Delta DVP04PT-H2 EH3 4-channel PT100 Temperature Control Module

The Delta DVP04PT-H2 EH3 is a specialized 4-channel PT100 temperature control module designed for high-precision industrial automation applications. This module boasts exceptional accuracy and rapid response times, crucial for maintaining tight process tolerances in demanding environments. Its robust design ensures reliability, while its compatibility with Delta's DVP series PLCs offers seamless integration into existing automation architectures. Key technical specifications include its four independent PT100 input channels, a high resolution of 16-bit, and an isolation voltage of 2500 VDC, underscoring its suitability for critical temperature monitoring and control tasks.

Product Specifications

| Feature                     | Specification                                      |

| :-------------------------- | :------------------------------------------------- |

| Model                       | DVP04PT-H2 EH3                                     |

| Input Channels              | 4-channel PT100                                    |

| Input Signal Type           | PT100 (3-wire or 2-wire)                           |

| Measurement Range           | -200°C to 850°C (dependent on configuration)       |

| Resolution                  | 16-bit                                             |

| Accuracy                    | ±0.5°C (typical, PT100)                            |

| Sampling Time               | < 200 ms                                           |

| Isolation Voltage           | 2500 VDC (between I/O and power)                   |

| Power Consumption           | < 1W                                               |

| Operating Temperature       | 0°C to 50°C                                        |

| Storage Temperature         | -20°C to 70°C                                      |

| Dimensions (W x H x D)      | 79.4mm x 90mm x 60mm                               |

| Mounting                    | DIN rail                                           |

Core Features & Market Positioning

The Delta DVP04PT-H2 EH3 distinguishes itself in the competitive industrial temperature control market through its high-density, multi-channel PT100 input capability coupled with Delta's reputation for reliable and cost-effective automation solutions. Its EH3 designation typically signifies enhanced features or performance within the DVP series, suggesting superior processing power or advanced diagnostic capabilities compared to standard modules. The module’s precise measurement and fast sampling rate make it ideal for applications where minute temperature fluctuations must be detected and reacted to swiftly, positioning it as a valuable component for process optimization and quality assurance in industries like chemical processing, food and beverage, and pharmaceuticals. The inherent isolation provides robust protection against electrical noise and ground loops, critical for stable operation in electrically challenging industrial settings.

Key Application Scenarios

This 4-channel PT100 module is particularly well-suited for advanced temperature monitoring and control systems requiring simultaneous input from multiple sensors. Common scenarios include multi-zone heating or cooling systems in ovens and furnaces, where precise temperature profiles must be maintained across different areas. It is also extensively used in sophisticated process control loops for reactors, distillation columns, and pasteurization equipment, where accurate temperature data is paramount for product quality and safety. Furthermore, its application extends to environmental monitoring systems in clean rooms or laboratories, ensuring consistent atmospheric conditions. The ability to interface directly with PT100 sensors, a widely adopted standard for industrial temperature measurement, broadens its applicability across diverse manufacturing and research environments.

Practical System Integration Guidance

Integrating the Delta DVP04PT-H2 EH3 into a DVP series PLC system is straightforward. The module connects to the PLC's local expansion bus. For wiring, ensure proper grounding and correct connection of the PT100 sensors (3-wire or 2-wire configuration as per the specific application) to the module's terminals. Utilizing shielded twisted-pair cables for sensor wiring is highly recommended to minimize electromagnetic interference. When configuring the module within the PLC programming software (e.g., Delta's WPLSoft), you will typically assign input addresses for each of the four channels and configure sensor type (PT100), unit of measurement (°C or °F), and compensation settings for lead wire resistance if using 2-wire mode or for improved accuracy in 3-wire mode. The module's diagnostic functions can be accessed through specific PLC instructions, allowing for real-time status monitoring and fault detection.

Operation and Risk Mitigation

Proper operation of the Delta DVP04PT-H2 EH3 hinges on adhering to the specified environmental conditions and power supply requirements. Avoid exposing the module to excessive vibration, humidity, or extreme temperatures outside its operational range. During installation, ensure adequate ventilation to prevent overheating, as temperature control modules can generate heat during operation. Fault codes, if present, are typically communicated through the PLC's status registers or diagnostic flags. Common issues may relate to sensor open circuits, short circuits, or incorrect sensor type configuration. Always refer to the official Delta DVP-04PT-H2 EH3 user manual for a comprehensive list of error codes and detailed troubleshooting steps. Implementing robust wiring practices and using surge protection on the power supply can mitigate potential risks and ensure long-term reliability.

Scalability & Long-Term Value

The Delta DVP04PT-H2 EH3 module offers excellent scalability within the Delta DVP ecosystem. Its modular design allows for easy expansion of I/O capabilities by adding more modules to the PLC's local or remote expansion bus, enabling systems to grow with evolving production demands. Compatibility with Delta's DVP series PLCs ensures that this module can be seamlessly integrated into existing or future automation projects, preserving investment in Delta hardware and software. As industries increasingly adopt Industrial IoT (IIoT) and Industry 4.0 principles, the data generated by this temperature module can be readily integrated into higher-level SCADA systems or cloud platforms for advanced analytics, predictive maintenance, and remote monitoring, thereby enhancing long-term operational efficiency and value.

Frequently Asked Questions

1. What is the Delta DVP04PT-H2 EH3 module used for?

This module is used for high-precision temperature monitoring and control in industrial automation. It features four independent PT100 input channels.

It is ideal for applications requiring accurate temperature data from multiple points simultaneously. The module integrates seamlessly with Delta DVP series PLCs for sophisticated process control.

Its precise measurement capabilities ensure optimal performance in demanding environments like chemical processing and HVAC systems.

2. How do I wire a PT100 sensor to the DVP04PT-H2 EH3?

Connect the PT100 sensor using either 3-wire or 2-wire configuration to the designated terminals. Ensure correct polarity for 2-wire sensors.

For 3-wire connections, connect the three leads of the PT100 to the corresponding terminals (e.g., L+, L-, and a third lead). This method compensates for lead wire resistance.

Always use shielded, twisted-pair cables for sensor connections to minimize electrical noise and maintain signal integrity.

3. What is the accuracy of the Delta DVP04PT-H2 EH3 module?

The module typically offers an accuracy of ±0.5°C for PT100 sensors. This level of precision is critical for sensitive industrial processes.

This accuracy is maintained across its specified operating temperature range, ensuring reliable readings. External factors like sensor quality and wiring can also influence overall accuracy.

The high 16-bit resolution further enhances the module's ability to detect subtle temperature variations.

4. Can I use this module with sensors other than PT100?

No, the Delta DVP04PT-H2 EH3 is specifically designed for PT100 resistance temperature detectors. It cannot directly interface with thermocouples or other sensor types.

The module's internal circuitry and firmware are calibrated for the resistance characteristics of PT100 sensors. Attempting to use other sensors will result in incorrect readings or no readings.

If your application requires different sensor types, you would need to use a different module or signal conditioner.

5. What is the sampling time for the DVP04PT-H2 EH3?

The sampling time for this module is less than 200 milliseconds. This rapid sampling rate is crucial for real-time control applications.

A fast sampling time allows the PLC to react quickly to temperature changes, enabling tighter process control and improved product consistency.

This speed makes the module suitable for dynamic processes where temperature fluctuations need immediate detection and correction.

6. Does the DVP04PT-H2 EH3 provide isolation?

Yes, the module provides 2500 VDC isolation between the I/O signals and the power supply. This isolation is vital in industrial environments.

Isolation protects the PLC and other connected devices from voltage surges, ground loops, and electrical noise. It enhances system reliability and operator safety.

This feature is particularly important when connecting sensors in environments with high electrical interference.

7. How do I configure the module in Delta's WPLSoft software?

In WPLSoft, you will typically add the module to the PLC's hardware configuration. Then, you can access its parameters for input type (PT100), units, and lead wire compensation.

Assign specific I/O addresses within the PLC program to read temperature values from each of the four channels. These addresses will correspond to the module's data registers.

Online diagnostics within the software allow you to monitor the module's status and sensor readings in real-time.

8. What are the environmental operating conditions for this module?

The module operates within a temperature range of 0°C to 50°C and should be protected from excessive humidity. It is designed for standard industrial environments.

Avoid exposing the module to direct sunlight, corrosive gases, or dust, as these can degrade performance and lifespan. Proper enclosure and ventilation are recommended.

Ensure the power supply is stable and within the specified voltage range to prevent operational issues.

9. Can I use this module for 2-wire or 3-wire PT100 sensors?

Yes, the DVP04PT-H2 EH3 supports both 2-wire and 3-wire PT100 configurations. The configuration is selected during software setup.

The 3-wire configuration is recommended for better accuracy as it automatically compensates for the resistance of the extension wires. The 2-wire configuration is simpler but may be less accurate over long cable runs.

Refer to the module's manual for specific terminal assignments for each wiring type.

10. How does this module contribute to Industry 4.0 integration?

The module generates precise temperature data that can be fed into SCADA or MES systems. This data is crucial for real-time monitoring and historical trending.

Integration with IIoT platforms enables remote diagnostics, predictive maintenance scheduling, and energy management based on temperature profiles.

By providing accurate sensor data, it forms a foundational element for smart manufacturing initiatives, optimizing processes and improving overall equipment effectiveness (OEE).