Black Box RS-232<->RS-485/422 Converter Plus with Opto-Isolation - serial adapter

Black Box doubled the speed of its top-selling converter to keep up with today's PCs. So if your PC has a 16550 UART chip, you can send data at 115.2 kbps! The RS-232/485/422 Converter Plus has a line bias feature that prevents it from receiving line noise as send or receive signals. Works in all popular 2- or 4-wire applications too.