GPIO In (Core 8 Flex, I/O-8 Flex )

The GPIO allotment on the Core 8 Flex and I/O-8 Flex totals eight inputs and eight outputs. Configure each independent input and output in the Properties pane.

Flanking each row of eight GPIO inputs and outputs is a +12V DC terminal and a ground or reference terminal that can be used for potentiometers (input), relay coils and LEDs (output), and other uses. The +12V pins use a self-resetting fuse and each has up to 100 mA available.

Tip: For additional properties not listed, refer to the Properties Panel help topic for more information.

GPIO 1-8 Type

GPIO Type 1-8

Select the Type of GPIO input:

• Digital Input (TTL 3.3V)
• Contact Closure Input
• Potentiometer (10k Ohm, 12V)
• Potentiometer (2-wire)
• Analog Input (0-24V, low z)
• Raw

Digital Input (LED)

This LED illuminates when there is a digital input on a GPIO pin. Each of the following Types of input has an LED to indicate a digital input is present:

• Digital Input (+3.3VDC)
• Contact Closure – When this Type is selected, the pin has approximately 9 to 10VDC present when the contact is open (or nothing is connected) and the LED is off. When the contact is closed (pin is shorted to ground), the LED is on.
• Raw

Analog Input (Knob)

The analog input knob is provided when one of two Input Types is selected.

• Analog – allows a low impedance, 0 – 24VDC low z signal input
• Raw

Both input voltages are displayed on a read-only knob control.

Potentiometer - Min Position, Calibrate Min, Max Position, Calibrate Max

The Potentiometer knob follows the position of the physical potentiometer connected to the GPIO pin. To calibrate Q‑SYSto the potentiometer:

1. Turn the physical potentiometer to its minimum position.
2. Click the Calibrate Min button. A value displays in the Min Position field.
3. Turn the physical potentiometer to its maximum position.
4. Click the Calibrate Max button. A value displays in the Max Position field.

If you know the values for Min Position and/or Max Position, you can enter them manually.

Pullup Enable

Provides a 5.11K Pullup resistor to +12VDC on the input pin when the Type is Raw.

The Control Pins that show, depend on the type of GPIO in use. You must select the Type (Potentiometer or Raw) to make these Control Pins accessible.

Pin Name	Value	String	Position	Pins Available
Potentiometer
Calibrate Maximum	0 1	false true	0 1	Input
Calibrate Minimum	0 1	false true	0 1	Input
Maximum Position	0 to 1.00	0 to 1.00	0 to 1.00	Input / Output
Minimum Position	0 to 1.00	0 to 1.00	0 to 1.00	Input / Output
Raw
Pullup Enable	0 1	false true	0 1	Output