Honeywell Enraf Fusion 4 SSC Controller 2074232-D0

Honeywell Enraf Fusion 4 SSC Controller 2074232-D0 Single Stream Terminal

The Honeywell Enraf Fusion4 Single Stream Controller (SSC), Part Number 2074232-D0, is an explosion-proof, hazardous-area microprocessor controller engineered for precision chemical injection, fuel additive dosing, and stream blending operations across marine bunkering stations, offshore loading terminals, and bulk distribution hubs. Engineered to govern MonoBlock metering manifolds and positive displacement injection systems, the 2074232-D0 ensures compliance with strict custody transfer standards by dynamically synchronizing additive dosage against primary wild-stream flow rates in real time.

The controller utilizes identical high-integrity core hardware running dedicated firmware for additive injection (SSC-A) or stream blending (SSC-B). It provides real-time closed-loop feedback, automated K-factor recalibration tracking, transaction logging up to 10,000 continuous runs, and field diagnostics via a 3.5-inch full-color QVGA screen.

Model Details

• Manufacturer: Honeywell Enraf
• Product Line: Fusion4 Series Single Stream Controller (SSC)
• Model Part Number (MPN): 2074232-D0
• Variant: SSC-A / Single Stream Additive & Blending Terminal Unit
• Display Interface: 3.5″ QVGA High-Visibility Full Color Display (320 x 240 pixels)
• Local Configuration: Fusion4 Handheld Local Access Device (LAD) via IR / Optical Interface

Applications

• Marine bunkering platforms, barge-loading terminals, and offshore fuel transfer skids.
• Fuel additive injection systems (anti-icing, dyes, markers, biocides, cetane/octane improvers, and lubricity agents).
• Inline and sidestream ratio blending for finished petroleum, biofuel (ethanol/biodiesel), and chemical products.
• Single-stream MonoBlock injection manifold control in refinery truck loading bays.
• High-pressure additive dosing skids requiring closed-loop solenoid and flow meter integration.

Technical Specifications

Terminal Allocation & Wiring Architecture

• Mains / DC Power Terminals: Live (L/DC+), Neutral (N/DC-), and Protective Earth (PE). Isolated internal power supply section.
• Stream Flow Meter Inputs (PI1 / PI2): Terminals for Channel A, Channel B (quadrature tracking), 12V/24V sensor excitation power, and isolated signal ground.
• Injection Solenoid Outputs: Solid-state relay drivers rated for high duty-cycle switching of MonoBlock injection solenoids (AC or DC coil rated).
• Control Valve / Relay Outputs: Potential-free Form-C relay contacts for additive supply pump interlock, permissive run commands, and ESD master alarm trip lines.
• Digital Auxiliary Inputs: Opto-isolated inputs wired for tank low-level float switches, clean-arm limit switches, differential pressure feedback, and remote emergency pause.
• Communications Highway: RS-485 dual-wire bus (+, -, Shield) mapped to Terminal Automation System (TAS) / supervisory DCS platforms.

Compatible Equipment

• Metering Hardware: Honeywell Enraf MonoBlock Single and Dual Stream manifolds, Brodie BiRotor meters, Micro Motion Coriolis meters, and Smith Meter positive displacement units.
• Local Terminal Access: Honeywell Fusion4 Local Access Device (LAD) and hand-held ATEX-certified infrared (IR) configuration tool.
• Supervisory Software: Honeywell Fusion4 Portal, Fusion4 MSC-L loading computers, Experion Process Knowledge System (PKS), and third-party TAS packages running Modbus RTU/TCP.
• Injection Pumps: Low/medium/high pressure pneumatic and motorized chemical injection pump skids (Haskel, Milton Roy, Lewa).

Part Number Cross-References

• Honeywell Product Code: 2074232-D0
• Direct Family Part Numbers: 2074232 Series, SSC-A (Additive), SSC-B (Blending)
• Companion Sub-Assemblies: CAN-HMI-SSC Main Board, CAN-ADD-BLEND Board, 4418040 LAD Handheld Unit

Frequently Asked Questions

What distinguishes the Honeywell Enraf Fusion4 SSC from the MSC series?

The Fusion4 SSC (Single Stream Controller) is purpose-built to control a single additive injection or blending stream with dedicated localized I/O. The MSC (Multi-Stream Controller) is an expanded central platform capable of handling up to 24 streams simultaneously across multiple loading arms. The SSC provides high-integrity distributed control at the skid or injection point.

Can the 2074232-D0 unit handle both additive injection and product blending?

Yes. The Fusion4 SSC utilizes a standardized hardware design. While the hardware remains identical, specific firmware licenses configure the device for additive injection (SSC-A) or ratio blending (SSC-B) operations.

How do field technicians calibrate the meter and update pulse K-factors?

Calibration can be performed directly on-site using the intrinsically safe handheld Local Access Device (LAD) or via an approved infrared (IR) remote controller through the display window without opening the explosion-proof enclosure. The built-in Calibration Wizard tracks proving runs, saves volume counts, and recalculates meter factors automatically.

Which industrial protocols are supported for Terminal Automation System (TAS) integration?

The unit features onboard RS-485 serial communication supporting Modbus RTU, Modbus Legacy, FlexConn, and FMC Smith protocols, allowing drop-in compatibility with legacy and modern supervisory control systems.

What happens if the wild stream flow stops unexpectedly during a transaction?

The controller continuously calculates the proportional injection rate. If the wild stream pulse input drops below the configured low-flow threshold or ceases, the controller closes the injection solenoid to prevent over-dosing, logs the condition, and holds the batch volume until flow resumes.