The 6DR5625-.....-.... is a Siemens SIPART PS2 smart electropneumatic positioner with Foundation Fieldbus communication, built for pneumatic linear and part-turn actuators in hazardous areas. The aluminum flameproof (Ex d) enclosure and double-acting output suit it for valve control loops where intrinsic safety and bus integration are required.
Foundation Fieldbus means the positioner connects directly to a digital control network, carrying process variable, setpoint, and diagnostics over a single twisted pair — no analog I/O channel per valve. The Ex d (flameproof) enclosure contains any internal ignition, so the unit can be mounted in Zone 1 gas groups without an additional barrier. Double-acting output drives spring-return or double-acting actuators, covering both fail-safe and modulating applications. Group code R3P2 and product group 4759 are internal Siemens cataloging identifiers that confirm the part's classification for order processing and logistics routing.
RoHS compliance is confirmed since 31-Dec-2016, and REACH candidate list information is available. No UL or IEC certification is stated in the available data; the primary approvals are ATEX/IECEx implied by the Ex d designation.