General Information

• Brand: Foxboro (a brand under Emerson Automation Solutions)
• Model: 0399071D
• Product Type: Industrial Terminal Block Assembly (wiring termination module)
• System Compatibility: Exclusively designed for Foxboro I/A Series Distributed Control Systems (DCS) – compatible with Foxboro I/O modules (analog/digital input/output) and control cabinets.
• Core Function: Provides a centralized, organized interface for connecting field wiring (signal/power cables) to Foxboro DCS modules. It terminates, distributes, and protects signals, reducing wiring complexity and minimizing the risk of connection errors.

Technical Specifications

1. Terminal Configuration

• Terminal Type: Screw-clamp terminal blocks (for secure, vibration-resistant wire fastening).
• Terminal Count: 32 individual terminals (arranged in 16 pairs, suitable for differential signal wiring or power/signal separation).
• Wire Gauge Compatibility: Accepts 22–12 AWG (American Wire Gauge) solid or stranded copper wire – covers most industrial field wiring sizes.
• Terminal Rating:
  • Voltage: Up to 300 V AC/DC (suitable for standard industrial signal and power circuits).
  • Current: 10 A max per terminal (handles typical field device current demands, e.g., 4–20 mA sensors, 24 V DC actuators).

2. Electrical Performance

• Insulation Resistance: ≥100 MΩ (at 500 V DC, 25°C) – ensures no signal leakage between terminals.
• Dielectric Strength: 1.5 kV AC (50/60 Hz) for 1 minute between adjacent terminals – withstands voltage spikes and prevents short circuits.
• Signal Isolation: No built-in galvanic isolation (relies on paired wiring for noise reduction); compatible with Foxboro isolated I/O modules for enhanced noise immunity.

3. Physical & Environmental Specifications

• Housing Material: Flame-retardant thermoplastic (UL 94 V-0 rating) – resists high temperatures and prevents fire spread in control cabinets.
• Dimensions: 100 mm (W) × 50 mm (H) × 30 mm (D) [3.94” × 1.97” × 1.18”] – compact design to save control cabinet space.
• Mounting: DIN rail-mounted (35 mm standard DIN rail) – easy installation alongside other Foxboro DCS components; no specialized tools required.
• Operating Temperature: -40°C to +85°C (-40°F to 180°F) – suitable for extreme industrial environments (e.g., outdoor oil rigs, high-temperature chemical plants).
• Storage Temperature: -40°C to +100°C (-40°F to 212°F).
• Humidity: 5%–95% RH (non-condensing) – resistant to moisture in offshore or humid process areas.
• Vibration Resistance: 5 g (10–500 Hz) per IEC 60068-2-6 – withstands vibration from nearby machinery.
• Protection Class: IP20 (front panel) – designed for enclosed control cabinets (prevents dust ingress; not waterproof).

4. Safety & Compliance

• Certifications:
  • CE (EN 61010-1 for electrical safety, EN 61326-1 for EMC immunity/emissions) – no interference with Foxboro DCS signals.
  • UL 1059 (terminal blocks for electrical equipment) – compliant for North American markets.
  • CSA C22.2 No. 157 (Canadian terminal block standard) – meets Canadian electrical codes.

Key Features

1. Secure Wiring Termination: Screw-clamp terminals provide tight, vibration-resistant connections – prevents loose wires (a common cause of signal loss in industrial settings) and ensures long-term reliability.
2. Organized Signal Routing: 32 terminals arranged in labeled pairs (e.g., “Signal +/–,” “Power +/–”) simplify wiring identification – reduces installation time and makes troubleshooting (e.g., wire tracing) faster.
3. Flame-Retardant Design: UL 94 V-0 housing minimizes fire risk in control cabinets – critical for safety-critical industries like oil & gas or chemicals.
4. Wide Environmental Adaptability: Operates in extreme temperatures (-40°C to +85°C) and high humidity – eliminates the need for climate-controlled cabinets in harsh field locations.
5. Seamless DCS Integration: Custom-engineered for Foxboro I/A Series DCS – aligns with Foxboro I/O module mounting holes and wiring standards, ensuring compatibility without adapter brackets or custom modifications.
6. Cost-Effective Maintenance: Color-coded terminal labels and standardized wiring layout reduce maintenance time – technicians can quickly identify and replace faulty wires without specialized training.

Applications

• Oil & Gas: Terminates wiring for wellhead pressure transmitters (4–20 mA) and pipeline valve actuators (24 V DC) in Foxboro I/A Series DCS cabinets.
• Chemicals & Petrochemicals: Connects reactor temperature sensors (RTD/thermocouple) and chemical dosing pump signals to Foxboro analog input/output modules.
• Power Generation: Organizes wiring for turbine vibration sensors and boiler feedwater flow meters, linking them to Foxboro DCS control modules.
• Water & Wastewater: Terminates signals from level sensors (digital input) and pump controllers (digital output) in Foxboro-based water treatment control systems.

Documentation & Support

• Technical Manual: Foxboro 0399071D Terminal Block Assembly Installation Guide (Document No. 0399071D-IG) – available via Emerson’s official Support Center (Foxboro section), including wiring diagrams, terminal labeling guides, and mounting instructions.
• Compatibility List: Refer to Foxboro’s I/A Series DCS Component Compatibility Matrix to confirm pairing with specific I/O modules (e.g., analog input modules, digital output modules).
• Spare Parts: Replacement terminal screws and labels are available via Emerson’s authorized Foxboro distributors (part numbers: 0399071D-SCR (screws), 0399071D-LBL (labels)).

Ordering Information

• Base Model: 0399071D (32-terminal screw-clamp assembly, standard version).
• Optional Accessories:
  • Terminal Cover (0399071D-COVER): Plastic cover to protect terminals from dust and accidental contact (enhances safety in open cabinets).
  • Wiring Label Kit (0399071D-LABEL): Customizable labels for terminal identification (e.g., “Sensor 1,” “Valve 3”).
• Lead Time: Typically 2–4 weeks for standard orders; 1 week for emergency spares (via Emerson/Foxboro authorized distributors).