ABB 3BHE021951R0124 (KV C758 A124)

PLC/DCS Module for Chemical Industry

Product Overview

ABB 3BHE021951R0124 (KV C758 A124) is a high-performance dual-channel analog I/O module, fully compatible with ABB S800 I/O, Symphony Plus and Advant 800xA automation platforms. It is specially engineered for chemical, petrochemical, refining and pharmaceutical industries. The module performs high-accuracy signal acquisition, closed-loop process control, equipment interlocking and data transmission, delivering reliable operation under corrosive, humid and high-interference working conditions.

Key Features

1. High Precision Signal Processing Equipped with 16-bit resolution, the module provides measuring accuracy up to ±0.1% FS. It supports standard industrial analog signals including 4–20 mA and 0–10 V. The dual-channel design enables redundant signal collection and parallel loop control for critical production units.
2. Excellent Adaptability to Harsh Environments Operating temperature range: -25°C to +70°C. With conformal coating on circuit boards, it effectively resists chemical vapor, dust and moisture. Compliant with IEC 61000 EMC standards, it offers strong anti-interference capability against motors and frequency converters on site.
3. High Safety & Easy Maintenance Supporting hot swapping, the module can be replaced without system shutdown to guarantee 24/7 continuous production. It adopts redundant 24 VDC power supply, with built-in overvoltage, overcurrent and overheating protection. It is applicable to safety interlock circuits in hazardous chemical areas.
4. Wide Compatibility & Flexible Communication It supports mainstream industrial protocols: Profibus DP, Modbus TCP/RTU and OPC UA. Seamless connection with ABB DCS/PLC systems and third-party SCADA, MES systems realizes plant-wide data interconnection.

Typical Applications

• Precise temperature, pressure and flow control for chemical reactors
• Level, flow monitoring and valve sequence control for distillation systems
• Signal collection and interlock control in explosive and corrosive hazardous zones
• Automation management of circulating water, boiler and wastewater treatment systems
• Real-time operational parameter monitoring for pumps and compressors

Technical Specifications

• Part Number: 3BHE021951R0124
• Model: KV C758 A124
• Power Supply: 24 VDC ±20%, redundant power
• Signal Type: Dual-channel analog (4–20 mA / 0–10 V)
• Resolution: 16 bit
• Accuracy: ±0.1% FS
• Operating Temperature: -25°C ~ +70°C
• Relative Humidity: 5% ~ 95%, non-condensing
• Protection Class: IP20
• Mounting: Plug-in type for standard rack / DIN rail
• Communication Protocols: Profibus DP, Modbus TCP/RTU, OPC UA

Product Advantages

• High measurement accuracy stabilizes production processes and improves product quality.
• Anti-corrosion and wide-temperature design extends service life in tough industrial environments.
• Hot-swap function minimizes downtime and enhances operational efficiency.
• Good system compatibility lowers the cost of equipment upgrade and reconstruction.
• Comprehensive protection and safety design reduce operational risks for chemical production.

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Short Version (for Catalog & Bidding Document)

ABB 3BHE021951R0124 is a dual-channel analog I/O module for ABB DCS and PLC systems. Featuring 16-bit high precision, anti-corrosion coating and strong EMC performance, it is ideal for chemical and petrochemical processes. Hot swap and multiple protection functions ensure stable 24-hour operation in harsh and hazardous working areas.