The 2100-NS was a compact interface Module that converts RS232 from a computer to RS422/485, for communication to a field data logging system. Its driver and receiver meet EIA standards RS-422-A and CCITT recommendations V.11 and X.27, and are designed for multipoint transmission on long bus lines in noisy environments. It includes thermal shutdown and over current limiting.
It is powered by an external AC/DC adapter, making it suitable for working with many types of PCs and PLC's. It comes complete with the AC/DC adapter, and a 200mm 25way to 9way adapter cable for the PC.