The RELIANCE WR-D4004 is an industrial-grade controller module belonging to the PSC 4000 series. It is mainly used for signal processing, equipment control and data interaction in industrial automation systems, and features adaptability to multiple scenarios as well as high reliability. Its modular architecture allows flexible integration into DCS systems, production line control units and motor drive equipment, making it a key component for achieving precise control in fields such as manufacturing, energy and chemical engineering.

Core Technical Parameters and Functional Highlights

1. Hardware Performance and Interface Configuration

Processor and Storage

It is equipped with a 32-bit RISC CPU, which delivers strong computing power and fast response speed. It has 128KB RAM for operation and 2MB storage space, capable of supporting complex control algorithms and logic programs.

I/O Channel Capability

• Digital I/O: 4 channels of digital input (supporting dry contacts, wet contacts, NPN/PNP sensors) + 4 channels of digital output (relay/transistor output optional).
• Analog I/O (for some models): 16 channels of analog input + 16 channels of analog output. It supports 0-10V voltage signals, 4-20mA current signals and 20mA reverse-phase signals, and is compatible with front-end devices such as sensors and transmitters.

Communication Interface

It supports RS-232/485 (serial port) and CAN bus, and is compatible with protocols like Modbus and CANopen, enabling data interaction with PLCs, HMIs and upper computers.

Power Supply and Protection

• Wide Voltage Adaptation: The control unit uses 24VDC, and the power module supports 90-264VAC input.
• Protection Level: IP20 (dust-proof). Some models can withstand high temperatures up to +300℃ for a short time, adapting to industrial on-site environments with dust and temperature differences.
• Safety Certification: It complies with the IEC61131-3 control standard, EMC Directive 2014/30/EU (electromagnetic interference resistance), and meets the SIL 2 safety integrity level (for some models).

2. Core Control Functions

Multi-Scenario Control Modes

• Motor Control: When used as a frequency converter module, it can accurately control the speed, torque, start and stop of AC motors. The power range covers 0.75kW-2.2kW, and it supports 3-phase 380V input/output.
• Process Control: It supports control modes such as PID, proportional and integral. It can process process parameters like temperature, pressure and flow, realizing stable regulation of industrial processes.
• Safety Protection: It has built-in overcurrent, overvoltage and undervoltage protection functions to prevent equipment damage caused by power abnormalities and ensure continuous system operation.

Environmental Adaptability

• Operating Temperature: -40℃~85℃ (wide-temperature models), -10℃~50℃ (regular models).
• Storage Temperature: -25℃~70℃.
• Anti-Interference Capability: With EMC certification, it can work stably in strong electromagnetic environments (such as factory workshops and power plants).

3. Physical Specifications and Installation

Dimensions and Weight

• Regular dimensions: 90mm×60mm×25mm (compact type), 172.7mm×114.3mm×60.35mm (extended I/O models).
• Weight: 200g-1.5kg. It is compatible with standard industrial cabinets.

Installation Method

With a modular design, it supports DIN rail installation or panel installation. No complex tools are required, facilitating integration and later maintenance.

Application Fields

The RELIANCE WR-D4004 is widely used in various industrial scenarios:
Manufacturing Automation: It is applied to production line control in automobile manufacturing, electronic processing and food processing. It is responsible for equipment start/stop, speed adjustment and process parameter monitoring, improving production efficiency and product quality stability.
Energy and Power: It is used for energy transmission control in power plants and power grid systems. Combined with devices such as anemometers (supporting wind speed measurement of 0-75m/s with an accuracy of 2%), it realizes precise management of energy production and distribution.
Chemical Industry and Water Treatment: It enables chemical reaction process control (e.g., mixing, separation) and water quality monitoring & treatment automation. It collects key parameters through analog I/O to ensure production safety and water quality compliance.
Machinery and Transportation: It is used for motion control of machine tools and textile machinery, as well as logic control of railway/transportation signals. It supports adaptation to multiple motor types to meet the driving needs of different devices.
Special Scenarios: It is suitable for object detection in hazardous (explosive, radioactive) and narrow areas. It can be used as a spare part for DCS systems to fill the hardware gap in industrial control.

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