BLIC821A

IC821A

Black Box

The Async RS232 to RS422/485 Interface Converter from Black Box is a bi-directional converter that isolates and converts RS-232 signals into RS-422/RS-485 signals and vice versa without requiring external software control. The RS-232 input is wired for DCE through a DB9 female connector, and RS-422/RS-485 signals are interfaced through a removable terminal block. An optional 120-VAC/12-VDC Wallmount Power Supply (PS1003) is required to supply external power to the terminal block. For RS-232, the connection requires RD, TD, and Signal Ground, and in RS-422 mode, the driver is always enabled for full-duplex communications.