2Port RS422, RS485 RS-422, RS-485 Serial Board
**ISA Adapter**
Professional range of PC adapter cards that plug directly in to the IBM PC bus. The adapter cards can be jumpered for operation as COM1, 2, 3 or 4.
Allied Electronics:
ISA Bus Serial Port RS422/485, Non-isolated
Verical:
ISA Bus Serial Port RS422/485, Isolated
Newark:
# OPTO 22 AC422AT COMPUTERS, INTERFACE CARDS
MASTER:
ISA Bus Serial Port RS422/485, Isolated
Electro Sonic:
ISA Bus Serial Port RS422/485, Isolated