AD2B SEI TO RS-232 ADAPTER (9-PIN)

AD2B Product Description

The AD2B adapter allows the RS-485-like signal of SEI devices to interface to a standard RS-232 port (9-pin DB), such as those in IBM-compatible PCs. The SEI (Serial Encoder Interface) bus is a simple, quick, and convenient network of SEI devices interfacing to an RS-232 serial port. The SEI bus supports from 1 to 15 devices on a single 6-wire telephone-type cable, up to 1000 feet long. For more information on the SEI bus, please see the SEI page.

The AD2B has 2 differential signals to interface to SEI devices: the bidirectional data pair for communication and the busy input pair for data flow control. The PS-12 power supply connects to the AD2B and furnishes power for all SEI devices on the bus.