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.

ISO/OSI Model

7	Application Layer	DF1 Application Layer
6	Presentation Layer	n/a
5	Session Layer	n/a
4	Transport Layer	n/a
3	Network Layer	n/a
2	Link Layer	ANSI X3.28
1	Physical Layer	RS232 (V.24), RS485

Applicable Products

ipConv

Universal protocol converter for highest degree of flexibility
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