Yamaha ACD1 - Manual (Page 19)

ACD1 Reference Manual 19
Connector wiring
Connect GPI (General Purpose Interface) devices (e.g., control-
lers) to the rear panel [GPI] connector.
You can use GPI to send or receive control signals to or from an
external device.
The ACD1 provides 4-port input and 4-port output.
• The +V terminals have an output voltage of 5 V. A maximum total of 100 mA of current can be drawn.
• The IN terminals detect voltage changes from 0 V to 5 V.
• The OUT terminals are open-collector outputs. A maximum voltage of +12 V can be applied.
• For each port, a maximum of 75 mA of current can flow.
• Use Amp Editor to make settings such as parameter assignments.
• A Euroblock plug is used for connection to the [GPI] connector.
Euroblock connection methods are described in “Euroblock plug connection” (page 18) in this manual.
• By specifying the input/output channels in Amp Editor, you can recall scenes or edit parameters from a connected exter-
nal GPI device, or send signals to an external GPI device. For details on making settings, refer to the “Amp Editor owner’s
manual.”
• To adjust (calibrate) the range over which the input voltage to the [GPI] connector is detected, refer to “5. Utility” (page
13) .
GPI connector
● Example : Controlling the ACD1 from a switch ● Example : Lighting the LED of an external device
from the ACD1
• Do not allow the current flowing from the OUT
connector to exceed 75 mA.
● Example : Controlling the ACD1 via a 10k ohm lin-
ear taper potentiometer
● Example : Switching the relay of an external
device from the ACD1 to light an LED
GND OUT GND IN Voltage
NOTE
IN
+V
+5V
A/D CPU
100k
ACD1
OUT
+V
+5V
CPU
10
Max. 75 mA
ACD1
CAUTION
IN
+V
+5V
GND
A/D CPU
100k
Continuously
variable
volume
ACD1
OUT
+V
+
–
+5V
CPU
10
ACD1
Max. 75 mA
NOTE