The GPIO connectors enable remote control of key parameters of SmartAmp:
*In order to conform to EMC specifications, shielded cable must be employed
when connecting external volume control potentiometers to the GPIO connectors.
This is to prevent the cable acting as an antenna for any radiated emissions from
within the amplifier.
Be sure to use the appropriate Euro Block connector for the GPIO inputs
GPIO (General Purpose In/Out) Connections
Function
Notes
GPIO GND (1)
Ground reference for all GPIO pins
GPIO v12 (2) *
Channel 1 & 2 auxiliary gain
control
Connect to a potentiometer (>10kΩ) wiper between
the VCC and GND pins. The maximum level available
when using GPIO control is defined by the front panel
gain control setting.
GPIO V34 (3) *
Channel 3 & 4 auxiliary gain
control (four channel amplifiers
only)
Connect to a potentiometer (>10kΩ) wiper between
the VCC and GND pins. The maximum level available
when using GPIO control is defined by the front panel
gain control setting.
GPIO VCC (4)
Control voltage output
Provides a 3.3V DC control output (100Ω
output impedance) for up to two volume control
potentiometers (>10kΩ)
GPIO STB (5)
Alarm Mute
Connect to GND pin to mute the unit and place it in
standby mode
GPIO GPO (6)
Mute Out
OV DC indicates normal status, +3.3V DC indicates
one or more channels in protection mode
10/20
SmartAmp
Amplifiers with DSP
Amplifiers
USER GUIDE
© 2021. Optimal Audio Group Ltd. (v1.0)
Introduction
Overview
Start using
Power up
Rear panel
Inputs
Outputs
>
<
Dip switches
GPIO
Installation
Maintenance
Tech specs
Appendix A
Appendix B
Appendix C
Safety info
