ZMC303 Hardware Manual Version1.3
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Chapter III Expansion Module
There are ZIO series expansion modules which support ZCAN protocol and EIO
series expansion modules which support EtherCAT protocol. See related hardware
manual for reference.
3.1 Wiring Reference For CAN, Input, Output and Power
ZMC3 series controller uses single power. ZIO expansion module card uses
double power to supply, in actual application , ZIO power channels on expansion
modules can share the same power supply.
When controller and ZIO module uses different powers, the EGND of controller
must be connected to the GND of expansion modules, otherwise CAN bus may
be burned out.
When multi expansion modules are linked on CAN bus, it is necessary to connect
120Ω resistor between CANL and the CANH on the last IO expansion module.