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→ Wiring Note:
When connecting multiple ZIO expansion modules on the CAN bus, a 120-ohm
resistor needs to be connected in parallel between the CANL and CANH terminals, for
the ZIO expansion module that is with 8-digit dialing codes, the terminal resistor can
be realized by dialing the code (DIP).
The maximum output current of output can reach 300mA, when the load exceeds the
power, it is necessary to add relay.
It is recommended that the internal power supply 24V and the external digital IO
power supply 24V should be separately powered, and two 24V power supplies can be
used, or a power supply that can provide two isolated 24V outputs. When the touch
screen is connected through a serial port, the power supply of the touch screen is
provided by the internal power supply 24V.
Both sides of the CAN bus communication must ensure that the corresponding GND
is connected or the main power supply of the controller and the main power supply
of the expansion module use the same power supply.
When the controller and the expansion module are powered by different power
supplies, the ground of the main control power supply of the controller should be
connected to the GND of the power supply of the expansion module, otherwise the
CAN may be burned.
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