The OPTO 22 AC422AT is a versatile RS-422/485 adapter card that provides reliable serial communication for IBM PC-compatible systems. This non-isolated adapter card features transient protection and bi-directional handshake lines (RTS and CTS), enabling robust data transfer in industrial environments. It supports baud rates up to 38,400 and distances up to 5,000 feet, making it suitable for connecting to a wide range of devices and networks. The AC422AT is configurable for COM1-COM4 and offers full hardware and software compatibility, simplifying integration into existing systems.