GE Interlogix 350A User manual
GENERAL
Units in this series are designed
specifically for use in interfacing to
remotely located speaker/mics of
intercom systems. A complete sys-
tem consists of a pair of transceivers
for connection to master and remote
intercoms. Since transceivers have
dedicated transmit and receive func-
tions, they are referred herein to as
transmitters and receivers. All func-
tions of the intercom systems to
which the links are interfaced, e.g.,
push-to-call, push-to-talk, call, and
hands-free operation, are transparent
through the interface units.
Units are available with several vari-
ables which include choices between:
• Modular or rack mounting.
• Interfacing to intercom systems
manufactured by Aiphone, Bogen,
Dukane, or Rauland.
User preferences were indicated at
the time of order and the units that
have been shipped with this instruc-
tion sheet include the features that
were specified.
ABOUT THE SYSTEM
Transmitters interface to remote
intercom units, both transmitting and
receiving audio signals. Receivers
interface to master intercom units,
both receiving and transmitting audio
signals.
The 350A2 and 350A2L models
operate over two fibers; the 350A1
model operates over a single fiber.
Modular (can) units may be used
as standalone units, placed in any
location that is convenient to the
remote or master intercom unit with
which they interface. Rack-mounted
units may be installed in a card cage
for use in any standard 19-inch rack,
each unit occupying one rack slot.
Modular units are powered by 12
VAC @ 20~25 mA, +14~16 VDC @
500 mA, or 120 VAC when using the
611P AC adapter (available from
Fiber Options). Rack units are pow-
ered simply by plugging them into the
card cage.
ADJUSTMENT POTENTIOMETERS
Adjustment potentiometers are pro-
vided on both transmitters and
receivers. These potentiometers per-
mit user adjustment of audio to meet
individual requirements
Transmitters include the following
adjustment pots:
Rack or Can* Function
R17 Automatic gain
control circuitry
(factory set)
R40 VOX
R42 SPKR VOL.
R52 NOISE FLOOR (or
mike sensitivity).
*NOTE: Can adjustment pots are
internal.
Receivers include:
Rack Can* Function
R25 R21 Audio INPUT
LEVEL
R26 R23 Audio OUTPUT
LEVEL
*NOTE: Can adjustment pots are
internal.
POT ALIGNMENT—FOUR STEPS
ONE: While speaking into the
master intercom mike, adjust the
receiver pot (on front bezel of rack
receIver unit, labelled INPUT
LEVEL) until an optimum audio-input
level has been achieved. While
adjusting, observe the audio-level
indicator LED which should illumi-
nate green in response to normal
speech. Refer to the paragraph
opposite for a description of indica-
tor LED functions.
TWO: Adjust the transmitter pot
(on front bezel of racked transmitter
unit, labelled SPKR VOL) until the
desired volume from the remote-
intercom speaker has been
achieved. Adjust the transmitter pot
(labelled VOX) to obtain the best
balance (compromise) between
amount of speech being cut out and
the speed with which it is possible to
return to LISTEN mode at the
remote location.
THREE: While speaking into the
remote intercom speaker, adjust
transmitter pot (labelled NOISE
FLOOR) until an optimum audio-input
level has been achieved. As before,
while adjusting, observe the audio-
level indicator LED.
FOUR: Adjust receiver pot (labelled
OUTPUT LEVEL) till the desired
audio-output level from the master
intercom has been achieved.
CAUTION: Do not adjust R17. It is
shown for location purposes only. It
has been factory set for the optimum
AGC function, and has no function
when adjusting audio levels.
THE OPTICAL INDICATORS
All units, modular or rack, have
have audio-level status and Level/
Loss indicators.
Audio-level status LEDs glow in
varying intensities of green as long
80 Orville Drive, Suite 102, Bohemia, New York 11716-2533 USA •631-567-8320 or 1-800-342-3748 • FAX 631-567-8322
Unit 7, Cliffe Park, Bruntcliffe Road, Morley, Leeds, West Yorkshire, LS27 0LQ, UK • 44-113-238-1668 • FAX 44-113-253-8121
GE Interlogix
Fiber Options
MODEL
350A
INTERCOM
INTERFACE
INSTRUCTION
MANUAL
Page 2
PIN CONNECTIONS / MODULAR UNITS
One- or Two-Fiber Units. Transmitters (left) 350A1-T, 350A2-T, or 350A2L-T, and Receivers (right) 350A1-R, 350A2-R, or 350A2L-R.
NOTE: Drawing shows three FIBER connections. Two-fiber units (350A2 or 350A2L) have only two such connections, the top and bottom. One-fiber
units (350A1) have only one such connection shown in the center.
TABLE TWO: J1 PIN CONNECTIONS
MODULAR TRANSMITTER UNITS
Pins Function
5 & 6 Call Button
3 & 4 Speaker/Mike External
2 AC/DC Input
1 Power Ground
TABLE THREE: J1 PIN CONNECTIONS
MODULAR RECEIVER UNITS
Pins Function
9 & 10 Not Used
7 & 8 Master Interface
5 & 6 Call Switch Out
4 Not Used
3 Audio Ground
2 AC/DC Input
1 Power Ground
Page 3
PIN CONNECTIONS / RACK UNITS
One- or Two-Fiber Units. Transmitters (above) 350A1-T-R, 350A2-T-R, or 350A2L-T-R, and Receivers (right) 350A1-R-R, 350A2-R-R, or
350A2L-R-R.
NOTE: Transmitter and receiver drawings (below) show two FIBER connections as found in Two-fiber units. One-fiber units will have only one
FIBER connection.
TABLE FOUR: J1 PIN CONNECTIONS
RACKMOUNT TRANSMITTER UNITS
Pins Function
5 & 6 Call Button
3 & 4 Speaker/Mike External
1 & 2 Relay Output
TABLE FIVE: J1 PIN CONNECTIONS
RACKMOUNT RECEIVER UNITS
Pins Function
5 & 6 Relay Output
4 Reverse Contact Closure
3 Ground
1,2 Master Interface
80 Orville Drive, Suite 102, Bohemia, New York 11716-2533 USA •631-567-8320 or 1-800-342-3748 • FAX 631-567-8322
Unit 7, Cliffe Park, Bruntcliffe Road, Morley, Leeds, West Yorkshire, LS27 0LQ, UK • 44-113-238-1668 • FAX 44-113-253-8121
All specifications are subject to change without notice. Information furnished by FIBER OPTIONS is believed to be accurate and
reliable. However, no responsibility or liability is assumed by FIBER OPTIONS for its use, nor for any infringement of patents or
other rights of third parties which may result from its use. No license is granted by implication or otherwise under any patent or
other rights of FIBER OPTIONS.
Copyright 2002 by FIBER OPTIONS. All Rights Reserved. Rev 020723
Fiber Options...Light Years Ahead
Doc. No. 11-0350A-A
as audio levels are within the input
or output range of the module. They
are unlit if there is no audio coming
in, and they will glow red if the audio
reaches clipping. While occasional
red peaks are normal, a steady red
indicates a potential overload condi-
tion.
The Level/Loss™ LEDs are used
to indicate received optical power.
They will glow green if light is being
received; they dim as attenuation
increases. If the link is not receiving
enough light or if the fiber is discon-
nected, they will glow red.
IN CASE OF PROBLEMS
The AGC circuitry employed within
the system eliminates the need for
field tuning. Nor is periodic mainte-
nance or routine calibration required.
In the event of module failure, verify
that power is properly connected to
the modules. Also verify that the
fiber is good. The Level/ Loss indica-
tor on the receiver is helpful in this
situation.
