There are 6 logic outputs, also known as “General Purpose Outputs” or “GPO”. They are used to control LED’s or relays. The logic output can source 10mA at 5V DC, or sink 60mA up to 50V DC.
Assignment of Logic Outputs is similar to assigning control inputs.
An LED control is the typical object that is assigned to a logic output.
When assigning this object to the control port, a dialog will ask if you want the action to be:
Normal (Control or LED in the ON state, causing the logic port to go High, +5v)
Inverted (Control or LED in the ON state, causing the logic port to go Low, 0v).
The logic outputs can be used to drive indicators or third party devices. For example Logic Outputs can trigger infra-red commands (to control DVD players etc) or power relays to turn other equipment on or off.
Current source:
This is intended for LEDs. The unit can supply up to 10.5mA at around 5V. An LED can be connected directly without the need for a current limit resistor. When assigning the Control or LED to the port in Audio Architect, set the control port for normal mode.
Current sink:
This is intended for relays and higher power devices. The unit can sink up to 60mA from an external supply. If more current is driven into the port, the control port automatically decreases its ability to sink current, protecting the circuitry. As there is hysteresis within this circuit, the full sink capability will not return until current is decreased to below 60mA. When assigning the Control or LED to the port in Audio Architect, set the control port for inverted mode.
Opto Output:
In addition to the six standard logic outputs, there is an isolated output, which fails safe (open circuit) if the unit becomes faulty.