Robust DataComm Isolated 3-way RS-232 Arbitrator, DIN-Rail Mount, 9 - 48 Vdc Supply, Full 4-of-4 Ground Isolation, Slave Port C with 3-way screw terminal, Master Ports A & B with DB9 connectors. Product ID: rdc232Arb-gv-4p-cd
Robust DataComm RS-485 Modbus Ring Master, 9-36 VDC Powered. Product ID: rdcRM-dv-4p-c-c-c-c
Robust DataComm Multimode to Singlemode Fiber Optic Converter With Digital I/O, DIN-Rail Mount, 9-48 VDC Powered, ST Connectors. Product ID: rdcFOms-DIO-gv-2p-st