Talk-Back Audio
Radio Systems INTERCOM Card Wiring Instructions
Table-top/Console Programming
(Program J1 thru J4)
For Assy:
INTERCOM
Rev: 11/06/2013
Jump left pins
for table-top
Jump right pins
for console
These pre-made factory
cables included with
the squawk box card
Output Board
Talk-Back Connectors
J1
Talk-Back Audio
(To J36 & J37 on
the Output Bd.)
3 +15V
2 GND
1 Squawk Ctl
J36
Squawk Box Control
(To J1 on the Output Bd.)
5
4
3 GND
2
1 TB Out
J2-2
Table Top Speaker
Drive Volume
J2-3
Remote Console
Drive Volume
VR2
Talkback Output Level
VR26
Talkback Input Level
J37
J2-1
Table Top Speaker
Receive Volume
Remote Console
Receive Volume
Console Intercom 1 +
1
Console Intercom 1 Shield
2
3
Table Top Speaker 1 Hot
Table Top Speaker 1 Switched
Console Intercom 2 +
4
5
6
Console Intercom 2 Shield
Table Top Speaker 2 Hot
Table Top Speaker 2 Switched
7
8
9
10
10
9
8
7
6
5
4
3
2
1
Install shorting
jumper for
unbalanced
patch point inputs
Table Top Speaker 4 Switched Analog Console:
From host's mic
Table Top Speaker 4 Hot
patch point
on 6 input board
Shield
Digital Console:
Console Intercom 4 From designated Utility
output
Console Intercom 4 +
Table Top Speaker 3 Switched
Table Top Speaker 3 Hot
Shield
NOTE:
Console Intercom 3 It is recommended that:
Console Intercom 3 +
Digital Console Output Board:
Analog Console Logic Board:
(connector J44 for buttons 5-8 control)
(connector J3 for buttons 5-8 control)
(connector J40 for buttons 1-4 control)
5 (Cue In)
4
3
Ground jumper
2
1
TB In +
(connector J4 for buttons 1-4 control)
Wiring
1a . Analog Console: Connect operators mic loop thru point (or other line level source) to output
board talk-back input (J37 pins 1 & 2).
OPERATOR’S MIC
(Channel 1/Input A) be wired to
this input. In an analog console
the loop-thru audio from channel
1A is utilized. In a digital console
Utility 1, programmed for
pre-fader and pre ON/OFF from
channel 1A is utilized.
When factory installed. the
above has been pre-wired.
1b. Digital Console: Connect Utility output (typically with operator’s mic prefader pre on-off assigned, or other line-level source) to output
board talkback input (J37 pins 1&2)
2. Connect provided patch cables from INTERCOM card to output board (control cable from INTERCOM card J1 to console connector J1
and the audio cable from INTERCOM card J2 to console conenctors J36 & J37).
3. Analog Console only: Install provided cables to connect J3 (talkback control) and J4 (logic board). However, a factory tech. note is
available for field modification for single unit (no logic board required) operation.
4. The INTERCOM card has 4 identical I/0 Sections. Each can host either a table-top speaker or another console that has been fitted with
an intercom card.
5. Connect speakers to terminals labeled "table-top speaker hot" and "table-top speaker switched" (1-4). Use shielded cable. Consult
interconnection diagram on next page for hook-up. Select table-top speaker on console selector buttons for hands-free mode. Table-top
speakers can "call" the console via call button.
6. Connect up to four console intercoms to terminals labeled "console intercom +" and "console intercom -". Consoles must select each
other to establish a push-to-talk pathway.
7. A maximum of four stations (any combination of table-top and console units) may be connected.
8. Note: J1 thru J4 must be programmed to select a console or table-top speaker for each channel.
Installation
Use the four plastic stand-offs provided to mount the board on the inside rear console wall near the associated connectors. Wire with supplied
harness cables. Install provided cables to connect J2 (audio in and out), J3 (talkback control) and J4 (Analog Console only; logic board).
Radio Systems, Inc.
601 Heron Drive
Logan Twp, NJ 08085
www.radiosytems.com
Rev. 9/2013
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