Serving as a "bridge" between the main controller and peripheral devices, this daughter board integrates three core functions: multi-type signal conversion, high-speed data routing, and distributed control collaboration. It enables accurate signal interaction and synchronous control among sensors, actuators, and the main controller, significantly improving the signal processing efficiency and control flexibility of industrial systems.

Adopting a modular and low-power design, it features a compact size and supports hot-swapping. This allows flexible expansion of the main controller's interface capabilities and control range. Widely used in complex automation scenarios in industries like power, chemical engineering, and metallurgy, it is a key component for realizing the "distributed control and centralized management" of industrial systems.

Core Features and Advantages

1. Efficient Conversion and Adaptation of Multi-Type Signals

• Full Signal Compatibility: Supports the acquisition and conversion of analog signals (4-20mA/0-10V DC), digital signals (DI/DO dry contacts/wet contacts), and pulse signals (0-1kHz speed/flow signals), adapting to more than 90% of sensor and actuator signal types in industrial fields.
• High-Precision Signal Conditioning: Built-in 16-bit ADC (Analog-to-Digital Conversion) and 14-bit DAC (Digital-to-Analog Conversion). The analog signal acquisition accuracy reaches ±0.05% FS, and the digital signal response time is ＜0.5ms, effectively suppressing signal noise and interference.
• Flexible Signal Range Configuration: The input/output range of analog signals (e.g., 0-5V, 1-5V, 4-20mA) can be customized via software without replacing hardware, adapting to peripheral devices of different brands and specifications.
• Differential Signal Processing: Analog channels adopt a differential input design with a Common Mode Rejection Ratio (CMRR) ＞80dB, which can effectively offset common-mode interference in long-distance transmission. The maximum signal transmission distance supports 1000m (shielded twisted pair).

2. High-Speed Data Routing and Collaborative Control

• High-Performance Data Processing Core: Equipped with a 32-bit ARM Cortex-M4 processor with an operating rate of 120 MIPS, supporting multi-channel parallel signal processing. The data forwarding delay is ＜1ms, meeting real-time control requirements.
• Multi-Protocol Communication Support:
• High-Speed Bus: Integrates 1 channel of ABB dedicated backplane bus (transmission rate 100Mbps) to achieve seamless data interaction with the main controller.
• Industrial Ethernet: 1 channel of 10/100Mbps Ethernet, supporting Modbus TCP/IP and EtherNet/IP protocols for connecting to upper-level monitoring systems.
• Fieldbus: 2 channels of RS485 (supporting Modbus RTU) for connecting distributed I/O modules or intelligent sensors.
• Distributed Collaborative Control: Supports the three-level control architecture of "main controller - daughter board - peripheral devices", and can locally execute simple control logic (such as interlock protection and threshold alarm), reducing the load of the main controller and improving the system response speed.

3. High Reliability and Flexible Expandability

• Industrial-Grade Stability Design: Uses wide-temperature components (-40℃~+85℃), and the PCB board complies with the IPC-6012 industrial standard. It has moisture-proof, anti-corrosion, and anti-vibration capabilities, with a Mean Time Between Failures (MTBF) ＞600,000 hours (under 40℃ working condition).
• Hot-Swapping and Redundancy Support: Complies with ABB standard hot-swapping specifications, no need to shut down the system during maintenance; key communication channels (such as backplane bus and power supply) support 1+1 redundancy configuration, and a single-point fault will not affect system operation.
• Modular Expansion Capability: Signal conditioning modules, relay output modules, isolation modules, etc., can be connected through the daughter board expansion interface. It supports cascading of up to 8 expansion modules, flexibly expanding the number of signal channels (maximum expansion to 64 channels of AI and 128 channels of DI/DO).
• Comprehensive Protection Functions: Built-in power overvoltage (36V DC) and overcurrent (1A) protection, signal channel short-circuit protection, and board overheating (＞75℃) load reduction protection to prevent fault spread to the main controller or peripheral devices.

4. Convenient Installation and Operation & Maintenance

• Compact Size and Standardized Installation: With a size of only 80mm×60mm×25mm (width × height × depth), it adopts a snap-on installation method, adapting to the dedicated daughter board slot of the main controller or 35mm DIN rail (with an adapter bracket required), saving installation space.
• Intuitive Status Monitoring: 8 on-board LED indicators display power supply, communication, signal status, and fault alarm information in real time, allowing on-site personnel to quickly judge the operating status of the daughter board.
• User-Friendly Debugging Tools: Compatible with ABB Control Builder M and Symphony Plus Engineer software, supporting online parameter configuration, signal simulation, and fault diagnosis, reducing the debugging cycle by more than 30%.

Technical Specifications

Application Scenarios

With its flexible signal adaptation and collaborative control capabilities, the ABB UFD402A101 3BHE034872R0101 Control Hub Daughter Board is widely used in industrial scenarios requiring distributed signal processing:

• Power Industry: Distributed I/O signal acquisition and local control for auxiliary systems of thermal power plants (such as coal mills and feedwater pumps), and signal transfer for secondary equipment in substations.
• Chemical Industry: Signal conditioning and interlock control for sensors (temperature, pressure, liquid level) around reaction kettles, reducing the data processing load of the main controller.
• Metallurgical Industry: Signal aggregation from distributed detection points (such as roll gap and tension sensors) in rolling mill production lines, and collaborative work with the main controller to achieve precise speed regulation.
• Oil and Gas Industry: Signal conversion for decentralized instruments (pressure transmitters, flowmeters) on oil drilling platforms, with data uploaded to the SCADA system via Ethernet.

• Water Treatment Industry: I/O expansion for various process sections (aeration, sedimentation, filtration) in sewage treatment plants, enabling linkage between local alarms and remote monitoring.

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