Product Type Smart Electronic Valve Positioner Brand / Series Foxboro ECKARDT SRD900 Series Supply Air Pressure Typically 1.4 - 7 bar (20 - 100 psi) Output Action Single-acting (as per code "E") Ambient Temperature Standard: -30°C to +80°C (-22°F to +176°F) Enclosure & Protection Housing Material Aluminum (typical) Ingress Protection (IP) IP66/67 (NEMA 4X equivalent), protected against powerful water jets and temporary immersion. Electrical Input Signal & Wiring 4-20 mA DC, 2-wire system (as per code "B"). The device is powered by the same 4-20 mA loop. Load Resistance Typically up to 850 Ohms at 20 mA (depending on air supply pressure). Intrinsic Safety Available options for Ex ia IIC T6 Ga (must be specified in order code). Connection Cable gland, M20 x 1.5 (as per code "Z"). Mechanical & Pneumatic Mounting Direct mounting per VDI/VDE 3845 standard (as per code "D"). Adapter kits available for other standards. Travel Sensing Mechanically coupled to the valve stem; range defined by the "SG6" code. Air Consumption Very low (in steady state, typically < 0.01 Nl/min). Flow Capacity (Cv) High, allowing for fast valve stroking. Performance & Communication Accuracy High, typically better than ±0.5% of span. Hysteresis Very low, typically < 0.1%. Communication Integrated HART® protocol. This allows for digital communication for configuration, calibration, and diagnostics using a HART communicator or asset management software. This is a standard feature in smart positioners like the SRD960.
