Operational Function and Logic
The Foxboro RH916DB serves as a critical data transmission link within the EcoStruxure Foxboro DCS (formerly I/A Series) architecture. By providing a high-integrity electrical pathway, this cable actively connects baseplates, I/O modules, and system processors to ensure synchronized data flow. Once integrated into the system cabinet, the cable facilitates the exchange of real-time process variables and control commands between the field-level hardware and the supervisory control layer. Because it utilizes specialized shielding and impedance matching, it maintains the signal purity required for high-speed digital communications in electrically noisy industrial environments.
Performance Enhancements and Safety Features
- Ensures Superior Signal Fidelity: The RH916DB is engineered with twisted-pair geometry and low-capacitance insulation. In doing so, it actively minimizes crosstalk and signal attenuation, which is vital for maintaining data accuracy over longer cabinet runs.
- Shields Against Electromagnetic Interference: The cable features a high-density braided shield along with an integrated foil wrap. As a result, it provides a robust barrier against RFI and EMI, protecting the sensitive logic of the Foxboro DCS from external electrical transients.
- Optimizes Cabinet Organization: By utilizing a flexible yet durable outer jacket, the RH916DB allows for tight bend radii within crowded marshalling panels. Consequently, it enables a cleaner, more professional installation that simplifies future hardware upgrades and cable tracing.
- Withstands Industrial Mechanical Stress: Beyond its electrical properties, the cable is constructed with flame-retardant materials and a ruggedized jacket. Therefore, it resists the mechanical wear, chemical exposure, and thermal fluctuations common in petrochemical and power generation facilities.
- Simplifies System Interconnection: Finally, the cable is typically terminated with high-reliability connectors designed for the Foxboro backplane interface. By providing a secure locking mechanism, it ensures that vibrations or accidental pulls do not lead to intermittent communication failures or system trips.
Technical Specifications
- Brand: Foxboro
- Model Code: RH916DB
- Cable Type: Shielded Multicore System Cable
- Primary Application: Foxboro DCS / I/A Series Interconnection
- Jacket Material: Flame-retardant Polyvinyl Chloride (PVC) or LSZH (Low Smoke Zero Halogen)
- Shielding: Overall Tinned Copper Braid and Foil Shield
- Voltage Rating: 300 V (Typical for signal-level cables)
- Temperature Range: –20 °C to +80 °C (Fixed Installation)
- Connector Type: Application-specific (e.g., D-Sub or proprietary Foxboro headers)
- Impedance: Optimized for Foxboro fieldbus or module-bus signaling
- Standard Compliance: UL listed and RoHS compliant
