Digital outputs (semiconductive, connected as open collectors) are wired to DOx or DOy.x terminals on the connector. Each connector also features a common DOGND terminal for connecting negative pole of a DC power source. Digital outputs do not possess their own power source and serve only for switching the power source's negative pole from DOGND terminal to the individual DOx outputs where loads can be connected. Switching of each output is indicated by LED with the corresponding label matching the output's marking. The FBD terminal can be used with some loads - see below for more info.
Note:
Digital outputs can be configured to PWM mode (pulse width modulation) using a suitable SW (Mervis, EVOK or by directly editing the registers)
Connection
The following picture describes the basic connection of digital output:
We recommend using the flyback diode available on the FBD terminal to prevent unwanted spikes when using certain loads (such as external relays) connected to digital outputs. The following picture depicts the connection of a contactor to digital output using the integrated FBD diode.
Caution!
The integrated diode is designed only for connecting devices within a single group of DO. Using the diode for other connections can cause irreversible damage to the device.
