Omron CS1W-B7A21 Basic I/O Modules, 16 inputs, 16 outputs, interface units
Omron CS1W-B7A22 Basic I/O Modules, 32 inputs, 32 outputs, interface units
Omron CS1W-B7A12 Basic I/O Modules, 32 inputs, interface units
Omron CS1W-B7A02 Basic I/O Modules, 32 outputs, interface units