Integrating an advanced hardware architecture and intelligent software algorithms, this module can operate as a standalone control unit or connect with multiple modules via an Ethernet switch to achieve multi-zone coordinated control. It accurately executes complex control logic and data processing tasks while adapting to harsh industrial environments. Widely used in power, metallurgy, chemical and other industries, it provides core support for stable equipment operation, efficiency optimization and pollutant emission control.Its modular design not only facilitates installation, maintenance and expansion, but also enables flexible adaptation to various industrial control systems according to the requirements of different application scenarios, embodying Alstom’s strong technological capabilities in the field of industrial automation.

Technical Specifications

• Power Parameters: Input voltage supports 24V DC (some configurations are compatible with AC24V ±5%); certain models can adapt to a wide voltage range of 110V–220V. Output voltage is 0–10V DC, with other output ranges customizable on request. Rated power can reach up to 4kW, and current ratings cover 4A to 18A to meet various load requirements.
• Environmental Adaptability: Operating temperature range is -40℃ to +85℃, with some models rated at -20℃ to +60℃. Storage temperature ranges from -30℃ to +80℃, enabling operation in extreme industrial environments including high and low temperatures. Ingress protection reaches up to IP65, providing excellent dustproof and moisture‑proof performance. The unit also withstands vibration and electrical noise, ensuring stable operation under harsh conditions.
• Hardware Configuration: Equipped with a 16-bit microprocessor and advanced digital signal processing technology for efficient execution of control tasks and data operations. Integrates analog input/output and digital input/output interfaces with input signal ranges of 0–20mA / 0–10V and matching output signal ranges, allowing flexible connection to sensors, actuators and other devices. Built-in SCR trigger circuit, non-volatile EEPROM (battery-free), Flash memory (for control software storage) and real-time clock with capacitive backup (battery-free) guarantee secure data storage and reliable equipment operation.
• Communication Interfaces: Supports multiple communication protocols and interfaces including RS-485, Modbus and Profibus. Selected models integrate an Ethernet interface and Web server, enabling remote monitoring, parameter configuration and data exchange via a PC Web browser or dedicated PC-MTU software for convenient system integration and management.
• Physical Specifications: Compact design with typical dimensions of 100mm × 50mm × 25mm or 120mm × 80mm × 50mm (varies by model). Weight ranges from approximately 1.5kg. Supports wall mounting or cabinet mounting. All terminals use plug-in connectors, allowing maintenance without disconnecting all wiring for improved efficiency.

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• Functional Features

• Intelligent Control Function

• As the core component of the EPIC III electrostatic precipitator control system, this module provides powerful intelligent control capabilities, enabling precise regulation of the input power supply for electrostatic precipitators. When process conditions such as gas temperature, dust composition, and gas flow direction change significantly, it automatically maintains the spark rate within an appropriate range and adjusts rectifier parameters in real time to ensure stable ESP efficiency.It supports six preset operating modes, each with 11 configurable parameters, allowing fast switching according to variations in boiler load and other operating conditions without manual readjustment, greatly improving operational convenience.Equipped with the built-in EPOQ (ESP Optimal Q Algorithm), it automatically selects the optimal intermittent power supply ratio and measured ESP current values, achieving maximum dust collection efficiency under varying load conditions and helping enterprises meet emission targets.

• High Reliability & Protection Functions

• Constructed from high-quality materials with advanced design techniques, the module delivers exceptional reliability and stability, supporting long-term continuous operation and reducing unplanned downtime.It features comprehensive built-in protection mechanisms, including overload protection, short-circuit protection, overcurrent protection, overvoltage protection, undervoltage protection, and overheating protection. These functions detect system anomalies promptly and trigger alarms or tripping to prevent equipment damage, ensuring safe and stable operation of the entire control system.LED indicators (including POWER, ALARM, SPARK, etc.) provide real-time display of operating status, alarm messages, and fault prompts, enabling on-site personnel to quickly troubleshoot and locate faults.

• Flexible Configuration & Scalability

• Featuring a compact, modular design, the module can operate as a standalone unit. A single EP3‑E‑4‑A module controls one power supply section of an electrostatic precipitator. Multiple modules connected via an Ethernet switch enable coordinated control across multiple ESP power sections, satisfying the control requirements of large-scale systems.It supports programmable logic control, allowing users to customize control logic and algorithms to meet the specific demands of different industrial applications.With a variety of I/O interfaces and communication protocols, it can flexibly connect to sensors, actuators, motors, and other control devices, facilitating system integration and expansion to adapt to control architectures across various industries.

• Convenient Monitoring & Maintenance Functions

• The module supports remote monitoring and fault diagnosis. Personnel can monitor operating parameters and alarm status in real time via a web browser, PC‑MTU software, or FD_Ctrl device, and perform remote parameter configuration and alarm reset, reducing on-site maintenance costs and improving efficiency.A built-in alarm log stores the latest ten alarm events (since power‑on), including warning alarms and trip alarms, supporting fault cause analysis and system parameter optimization.It provides ESP master control functionality: one EP3‑E‑4‑A configured as the master unit can control all modules within a specified address range on the Ethernet system, enabling batch parameter modification and global reset to simplify system management. It also supports parameter copy functions in PC‑MTU software, allowing quick replication of settings from the master module to slave modules for enhanced configuration efficiency.

Application Areas

• Power Industry: Primarily used in electrostatic precipitator (ESP) control systems in power plants to optimize flue gas purification efficiency and reduce dust pollutant emissions. It is also applied in the control and monitoring of generators, transformers, switchyards and other equipment, ensuring stable operation of the power system and improving power generation efficiency.
• Metallurgical Industry: Used in process control for steelmaking and other metallurgical production, including equipment control, parameter regulation, and dust emission control. It helps metallurgical enterprises achieve efficient and environmentally friendly production while lowering energy consumption and pollutant emissions.
• Chemical Industry: Provides precise control for chemical reactors and production processes, as well as for equipment related to dust and waste gas treatment in chemical production. It ensures stable production flow, improves product quality, and meets environmental emission standards.
• Manufacturing Industry: Compatible with automated production lines, it is used for control, process scheduling and data acquisition of various mechanical equipment, reducing manual intervention, improving production efficiency and precision, and enabling automated and intelligent operation of production lines.
• Other Fields: Also applied in rail transit (speed control and brake management in train control systems), water treatment (control and management of pumps, valves, filters and other equipment), and other areas, providing reliable control support for a wide range of industrial automation systems.

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