Profibus-PA General Specification
Profibus-PA (Process Automation) uses synchronous transfer mode technology, as defined in IEC 61158-2, to communicate between field devices and the RS 485 backbone of Profibus-DP. A segment coupler, or gateway is installed to bridge profibus-DP with Profibus-PA. Otherwise, the protocols are identical, allowing transparent communication between general purpose automation systems and decentralized field devices.
More Information About Profibus-PA
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Typical System Configuration: