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EF1210 U
SER
M
ANUAL
26 http://www.aspi.com Copyright © 1999, All Rights Reserved
Connecting Multiple
EF1210s
Multiple EF1210s can be easily connected together to add more zones or micro-
phones to your setup. The ASPI Bus allows multiple devices to be controlled by a
single RS-232 connection. Reference signals to each EF1210 must still be wired to
each EF1210.
Connecting the
ASPI Bus
The ASPI Bus can connect multiple ASPI Digital products, such as the EF1210, to the
same RS-232 remote control device. This means only one RS-232 connection is
needed to control all devices on the ASPI Bus. Each device on the ASPI Bus should
have a different Device ID or Type ID, so that each device can be addressed and con-
trolled individually. Note that each different type of ASPI Digital product (e.g.
EF200, EF1210) has a distinct Device Type. This means, for example, that an EF200
may have the same Device ID as an EF1210 without causing a conflict. These steps
should be followed to connect the ASPI Bus:
1. Connect the RS-232 remote control device to the first ASPI Digital product in the
chain.
2. Connect an ASPI Bus cable between the A
SPI
B
US
O
UT
of the first device, and
the A
SPI
B
US
I
N
of the second device.
3. Connect an ASPI Bus cable between the A
SPI
B
US
O
UT
of the second device, and
the A
SPI
B
US
I
N
of the third device, and so on.
Figure 9. Connecting multiple EF1210s
. . .
POWER
Automatic
Microphone
Mixer
. . .
POWER
Automatic
Microphone
Mixer
. . .
POWER
Automatic
Microphone
Mixer
ON
ON
ON
REMOTE CONTROLREMOTE CONTROL
ASPI BUS IN
ASPI BUS OUT
RS-232
L
INE
L
INE
L
INE
L
INE
L
INE
MIC/LINE INPUTS
ZONE
A
5, 15 VDC 5, 12 VDC
M
IC
1
P
HANTOM
1
M
IC
2
P
HANTOM
2
D
EVICE
ID 8
D
EVICE
ID 4
D
EVICE
ID 2
D
EVICE
ID 1
21
D
EVICE
ID 16
M
IC
3
P
HANTOM
3
M
IC
4
P
HANTOM
4
M
IC
5-8
P
HANTOM
5
P
HANTOM
6
P
HANTOM
7
P
HANTOM
8
436587 PLAY
AMIX
IN
AEC BAEC A 21436587 REC
TO
CODEC
AEC REF
R
ESERVED
R
ESERVED
LINE OUTPUTS
ZONE
B
PIN 2: TX
3: RX
REMOTE CONTROLREMOTE CONTROL
ASPI BUS IN
ASPI BUS OUT
RS-232
L
INE
L
INE
L
INE
L
INE
L
INE
MIC/LINE INPUTS
ZONE
A
5, 15 VDC 5, 12 VDC
M
IC
1
P
HANTOM
1
M
IC
2
P
HANTOM
2
D
EVICE
ID 8
D
EVICE
ID 4
D
EVICE
ID 2
D
EVICE
ID 1
21
D
EVICE
ID 16
M
IC
3
P
HANTOM
3
M
IC
4
P
HANTOM
4
M
IC
5-8
P
HANTOM
5
P
HANTOM
6
P
HANTOM
7
P
HANTOM
8
436587 PLAY
AMIX
IN
AEC BAEC A 21436587 REC
TO
CODEC
AEC REF
R
ESERVED
R
ESERVED
LINE OUTPUTS
ZONE
B
PIN 2: TX
3: RX
REMOTE CONTROLREMOTE CONTROL
ASPI BUS IN
ASPI BUS OUT
RS-232
L
INE
L
INE
L
INE
L
INE
L
INE
MIC/LINE INPUTS
ZONE
A
5, 15 VDC 5, 12 VDC
M
IC
1
P
HANTOM
1
M
IC
2
P
HANTOM
2
D
EVICE
ID 8
D
EVICE
ID 4
D
EVICE
ID 2
D
EVICE
ID 1
21
D
EVICE
ID 16
M
IC
3
P
HANTOM
3
M
IC
4
P
HANTOM
4
M
IC
5-8
P
HANTOM
5
P
HANTOM
6
P
HANTOM
7
P
HANTOM
8
436587 PLAY
AMIX
IN
AEC BAEC A 21436587 REC
TO
CODEC
AEC REF
R
ESERVED
R
ESERVED
LINE OUTPUTS
ZONE
B
PIN 2: TX
3: RX
8 Line Level Signals
8 Line Level Signals
8 Line Level Signals
Device ID 0
Device ID 1
Device ID 2
15
15
15
AUX
IN
AUX
IN
AUX
IN
PIN 2: TXD
3: RXD
PIN 2: TXD
3: RXD
PIN 2: TXD
3: RXD
Note.
The Device ID of each EF1210 should be different from other
EF1210s connected together.
28


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