GPIO

Analog Inputs

Value

Displays a representation of the input voltage level range. The minimum value is represented by zero and the maximum by 1.0. Typically, these inputs are physically connected to a potentiometer.

Tip: The knob control cannot be gestured, but you can duplicate it and wire the copy to other controls in your design. This enables you to pass the values to other controls.

Calibrate

Sets the range of recognized input values arriving into the analog inputs.

After the potentiometer has been installed, and you are ready to set the minimum and maximum values:

  1. Click Calibrate to start calibration.
  2. Sweep the pot from the minimum to the maximum twice.
  3. Click Calibrate again to stop calibration.

    Note: Calibration takes into account the resistance of the wire and the tolerances of the potentiometer.

Min Calibration

Max Calibration

The minimum and maximum recognized analog input values.

If you leave these values set to zero, they will be updated automatically by the calibration process.

Alternatively, you can specify values by typing in the boxes. This allows you to restrict the range of values that can be generated by a potentiometer.

Squelch

A control noise squelch that adjusts the bit resolution of the analog input. The higher the squelch value, the greater the change in value required in the input in order for it to be recognized as a change. This is typically used when the input signal is fluctuating because of noise.

We recommend that you use the minimum squelch value possible in order to stop the input signal fluctuating.

Digital Inputs

Status

Lit (green) when digital input is detected on the pin.

Digital Outputs

On/Off

Click to enable digital output on the pin.

2.5V high level (LVTTL) short circuit current 1.4mA.

High Current Outputs

On/Off

Click to enable output on the pin.

Voltage is as supplied by external DC power (Ext Pwr connector). Absolute max. current draw 0.5A per I/O. Total limited by external PSU.

Not available if using PoE.

Relays

On/Off

Click to control the contact-closure circuits. Max voltage 30V DC, max current 1A.

See also

CAB 8n

Audio

Serial

Status