OPF-TH2000/OPF-RH2000 User’s Guide226.1.3 RS-232C connectorD-sub 9 pin, maleRS-232C connector1 56 9RS-232C connector pin assignments■ Connection to PCsMake sure to use a cross cable when connect to a PC.RDTDN.C.N.C.N.C.N.C.GNDRTSCTSPin No.132465798SignalRDTDN.C.N.C.N.C.N.C.GNDRTSCTSSignal(RX data)(TX data)(Ground)(TX request)(RX request)OPF-2000 PC(No connection)(No connection)(No connection)(No connection)OPF-H2000 and PC are connected■ Connecting to an IDK’s productMake sure to use a cross cable when connect to an IDK’s product.RDTDN.C.N.C.N.C.N.C.GNDRTSCTSPin No.132465798SignalRDTDN.C.N.C.N.C.N.C.GNDRTSCTSSignal(RX data)(TX data)(Ground)(TX request)(RX request)OPF-H2000 IDK’s product(No connection)(No connection)(No connection)(No connection)OPF-H2000 and IDK’s product are connected■ Connecting to a product requiring straight cablingMake sure to use a straight cable when connect to a product that needs straight cabling.RDTDN.C.N.C.N.C.N.C.GNDRTSCTSPin No.132465798SignalTDRDN.C.N.C.N.C.N.C.GNDCTSRTSSignal(RX data)(TX data)(Ground)(TX request)(RX request)OPF-H2000 Another company’s product(No connection)(No connection)(No connection)(No connection)OPF-H2000 and another company’s product requiring straight cabling are connected*N.C.: No Connection