Advantech
BB-232OPDRI
Serial Repeater, RS-232, TB, Triple Isolated, 10-48VDC, DIN Rail Mount, UL C1/D2
Serial Converter, Converts RS-232 to RS-422/485 Converter, Triple Isolated, C1D2, DIN Rail Mount, DB9F / TB, 10-48VDC External Power Supply Sold Separately