ABB CI570 3BSE001440R1 System-Ready Masterfieldbus Controller for AC800M Architecture

ABB CI570 3BSE001440R1 System-Ready Masterfieldbus Controller for AC800M Architecture

The ABB CI570 (3BSE001440R1) is a dedicated Masterfieldbus Controller engineered for seamless integration within the AC800M distributed control system architecture. Designed to serve as the fieldbus master interface layer between the AC800M CPU module and field-level instrumentation networks, the CI570 enables deterministic, high-integrity communication across FOUNDATION Fieldbus H1 and PROFIBUS DP segments. In modern process automation environments — spanning oil and gas, power generation, chemical processing, water treatment, and advanced manufacturing — the CI570 plays a pivotal role in ensuring that the control layer, I/O layer, network layer, and field execution layer operate as a unified, coherent system rather than isolated subsystems.

Within a fully configured AC800M control cabinet, the CI570 mounts directly onto the TB820V2 or TB840A baseplate, sharing the internal S100 I/O bus with adjacent modules such as the AI810, AO810V2, DI810, and DO810 I/O modules. This tight physical and logical integration eliminates the need for external gateways in most fieldbus topologies, reducing latency, minimizing single points of failure, and simplifying the overall system bill of materials. The PM866 or PM891 CPU module coordinates all fieldbus scheduling and data exchange through the CI570, ensuring that cyclic and acyclic communication tasks are handled with the determinism required by safety-critical and process-critical applications.

From a network architecture perspective, the CI570 supports multi-segment fieldbus topologies, allowing engineers to distribute field devices — such as smart transmitters, positioners, and analyzers — across multiple H1 or DP segments while maintaining centralized supervision through the AC800M controller. This architecture is particularly valuable in large-scale installations where cable runs, hazardous area classifications, or device counts make single-segment designs impractical. The CI570’s ability to manage multiple fieldbus segments from a single module slot significantly reduces rack space requirements and simplifies the overall control panel layout.

Redundancy is a core design consideration for the CI570 in high-availability applications. When paired with a redundant PM891 CPU pair and a redundant CI570 configuration, the system achieves seamless bumpless transfer during controller switchover events, ensuring that fieldbus communication to critical field devices is never interrupted. This redundancy architecture is commonly deployed in refinery control systems, power plant DCS upgrades, and offshore platform automation projects where unplanned downtime carries significant operational and safety consequences. The CI570 also supports the use of the SD821 or SD822 power supply modules to provide redundant 24 VDC rail power to the S100 I/O bus, further strengthening overall system availability.

For engineering teams responsible for system commissioning and long-term maintenance, the CI570 integrates natively with ABB’s Control Builder M engineering environment. This allows fieldbus device descriptions (DD files) to be imported, device parameters to be configured online, and live diagnostics to be monitored without requiring separate fieldbus configuration tools. The result is a streamlined commissioning workflow that reduces project schedule risk and enables faster loop checkout. During ongoing plant operations, the CI570’s built-in diagnostic capabilities allow maintenance engineers to identify fieldbus segment faults, device communication errors, and wiring issues directly from the HMI layer — typically implemented using ABB’s System 800xA or a third-party SCADA platform connected via OPC DA/UA.

Inventory availability and supply chain continuity are critical considerations for any long-term automation project. ZYPLC maintains verified stock of the CI570 3BSE001440R1 to support both new system builds and brownfield replacement projects. All units are supplied with a 12-Month Warranty covering manufacturing defects and functional performance, giving procurement teams and plant engineers confidence in the reliability of their spare parts inventory strategy.

Architecture Specification Table

Coordinated Control System Design

The CI570 3BSE001440R1 does not operate in isolation — its value is fully realized when considered as part of a complete AC800M control system architecture. In a typical process control cabinet, the PM891 CPU module serves as the central processing unit, executing control strategies and managing all I/O communication. The CI570 occupies one or more module slots on the TB840A baseplate alongside analog input modules such as the AI810 and AI835A, analog output modules such as the AO810V2, and digital I/O modules including the DI810 and DO810. Together, these modules form the I/O layer that interfaces directly with field instruments, control valves, and motor starters.

At the network layer, the CI570 bridges the AC800M controller to FOUNDATION Fieldbus H1 segments or PROFIBUS DP networks where smart field devices — including Coriolis flow transmitters, pressure transmitters, and intelligent valve positioners — reside. For installations requiring Modbus TCP or EtherNet/IP connectivity to upstream SCADA or MES systems, the CI571 or CI572 communication interface modules can be deployed alongside the CI570 within the same rack, providing a multi-protocol network architecture from a single controller platform.

Power integrity across the control cabinet is maintained through the SD821 or SD822 redundant power supply modules, which deliver stable 24 VDC to the S100 I/O bus. At the human-machine interface layer, operators interact with the control system through ABB System 800xA workstations or panel-mounted HMI terminals, receiving real-time process data that flows from field devices through the CI570 to the PM891 CPU and ultimately to the display layer. This end-to-end signal flow — from field sensor through fieldbus, through the CI570, through the CPU, and up to the HMI — represents the complete contextual integration that defines a well-engineered AC800M system.

Application in Layered Automation Systems

The CI570 3BSE001440R1 is deployed across a wide range of industrial sectors where reliable fieldbus communication is essential to process integrity and operational efficiency.

In oil and gas processing and petrochemical plants, the CI570 manages FOUNDATION Fieldbus H1 segments connecting pressure, temperature, and flow transmitters in hazardous areas. Its support for intrinsically safe fieldbus topologies — when combined with appropriate fieldbus barriers and segment couplers — makes it suitable for Zone 1 and Zone 2 classified environments. In power generation facilities, including thermal, hydro, and combined-cycle plants, the CI570 is used within AC800M-based turbine control and balance-of-plant systems, where its redundancy capabilities ensure continuous operation during planned and unplanned maintenance events.

In water and wastewater treatment plants, the CI570 enables centralized control of distributed pump stations, dosing systems, and filtration processes over PROFIBUS DP networks, reducing the need for local control panels and simplifying remote monitoring. In mining and minerals processing operations, the CI570 supports the control of conveyor systems, crushers, and flotation circuits within AC800M-based plant-wide control architectures. In pharmaceutical and food and beverage manufacturing, the CI570’s deterministic communication and native integration with Control Builder M support the validation and audit trail requirements of regulated production environments.

Across all these applications, the CI570’s role as the fieldbus master ensures that the control system maintains full visibility and command authority over every connected field device, supporting both normal operations and emergency shutdown sequences with equal reliability.

Architecture Engineering FAQ

Q1: Is the CI570 3BSE001440R1 compatible with both PM866 and PM891 CPU modules in the AC800M system?
Yes. The CI570 is designed for use within the AC800M S100 I/O bus architecture and is compatible with both the PM866 and PM891 processor modules. It mounts on standard TB820V2 or TB840A baseplates and is configured through ABB Control Builder M, which supports all current AC800M CPU variants. For redundant controller configurations using dual PM891 modules, a redundant CI570 pair can be configured to ensure uninterrupted fieldbus communication during CPU switchover events.

Q2: Can the CI570 support both FOUNDATION Fieldbus H1 and PROFIBUS DP simultaneously, and how does this affect system architecture design?
The CI570 is a dedicated masterfieldbus controller that supports FOUNDATION Fieldbus H1 and PROFIBUS DP protocols depending on the specific firmware and configuration applied. In systems requiring simultaneous support for both protocols, multiple CI570 modules can be installed in the same rack — one configured for H1 and another for DP — allowing the AC800M controller to manage heterogeneous fieldbus networks from a single control platform. This approach is common in brownfield upgrades where existing PROFIBUS DP devices must coexist with newer FOUNDATION Fieldbus instruments.

Q3: What does the 12-Month Warranty cover, and how does ZYPLC support long-term spare parts availability for the CI570?
All CI570 3BSE001440R1 units supplied by ZYPLC are covered by a 12-Month Warranty against manufacturing defects and functional failures under normal operating conditions. ZYPLC maintains verified stock of the CI570 and related AC800M components to support both immediate replacement needs and long-term spare parts strategies for plant maintenance teams. For procurement inquiries, technical compatibility questions, or warranty claims, contact ZYPLC at +86 19859288691 or plc.sales@zyplc.com.

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