The OPTO 22 AC28 Interface Card provides a bridge between an ISA bus host system and the PAMUX I/O bus, enabling communication with PAMUX‑equipped modules. This Opto 22 interface card is used in industrial automation where legacy ISA‑compatible controllers or PCs must interface with PAMUX field I/O networks. By converting signals between the ISA and PAMUX buses, the AC28 supports integrating PAMUX‑based I/O into older control architectures.
