The 6DR5516-.....-.... is a SIPART PS2 smart electropneumatic positioner from Siemens, communicating over PROFIBUS PA. It is single-acting, housed in a stainless steel enclosure rated flameproof (Ex d), and designed for pneumatic linear and part-turn actuators.
Product class C means this is manufactured to order — not a stocked shelf item. Lead time is quoted against an RFQ; no returns or reuse after the order is cut. RoHS compliant since 31-12-16, with REACH candidate-list documentation available. Export controls are AL: N / ECCN: N, so no special licensing for cross-border shipment.
Integration notes
PROFIBUS PA interface means it drops onto a segment with other PA devices — no analog I/O card needed. Single-acting design suits spring-return actuators; for double-acting you'd need a different variant in the PS2 family. The Ex d flameproof enclosure allows mounting in Zone 1 gas groups without an external purge system. SST body handles washdown and corrosive atmospheres better than aluminum.