Developed by Allen-Bradley for communication between control and
substations, DF1 is the successor protocol to the "Data Highway" or "Data
Highway Plus" protocols (see also ANSI X3.28) by the same company.
Like its predecessor protocol, it is based on the American ANSI X3.28 standard.
DF1 Application Layer
RS232 (V.24), RS485
Universal protocol converter for highest degree of flexibility