The Siemens 6DR5623-.....-.... is a SIPART PS2 smart electropneumatic positioner with FOUNDATION Fieldbus communications, designed for pneumatic linear and part-turn actuators. It carries Ex/nEx approval and is housed in an aluminum enclosure with double-acting output.
FOUNDATION Fieldbus integration means this unit speaks the H1 protocol natively — no external gateway needed for a FF segment. The double-acting output suits spring-return or double-acting actuators; the aluminum enclosure provides corrosion resistance for process environments where stainless is overkill but painted carbon steel would degrade. Ex/nEx rating covers both hazardous-area and safe-area installations, simplifying one BOM line for mixed-zone plants.