Description
Product Overview
Emerson A6428R is a high-density, 16-channel analog input card for the DeltaV S-series distributed control system (DCS) with Electronic Marshalling architecture. The «A64» prefix identifies it as part of the S-series I/O card family. It installs into a CHARM I/O Card (CIOC) carrier and works in conjunction with individual, hot-swappable CHARM (Choice for Highly Advanced Remote Marshalling) signal conditioning modules (e.g., AI CHARMs). Its primary function is to provide high-accuracy, isolated analog-to-digital conversion for field signals from transmitters (4-20mA), RTDs, and thermocouples. It acts as the data acquisition and communication hub, digitizing the conditioned signals from the CHARMs and transmitting the data to the DeltaV controller over the internal network.
The core value of the A6428R lies in its central role in enabling Emerson’s revolutionary Electronic Marshalling concept within the DeltaV S-series system. This architecture fundamentally decouples field wiring from system configuration. The A6428R, paired with flexible CHARMs, eliminates the need for pre-defined, hardwired I/O card types. For engineers and system integrators, this translates to unprecedented flexibility, reduced project risk, and lower total cost of ownership. Field wiring is completed once on the CHARM terminal blocks, and signal types (current, RTD, etc.) are assigned via software. This allows for late-stage design changes, simplifies FAT/SAT, and enables easy future modifications without rewiring. Its 16-channel density optimizes cabinet space and hardware costs, making it a cornerstone of modern, adaptable process control systems.
Technical Specifications
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Parameter Name
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Parameter Value
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Product Model
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Emerson DeltaV A6428R
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Manufacturer
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Emerson Process Management
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Product Family
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DeltaV S-series Electronic Marshalling I/O
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Primary Function
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16-Channel High-Density Analog Input (AI) Card
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Electrical Characteristics
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Channel Count: 16 isolated analog input channels. Each channel interfaces with a corresponding CHARM module via the CIOC backplane.
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Supported Signals: The specific signal type and range are defined by the CHARM module (e.g., 4-20mA, 0-10V, RTD, Thermocouple). The A6428R provides the high-resolution ADC and communication interface.
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Analog-to-Digital Converter (ADC): High-resolution, typically 16-bit or higher, ensuring precise measurement.
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Channel-to-Channel Isolation: High-grade channel-to-channel isolation (typically ≥250V AC rms) to prevent ground loops and cross-talk.
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Common-Mode Rejection Ratio (CMRR): High CMRR for excellent noise immunity in industrial environments.
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Accuracy: High accuracy, typically better than ±0.05% of span, depending on the connected CHARM type and signal range.
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Update Rate: Fast channel scanning to meet process control requirements.Safety & Architecture
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Architecture: Single-channel architecture per point. High availability is achieved through controller redundancy (1:1) and the hot-swappable nature of the CHARMs and card itself. Its key innovation is the flexibility provided by the CHARM interface.
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Diagnostics: Comprehensive onboard diagnostics including:
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Module communication status
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Power supply monitoring
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Internal circuit self-checks
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CHARM communication status monitoring
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Hot-Swap Capable: Supports true hot-swap replacement of both the A6428R card and individual CHARM modules without system shutdown, maximizing availability.Mechanical & Integration
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Form Factor: Standard DeltaV S-series card size. It installs vertically into a dedicated slot on a CIOC-4 or CIOC-8 CHARM I/O Card Carrier.
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Connectors: Connects via a high-reliability backplane connector to the CIOC carrier, receiving conditioned signals from CHARMs and communicating with the DeltaV controller.
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LED Indicators: Front-panel multi-status LEDs for Power, OK/Run, Fault, and Network Activity.
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Configuration: Fully configured via DeltaV system software. The card model is defined in the hardware configuration, while each channel’s parameters (signal type, range, engineering units, alarms) are configured in the associated CHARM definition.Environmental
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Operating Temperature: 0 to 60°C (32 to 140°F)
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Certifications: Compliant with CE, cULus, and other industrial standards. Part of the certified DeltaV system for use in demanding industrial environments.
Key Features and Advantages
Enables Electronic Marshalling: This is the defining feature. The A6428R is the engine that makes Electronic Marshalling work. It separates signal conditioning (CHARM) from data acquisition, allowing field wiring to be completed independently of controller strategy. I/O type assignment becomes a software exercise, dramatically reducing engineering and wiring errors.
Unmatched Flexibility and Reduced Engineering Time: Signal types can be changed at any project phase—even after commissioning—by simply reconfiguring or swapping a CHARM module in software. This de-risks projects, speeds commissioning, and simplifies future modifications.
High Channel Density: The 16-channel design provides excellent I/O point density, reducing footprint, cabinet size, and hardware costs compared to traditional 8-channel cards.
Enhanced Maintainability and Availability: Both the A6428R card and CHARM modules are hot-swappable. A faulty channel or card can be replaced online without impacting other loops, minimizing process downtime and enabling proactive maintenance.
High Performance: Delivers high-accuracy, isolated measurements with excellent noise immunity, meeting the demands of critical process control applications.
Application Areas
The Emerson A6428R, paired with appropriate AI CHARMs, is used across all process industries employing the DeltaV S-series DCS for analog signal acquisition.
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Oil & Gas and Refining: Connecting pressure, flow, level, and temperature transmitters for tank farms, pipelines, reactors, and fractionation columns.
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Chemical and Pharmaceutical: Acquiring data from reactor temperatures (TC/RTD), pH sensors, and analytical instrument signals for batch and continuous process control.
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Power Generation: Monitoring boiler temperatures, steam pressure, feedwater flow, and generator winding temperatures.
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Water and Wastewater Treatment: Interfacing with level gauges, turbidity meters, pH meters, and flow meters for pump stations, filters, and chemical feed systems.
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Food and Beverage: Controlling processes by monitoring vessel temperature, pressure, and ingredient flow rates.
Related Products
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CHARM I/O Card (CIOC) Carrier: The CIOC-4 or CIOC-8 carrier that provides power, backplane, and mounting for the A6428R card and CHARM modules.
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AI CHARM Modules: The signal conditioning modules that define the input type, such as:
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AI 4-20mA HART CHARM
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AI RTD CHARM (e.g., for Pt100)
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AI TC CHARM (e.g., for J, K type thermocouples)These plug into the CIOC carrier and communicate with the A6428R.
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DeltaV S-series Controller: The controller (e.g., DeltaV S-series controller) that processes the data from the A6428R.
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DeltaV System Software: DeltaV Engineering software for hardware configuration, control strategy programming, and CHARM channel configuration.
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Power Supply: The DeltaV S-series system power supply that powers the CIOC carrier and all its components.
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