ABB 129740-002 Replacement SIO Assembly for ABB DCS Racks

The ABB 129740-002 Replacement SIO Assembly for ABB DCS Racks is a Smart I/O (SIO) assembly board for legacy ABB automation systems, providing intelligent signal processing and I/O interfacing for measurement and control applications . It is associated with ABB's Advant Controller 400 series PLC environment, where it receives, processes and transmits analog signals from field sensors. As a pre-processor-style I/O board, it conditions sensor signals before they reach the controller, supporting reliable data acquisition under industrial site conditions.

Key Specifications:

• Brand: ABB
• Model: 129740-002
• Type: SIO Assembly (Smart I/O)
• System Association: ABB Advant Controller 400 series
• Function: Intelligent signal processing and I/O interface for measurement/control
• Signal Input: Analog sensor signals, e.g. 0–30 V DC range 
• Power Supply: 24 V DC, 20.4–28.8 V DC range, max 10 A

ABB 129740-002 Replacement SIO Assembly for ABB DCS Racks is the smart I/O board that sits between field sensors and the ABB controller: it receives analog signals, processes them with filtering and signal conditioning, and hands clean data to the control system — reducing the processing load on the controller itself.

  Xingchuang Ronghe (Fuzhou) Electrical Equipment Co., Ltd. is dedicated to delivering high-quality electrical equipment solutions, backed by professional product supply capabilities and a comprehensive technical service system. We stay customer-centric, continuously optimizing product performance and service experience. If you have any needs, you are welcome to contact us at any time for consultation and discussion. We look forward to partnering with you to create value together!