Foxboro FEM100 Fieldbus Expansion Module

Technical Specifications Module Type: Fieldbus Expansion Module Compatible Controller: Foxboro FCP270 Field Control Processor Expanded Fieldbus Ports: Four 2 Mbps HDLC fieldbus ports Maximum FBM Capacity: Each expanded port supports up to 32 pieces of 200‑series FBM modules Operating Power: 24 VDC Operating Temperature: 0 °C to +60 °C Storage Temperature: −40 °C to +85 °C Relative Humidity: 5%‑95%, non‑condensing Mounting: Dedicated FEM100 expansion baseplate installation Certifications: CE industrial fieldbus expansion module compliance

Functional Features Expands four high‑speed HDLC fieldbus ports for FCP270 controller, greatly increasing accessible FBM quantity. Each expanded fieldbus port supports up to 32 pieces of 200‑series FBM modules. Supports fieldbus‑link redundancy to reduce communication‑interruption risk. Front‑panel LED indicators display power and each expanded‑port communication‑activity status. Hot‑swappable module design for on‑site replacement without power‑off of whole rack.

Application Scenarios Applied for large‑scale I/A Series DCS projects adopting FCP270 controller, where single controller needs to carry large‑quantity 200‑series FBM I/O modules. Widely used in large petrochemical and chemical‑plant control cabinets.

Structural Characteristics Compact rugged aluminum modular housing. Gold‑plated bottom connector for electrical connection with dedicated FEM100 baseplate. Front‑panel multi‑channel LED indicators for power and four‑port fieldbus‑activity status. Baseplate provides physical interface connecting to FCP270 controller fieldbus.

Working Principle FEM100 connects to native fieldbus port of FCP270 controller via dedicated baseplate. Internal circuit completes fieldbus signal splitting and driving, outputs four independent expanded HDLC fieldbus ports. Each port can connect FBM I/O module baseplates. Process‑data and control‑commands from FCP270 are distributed to each expanded fieldbus segment. Field‑acquired data from FBM modules flows back to FCP270 through FEM100.

Installation Requirements Mount dedicated FEM100 expansion baseplate on standard 35 mm DIN‑rail inside control cabinet. Insert FEM100 module onto baseplate and lock mechanical buckle. Complete inter‑connection cable wiring between FEM100 baseplate and FCP270 controller baseplate.