The Siemens 6DR5616-.....-.... is a SIPART PS2 smart electropneumatic positioner with FOUNDATION Fieldbus communication, rated for Ex/nEx environments. It is single-acting, housed in a stainless steel flameproof (Ex d) enclosure, and designed for pneumatic linear and part-turn actuators.
Where it is used
This class of positioner is used in process valve control loops — throttling a control valve on a steam line, positioning a butterfly valve on a chemical feed, or stroking a linear actuator on a compressor recycle loop. The FOUNDATION Fieldbus variant fits into a distributed control system (DCS) that speaks FF H1, common in refineries, power plants, and pharmaceutical batch processes.
Lifecycle and sourcing reality
RoHS compliance is confirmed since 31 December 2016. REACH candidate list information is available on request. Export control is AL N / ECCN N, meaning no special license is required for most destinations.
Group and product codes for traceability
The Group Code is R3P2 and the Product Group is 4759. These are internal Siemens classification codes used for BOM cross-referencing and spares identification in some ERP systems. They do not affect fit or function but can help match the correct variant when the full order code suffix is not legible on the nameplate.