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Active Control Outputs
The MR88 has 8 open-collector outputs, one per microphone channel. These
can be used for external control for activating cameras, lights etc. upon
detecting speech. The open-collector outputs can sink 500mA each with a
maximum collector voltage of +50V DC. This allows a variety of external
devices to be driven from the mixer.
For extra flexibility the MR88 can be set so that these outputs are either
HIGH or LOW when the channel is active.
Examples
1. Externally powered lamps can be wired as follows:-
Control Out 1
1
Control Out 2
14
Control Out 3
2
Control Out 4
15
Control Out 5
3
Control Out 6
16
Control Out 7
4
Control Out 8
17
Control In 8
5
Control In 7
18
Control In 6
6
Control In 5
19
Control In 4
7
Control In 3
20
Control In 2
8
Control In 1
21
Gnd
9
Gnd
22
+5V
10
VCA1 T op
23
VCA1 Wiper
11
VCA1 Gnd
24
VCA2 T op
12
VCA2 Wiper
25
VCA2 Gnd
13
Control Port
Lamp
+
-
+0 - 50V
Max 500mA
PSU
2. High efficiency LED’s can be powered from the auxiliary 5V (pin 10) on the
control port. The maximum current allowed from this pin is 100mA.
Control Out 1
1
Control Out 2
14
Control Out 3
2
Control Out 4
15
Control Out 5
3
Control Out 6
16
Control Out 7
4
Control Out 8
17
Control In 8
5
Control In 7
18
Control In 6
6
Control In 5
19
Control In 4
7
Control In 3
20
Control In 2
8
Control In 1
21
Gnd
9
Gnd
22
+5V
10
VCA1 T op
23
VCA1 Wiper
11
VCA1 Gnd
24
VCA2 T op
12
VCA2 Wiper
25
VCA2 Gnd
13
Control Port
LED
LED
LED
LED
LED
LED
LED
LED
R1
470R
R2
470R
R3
470R
R4
470R
R5
470R
R6
470R
R7
470R
R8
470R