Foxboro P0916PWOC I/A Series Isolated 4‑20mA Analog Input Module with Over‑range Cut‑off

Technical Specifications Input Signal Type: 4‑20 mA DC analog current signal Input Current Range: 0‑24 mA DC Hardware Over‑range Cut‑off Threshold: 26 mA Input Burden Resistance: 250 Ω typical value Per‑channel Galvanic Isolation Voltage: 500 V RMS Transient Surge Suppression: 1500 V Operating Power Supply: 24 VDC from system backplane bus Communication Protocol: Proprietary 2 Mbps HDLC fieldbus for I/A Series system Operating Temperature: ‑40 ℃ to +70 ℃ Storage Temperature: ‑50 ℃ to +85 ℃ Relative Humidity: 5%‑95%, non‑condensing Mechanical Dimension: Standard single‑slot plug‑in module for Foxboro I/A Series rack Certifications: CE, UL, ATEX, IEC 61508 functional safety compliance

Functional Features Supports multi‑channel 4‑20mA analog current signal acquisition with per‑channel independent galvanic isolation. Built‑in hardware over‑range cut‑off protection responding to over‑current input event. Hardware filtering function for restraining industrial electromagnetic interference noise. Each channel realizes complete electrical isolation between field side and internal backplane circuit.

Application Scenarios Process industry distributed control system(DCS). Petrochemical plant high‑risk production unit analog signal acquisition loops. Oil & gas site field with frequent surge interference transmitter signal monitoring. Chemical plant field with large ground potential difference signal collection.

Structural Characteristics Standard single‑slot plug‑in structure matching Foxboro I/A Series rack. Front panel equipped with status LED indicators for power supply, channel fault, over‑range alarm and fieldbus communication.

Working Principle Field 4‑20mA current analog signals flow into module through front‑side terminal connectors. Hardware filter circuit filters high‑frequency interference noise. Every channel adopts independent isolation unit to complete electrical isolation between field circuit and module internal logic circuit.

Installation Requirements Insert module into designated slot of Foxboro I/A Series standard rack. Ensure rack ground connection strictly complies with official system grounding specification. Field signal wiring must adopt shielded twisted‑pair cables. Signal cable routing shall separate from power cable to avoid crosstalk.