AV-452
Serial Control Specification
7733 Telegraph Road • Montebello, CA 90640 • (323) 726-0303 • http://www.tascamcontractor.com
All features and specifications are subject to change without notice. Contact your local TASCAM representative for the latest information.
Page 1 of 8
AV-452_RS-232_spec.pdf
031104
• Channel Mute or Dim Command & Status
• Complete AV Routing Command & Status
• Amp A and B In/Out Command & Status
• Intercom and Cascade Command & Status
• Room Volume Up/Down Commands
• "Query All Status" Macro Command
• Dip Switch Setting and EMG Circuit Status
• Uses RS-232, RS-422, or RS-485 Protocol
• Assignable Address for RS-485
• Generates Status Commands on State Changes
• Command to Program Outbound IR Strings
(For this feature, see AV-452_IR_PRG.pdf)
SERIAL IMPLEMENTATION OVERVIEW
SERIAL ROTARY DIAL SETTING AND CABLE PIN-OUT
TASCAM's AV-452 has a serial port capable of
operating in standard RS-232, RS-422 or RS-485
protocols which offers access to most switches and
indicator status on the AV-452. The AV-452 saves
resources on recursive scanning with a "query all"
command and by generating status replies on status
changes. An additional RS-232 command allows IR
strings to be learned for projector control, outlined
separately in: AV-452_IR_PRG.pdf.
Settings and Voltages
Note: The rotary control and most dip switches are only
scanned at power-up. You will need to turn the AV-452 off
and back on for any changes to take effect.
Under the security panel, there is a rotary dial that
determines the machine ID (address). This allows multiple
AV-452 machines to be connected to a single serial line and
still be addressed individually. If you are not using multiple
machines, this should probably be set to "1".
The RS-422 and RS-485 operation follows normal
specifications. However, RS-232 operation is a modification
of the RS-422 port. It operates at 0-4.5V, rather than
±
9V.
This will operate normally with most equipment, such as old
control systems or PC computers. If you have trouble with
RS-232, try switching to RS-422 if you can to see if that
solves the problem.
Cable Pin-Out, and Control System Settings
Connector shown from perspective of the rear panel female
connector. The male connector for your cable will be the
mirror image of this diagram.
Connector:
Port Speed:
Command Spacing:
Character Length:
Parity:
Female DB9
9600 bps
>25msec
8 bit
None
1
2
3
4
5
6
7
8
9
GND
Rx-
Tx-
Pin 2:
Pin 3:
Pin 5:
Rx-Data
Tx- Data
Ground
RS-232:
GND
Rx-
Tx-
Rx+
Tx+
Pin 2:
Pin 3:
Pin 5:
Pin 6:
Pin 7:
Rx-Data
Tx- Data
Ground
Rx+ Data
Tx+ Data
RS-422:
GND
TxRx-
TxRx+
Pin 2:
Pin 3:
Pin 5:
Pin 6:
Pin 7:
TxRx-Data
TxRx-Data
Ground
TxRx+ Data
TxRx+ Data
RS-485:
REAR PANEL MACHINE ID
ROTARY ENCODER
100W/ch @ 8
Ω
160W/ch @ 4
Ω
SW FUNCTION
FUNCTION
UP
DN
EXC
LEARN IR
CASCADE
SPK OUT
1
2
3
4
5
6
MIC HPF
INT GATE
AV DUCK
AV DUCKER
LINE
OUTPUT
MIC GRP
INSERT
LINE OUTPUT
MEETING
DVD
VCR
CD-RW
CASSETTE
RS-232
RELAY
CONTROL
PHANTOM
POWER
MIC4
MIC3
MIC2
MIC1
GND
-
+
GND
-
+
GND
-
+
GND
MIC1
MIC2
MIC3
MIC4
-
+
OFF ON
ST MONO
LEVEL
INTERCOM
(-)
12V
EMG IN GND
24V
70V
RATIO
THRESH
GATE
THRESH
SPEAKER
OUTPUT
IN
POWER
RGB2 THRU
IN
VCR
MONITOR
OUT
CASCADE INPUT
R
L
R
R
L
L
R
L
OUT
IN
OUT
IN
OUT
IN
IN
OUT
OUT
DVD
IN
B
A
CV IN
EMG
SERIAL
ADDRESS
CUSTOMIZE
SUM
OFF
ON
OFF
ON
OFF
ON
OFF
ON
MON ST
SW
UP
DN
SERIAL
ADDRESS
0
1
2
3
4
5
6
7
8
9
