PartNumberDescriptionSCM9B-17017inputs/8outputs,RS-232COutputSCM9B-17027inputs/8outputs,RS-485OutputSCM9B-171115inputsoroutputs,RS-232COutputSCM9B-171215inputsoroutputs,RS-485OutputSCM9B-H175024inputsoroutputs,userselectedRS-232CorRS-485OutputSCM9B-H177764inputsoroutputs,userselectedRS-232CorRS-485Output