The Remote I/O Modules, which include Driver and Receiver circuit boards, provide a serial, long-distance, communications interface between local and remote I/O
locations. The Remote I/O Modules features and benefits
are summarized in Table 1.
The Remote I/O modules support two types of serial communications interfaces: 2-twisted pair and RS-232-C
(modem). The twisted pair interface consists of two unidirectional data lines (Transmit Data and Receive Data)
through which data and control signals can be transferred
10,000 feet (3 km) at rates up to 57.6K baud.