4x D-Sub9 RS-232/422/485 software selectable (DB models) or 4x 5.08mm 5-Pin Terminal block RS-232/422/485 sw selectable (TB models)

Industrial 4-Port Serial Device Server, DB9(M), RS-232/422/485, SFP 100/1000 slot,dual power inputs

Industrial 4-Port Serial Device Server, Terminal Block, RS-232/422/485, 3KV Iso,SFP 100/1000,dual pwr

Industrial 4-Port Serial Device Server, Terminal Block, RS-232/422/485,SFP 100/1000 slot, dual pwr