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USB I/O Expansion Unit, 2 Expansion Slots, Serial Bus

PC-compatible 80MHz PROFIBUS Remote I/O unit, 512kb Flash, 512kb SRAM, 1xRS232, 2 Expansion Slots

2-slot CANopen Remote I/O Station

2-slot DeviceNet Remote I/O Station

I/O Expansion Unit, 2 Expansion Slots, Serial Bus