User Manual
These I/O ports are configured via System > I/O Ports. Each port can be configured with a default
direction and state.
Select the System > I/O Ports menu
7.4.1 Digital I/O Output Configuration
Each of the two digital I/O ports (DIO1 and DIO2) can be configured as an Input or Output port. To use
them as digital outputs first configure the port direction on the System > I/O Ports menu page.
The DIO1 and DIO2 pins are current limited by the chip to 20mA and accept 5V levels – so they cannot
drive a relay etc.
Alternately you can change the output states using the ioc command line utility. The following text is the
usage message from the ioc usage:
ioc: digital io-port controller:
-p pin_num pin number (1 to 4)
-d pin_dir pin direction (0 = output 1 = input)
-v pin_val pin electrical value in output mode (0 = low 1 = high)
-r reset pins to all inputs and low
-g displays the pin directions and current values
-l load pin configuration from configlity
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