GAI-Tronics 69439-001 User Manual
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
ISIT WWW.GAI-TRONICS.COM FOR PRODUCT LITERATURE AND MANUALS
Pub. 42004-677L2C
Model 69439-001 External Audio Interface Page: 2 of 9
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.
f:\standard ioms - current release\42004 instr. manuals\42004-677l2c.doc
11/10
Figure 1.
Pub. 42004-677L2C
Model 69439-001 External Audio Interface Page: 3 of 9
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.
f:\standard ioms - current release\42004 instr. manuals\42004-677l2c.doc
11/10
Loading...