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Help CenterABB L003748-AR 3BSX108237R300 Voltage Regulation Module
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I. Product Positioning
ABB L003748-AR (Order No.: 3BSX108237R300) is a multifunctional industrial control and voltage regulation module integrating high-precision signal detection technology and adaptive control algorithms. It complies strictly with international power standards including IEC 61850 and IEC 61000.
It is mainly used for control, monitoring and voltage regulation in industrial automation systems, acting as a stable signal and control bridge for master control systems such as PLC and DCS. It adapts to complex operating scenarios in power, chemical, transportation and other industries, with the core goal of providing customers with efficient, stable and safe automation and voltage regulation solutions.
II. Technical Parameters
| Item | Specification |
|---|---|
| Type | L003748-AR |
| Order No. | 3BSX108237R300 |
| Module Type | Industrial control & voltage regulation module (including signal processing and programmable control functions) |
| Signal Input | 4 configurable analog inputs (0/4–20 mA, 0–10 V selectable), capable of acquiring voltage, current and other types of signals |
| Signal Output | 2 analog outputs (4–20 mA), 2 programmable digital outputs for control command output |
| Measuring Accuracy | ±0.2% FS (Full Scale) |
| Response Time | ≤15 ms (typical), fast response to load and voltage changes |
| Supply Voltage | 24 VDC (operating range: 18–36 VDC), power consumption ≤5 W |
| Communication Interface | RS-485 (Modbus RTU), Ethernet; supports Auto-IP plug-and-play; bidirectional communication with PLC/DCS; compatible with Ethernet switches |
| Protection Class | IP20 (DIN rail mounting, suitable for installation in control cabinets) |
| Operating Temperature | -10°C to +60°C (operating); -25°C to +70°C (storage), suitable for harsh industrial environments |
| Mounting | Standard 35 mm DIN rail mounting, easy installation, space-saving in control cabinets |
| Dimensions (approx.) | 120 mm × 80 mm × 60 mm (L×W×H) |
| Immunity | Complies with EN 55011 / EN 55022; resistant to EMI and EMC, suitable for complex interference environments in power systems |
| Key Features | Programmable control, high-precision voltage regulation, Auto-IP plug-and-play, comprehensive fault diagnosis, supports multiple control modes and communication protocols |
III. Core Functions
1. Multi-type Signal Processing & Voltage Regulation Control
The module flexibly acquires various analog signals from industrial sites (e.g. 4–20 mA current, 0–10 V voltage from sensors and transmitters), covering key parameters such as voltage, current and load. Internal signal conditioning circuits perform amplification, filtering and isolation to effectively suppress electromagnetic interference and ensure stable and accurate signal transmission.
Built-in adaptive voltage regulation algorithm enables precise voltage control. Based on measured voltage and load data, it automatically calculates the optimal control strategy, drives actuators to perform voltage regulation, and maintains stable voltage within the preset range to meet dynamic load changes in power systems.
2. Programmable Control & Signal Transmission
With programmable capability, it realizes precise control of industrial processes and machinery via programming, adapting to various application scenarios with high data throughput and fast response. It also performs bidirectional conversion between analog signals and standard control signals, forming a signal bridge between field devices and control systems for accurate command delivery and real-time status feedback.
Via RS-485 and Ethernet, it supports seamless integration with PLC/DCS systems such as ABB AC 800M and 800xA. The Auto-IP function automatically assigns a fixed IP address for plug-and-play operation, reducing downtime and configuration errors, and facilitating centralized management, remote monitoring and parameter adjustment.
3. Fault Diagnosis & Safety Protection
Comprehensive self-diagnosis function continuously monitors power supply, I/O signals, communication status and module health. In case of abnormal signals, unstable power, communication loss or other faults, it triggers alarms via digital outputs and logs fault information for quick troubleshooting.
It features overcurrent and overvoltage protection to safeguard the module, connected field devices and control systems against damage caused by abnormal voltage or current. High security level protects industrial processes and machinery from external interference and attacks, improving system reliability.
4. Easy Installation & Maintenance
Standard DIN rail mounting, compact size and easy integration into control cabinets save space. Remote diagnosis and maintenance are supported to reduce on-site workload.
It supports both local keypad and PC software commissioning. Signal calibration, parameter configuration and fault query can be completed without complex operations. Auto-IP further simplifies installation and replacement, lowering commissioning and maintenance costs.
IV. Applications
As a key control unit in industrial automation and power systems, the module is widely used in many fields requiring high control accuracy and voltage stability, including:
Power systems: On-load tap-changer control for substation transformers, voltage regulation for distributed PV grid-connected systems, voltage compensation device control in distribution networks, for automation, monitoring and protection.
Industrial automation: Voltage stabilization in steel, chemical and other industrial plants, process control and machine control for production lines, suitable for impact load conditions to ensure stable operation of precision equipment.
Robotics & discrete automation: Robot controller for automotive manufacturing, electronics, packaging, logistics and other industries to realize automated and intelligent production.
Transportation & infrastructure: Signal control, monitoring and data transmission for railway and transportation systems.
Other fields: Signal processing in optical fiber communication networks, data transmission in medical equipment, internal data transmission and communication in aerospace vehicles.
V. Product Advantages
High precision & adaptability: ±0.2% FS measuring accuracy, fast response, adaptive control algorithm, accurate capture of field signals and voltage variations, compliant with international power standards.
High reliability & security: Wide operating temperature range, anti-interference design, overcurrent/overvoltage protection, suitable for harsh environments; security features against external interference and attacks.
Flexible, convenient & efficient: Supports multi-type I/O, multiple protocols and control modes, compatible with mainstream PLC/DCS; Auto-IP simplifies installation; programmable for diversified applications.
Easy operation & maintenance: DIN rail mounting, multiple commissioning methods, complete fault diagnosis and remote maintenance, reducing installation, commissioning and maintenance costs.
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