therefore only one card rack audio bus may be connected to a particular audio output at a time. Each
audio output requires an external 600-ohm load resistor for proper operation.
Figure 3. Typical audio output connection
OTE 1: The audio output “shield” terminal is coupled to ground by an internal capacitor on the EAI
N
card. This is done to suppress any high frequency noise, which may be induced on the cable. Do not add
any external capacitors when terminating the cable shield.
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Contact Inputs
The contact closure input 1, contact closure input 2, contact closure input 3, and contact closure input 4
provide four supervised contact closure inputs to the system. Each input is activated by a switch closure.
The switch wiring is monitored for open or short circuit faults. A resistor network must be installed at the
switch to enable the cable monitoring. These inputs are typically used in conjunction with an audio input
and are used to assign a broadcast destination and a paging priority to the audio source. Actual wiring of
the input circuits is detailed on the connection diagram of the system control cabinet.
Figure 4. Typical contact input connection
Contact Outputs
The contact closure output 1, contact closure output 2, contact closure output 3, and contact closure
output 4 provide four voltage-free, solid-state contact closure outputs from the system. Each output can
switch a maximum load current of 50 mA. The output activation is controlled by the system MCU. The
activation times are defined by the system’s software programming. Actual wiring and operation of the
output circuits is detailed on the connection diagram and operating manuals of the system control cabinet.
NOTE: If the EAI’s ON LINE LED is flashing, then all contact outputs will be open.
Figure 5. Typical contact output connection
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Switch and Jumper Settings
Several switch and jumper setting are required for proper operation of the EAI Card. The following
settings are set during the system commissioning and programming and should not be changed. If
replacing an existing EAI card for maintenance purposes, be sure to duplicate the switch and jumper
settings of the card being replaced. Refer to Figure 6 for switch and jumper locations.
The 2xx/3xx Address (P1) shorting clip selects part of the base input/output port address used by the MCU
when accessing the EAI.
The Board Address (S3) rotary switch selects part of the base input/output port address used by the MCU
when accessing the EAI.
The Board Identif ication (S4) rotary switch lets the MCU distinguish between multiple EAIs installed in
the same card rack.
The Test Enable (S1) rotary switch is used during production testing of the board. Set this rotary switch
to “0” during normal operation.
The Register Address (S2) rotary switch is used during production testing of the board. Set this rotary
switch to “0” during normal operation.
Internal Features
The EAI contains a 1.00 kHz sine wave detector for use in the supervision of several internal audio paths.
The EAI contains two 2-wire to 4-wire convers ion circ uit s for accessing the party line 1 and party line 2
card rack audio busses. Each of those two card rack busses has a dedicated circuit.
Operation
After installation, the Model 69439-001 External Audio Interface (EAI) should start automatically. The
EAI requires no direct user intervention during normal operations. See your system manual for more
information on how the EAI operates in your customized system.
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Figure 6. Model 69439-001 External Audio Interface
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Installation and Maintenance
Direct questions about installation of this product to the GAI-Tronics Field Service Department at
800-492-1212 inside the USA or 610-777-1374 outside the USA.
Installation Guidelines
WARNING
Disconnect power to the card rack before performing any maintenance.
Installation Instructions
1. Remove the EAI from its protective carton.
2. Verify that power is disconnected to the card rack prior to installation.
3. Verify that the five board switch and jumper settings described in the Switch and Jumper Settings
section on page 5 are set in accordance with the instructions in your system manual.
4. Align the EAI into the upper and lower tracks for the card rack slot.
5. Slide the EAI toward the rear of the card rack until it comes in contact with the connector on the
backplane.
6. Firmly press on the front bezel until the EAI is seated in the backplane connector, and tighten the two
screws located on the front bezel to secure it to the card rack.
Removing the EAI Card from Card Rack
1. Remove power from the card rack.
2. Remove the two screws on the front bezel that secures the EAI to the card rack.
3. Gently disengage the EAI from the connector on the backplane and slide the EAI out of the card rack.
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Frequently Asked Questions
Q: When the card rack is powered, but the MCU is either not installed or not properly configured, is
there some feature of the EAI that can aid in determining if a connection to one of the audio inputs is
properly wired?
A: Yes. The bottom four LEDs, labeled AUD
IN #1, AUD IN #2, AUD IN #3, and AUD IN #4, are
controlled by the EAI independently of the MCU. Each LED shows the detected audio status of the
600-ohm audio input corresponding to the LED’s label. After injecting a signal on a wire in question, one
can use the associated LED to tell if the wire is connected.
Q: Is there a common reason why one of the bottom four LEDs, labeled AUD
IN #1, AUD IN #2, AUD
IN #3, and AUD IN #4, may never turn off?
A: Yes. The 600-ohm audio input corresponding to the LED might be detecting excessive noise. One
common cause of this excessive noise is a ground problem.
Q: Why are the levels on the audio outputs 6 dB higher than specified?
A: A 600-ohm resistor is not connected across the audio output.
Q: Must the resistor network be installed when using the contact input terminals?
A: Yes; if not, the system will report a fault condition.
Specification s
Electrical
Board
Power ................................................................................................ 575 mA maximum @ +5 V dc ±10%
150 mA maximum @ +12 V dc ±10%
150 mA maximum @ −12 V dc ±10%
1.0 kHz Sine Wave Detectors
NOTE: Use a card rack audio bus when measuring amplitude.
In-range frequency........................................................................................ (within) inside 1.00 kHz ±1%
In-range amplitude on card rack audio bus......................................inside 4.24 Vp-p (1.50 Vrms) ±1.5 dB
Out-of-range frequency............................................................................. (beyond) outside 1.00 kHz ±3%
Out-of-range amplitude on card rack audio bus.............................outside 4.24 Vp-p (1.50 Vrms) ±4.5 dB
600-Ohm Audio Input
Audio input voltage.................................................................................2.82 Vp-p (1.00 Vrms) maximum
Audio input to card rack audio path frequency response................................ 250 Hz to 12.0 kHz ±1.5 dB
Audio input to card rack audio path distortion + noise............................ THD + noise <0.5% @ 1.00 kHz
Audio input impedance........................................................................... ≥24 kΩ from 250 Hz to 12.0 kHz
Audio detect level for LED.................................................................282 mVp-p (100 mVrms) maximum
Audio not detected threshold for LED..............................................28.2 mVp-p
(10.0 mVrms) minimum
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600-Ohm Audio Output
NOTE: Each audio output requires an external 600 Ω load resistor for proper operation.
Audio output voltage..................................................................................2.82 Vp-p (1.00 Vrms) ±1.5 dB
Card rack audio path to audio output frequency response.............................. 250 Hz to 12.0 kHz ±1.5 dB
Card rack audio path to audio output distortion + noise.......................... THD + noise <0.5% @ 1.00 kHz
Audio output impedance...................................................................................................... 600 Ω nominal
Contact Closure Output
Open resistance..............................................................................................................................≥1.0 MΩ
Closed resistance................................................................................................................................ ≤50 Ω
Load voltage................................................................................................. 350 Vp (245 Vrms) maximum
Load current............................................................................................ 71 mAp (50.0 mArms) maximum
Contact Closure Input
Open resistance........................................................................................................................ 20 kΩ ±10%
Closed resistance.....................................................................................................................5.0 kΩ ±10%
Environmental
Temperature range (operating/storage)................................................ +32° F to +122° F (0° C to +50° C)
Relative humidity:.................................................................................................10–85% non-condensing
Mechanical
Unit dimensions ...............................................10.3 H × 0.780 W × 9.07 D inches (262 × 19.9 × 231 mm)
Unit weight.................................................................................................... 0.892 lbs. nominal (0.405 kg)
Approval
CE Mark
Replacement Parts
The EAI has no field replaceable components.
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Warranty
Equipment. GAI-Tronics warrants for a period of one (1) year from the date of shipment, that any
GAI-Tronics equipment supplied hereunder shall be free of defects in material and workmanship, shall
comply with the then-current product specifications and product literature, and if applicable, shall be fit
for the purpose specified in the agreed-upon quotation or proposal document. If (a) Seller’s goods prove
to be defective in workmanship and/or material under normal and proper usage, or unfit for the purpose
specified and agreed upon, and (b) Buyer’s claim is made within the warranty period set forth above,
Buyer may return such goods to GAI-Tronics’ nearest depot repair facility, freight prepaid, at which time
they will be repaired or replaced, at Seller’s option, without charge to Buyer. Repair or replacement shall
be Buyer’s sole and exclusive remedy. The warranty period on any repaired or replacement equipment
shall be the greater of the ninety (90) day repair warranty or one (1) year from the date the original
equipment was shipped. In no event shall GAI-Tronics warranty obligations with respect to equipment
exceed 100% of the total cost of the equipment supplied hereunder. Buyer may also be entitled to the
manufacturer’s warranty on any third-party goods supplied by GAI-Tronics hereunder. The applicability
of any such third-party warranty will be determined by GAI-Tronics.
Services. Any services GAI-Tronics provides hereunder, whether directly or through subcontractors,
shall be performed in accordance with the standard of care with which such services are normally
provided in the industry. If the services fail to meet the applicable industry standard, GAI-Tronics will
re-perform such services at no cost to buyer to correct said deficiency to Company's satisfaction provided
any and all issues are identified prior to the demobilization of the Contractor’s personnel from the work
site. Re-performance of services shall be Buyer’s sole and exclusive remedy, and in no event shall GAITronics warranty obligations with respect to services exceed 100% of the total cost of the services
provided hereunder.
Warranty Periods. Every claim by Buyer alleging a defect in the goods and/or services provided
hereunder shall be deemed waived unless such claim is made in writing within the applicable warranty
periods as set forth above. Provided, however, that if the defect complained of is latent and not
discoverable within the above warranty periods, every claim arising on account of such latent defect shall
be deemed waived unless it is made in writing within a reasonable time after such latent defect is or
should have been discovered by Buyer.
Limitations / Exclusions. The warranties herein shall not apply to, and GAI-Tronics shall not be
responsible for, any damage to the goods or failure of the services supplied hereunder, to the extent
caused by Buyer’s neglect, failure to follow operational and maintenance procedures provided with the
equipment, or the use of technicians not specifically authorized by GAI-Tronics to maintain or service the
equipment. THE WARRANTIES AND REMEDIES CONTAINED HEREIN ARE IN LIEU OF AND
EXCLUDE ALL OTHER WARRANTIES AND REMEDIES, WHETHER EXPRESS OR IMPLIED BY
OPERATION OF LAW OR OTHERWISE, INCLUDING ANY WARRANTIES OF
MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE.
Return Policy
If the equipment requires service, contact your Regional Service Center for a return authorization number
(RA#). Equipment should be shipped prepaid to GAI-Tronics with a return authorization number and a
purchase order number. If the equipment is under warranty, repairs or a replacement will be made in
accordance with the warranty policy set forth above. 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.
(Rev. 10/06)
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