DLC-250.4 LOUDSPEAKER CONTROLLER
17
Configuration
5.5 GPIO Setup and Connection
THEORY DLC amplifiers provide a GPIO socket that enables
remote control of volume, standby, mute and trigger functions.
The GPIO connector pin functions are described in the
GPIO
Settings
menu illustrated in
Diagram 5l
. The connection
of GPIO based remote volume control and standby/mute are
illustrated in
Diagram 5m
and
Diagram 5n
respectively.
Note: The GPIO connector must not be used for any
unintended purpose. Amplifier damage may result from
incorrect use of GPIO.
Note: Shielded cable must be used when connecting
standby switches and potentiometers via GPIO.
Note: GPIO Pin 8 has a low output impedance and is able
to supply a maximum current of 10mA.
Note: GPIO Pin 1 and Pin 3 both offer ground connections: Pin 1 is
connected directly to the amplifier chassis.
Pin 3 is connected to the chassis via a 220 Ohm resistor. The ‘soft
ground’ connection of Pin 3 is potentially useful for managing
ground loops that may cause audible hum.
Diagram 5l
GPIO Settings Menu
