Delta AS04RTD-A 4-channel RTD Temperature Input Module

The Delta AS04RTD-A is a robust 4-channel RTD temperature input module designed for the AS Series PLC. This module offers high precision and versatile sensor compatibility, making it an excellent choice for industrial automation applications requiring accurate temperature monitoring. Key advantages include its support for a wide range of RTD sensors, rapid conversion times, and excellent resolution, ensuring reliable data acquisition in demanding environments.

Product Specifications

| Specification         | Value                                                                                                   |

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

| Model Name            | AS04RTD-A                                                                                               |

| Compatible Series     | AS Series                                                                                               |

| Classification        | Platinum Resistance Thermometer Module                                                                  |

| IO Channels           | 4                                                                                                       |

| Type                  | Basic                                                                                                   |

| Power Consumption     | 2W / 1W                                                                                                 |

| IP Rating             | IP20                                                                                                    |

| Sensor Types          | Pt100, Ni100, Pt1000, Ni1000, JPt100, LGNi1000, Cu50, Cu100, 0–300Ω, 0–3000Ω, Ni120                       |

| Resolution            | 0.1°C/0.1°F (16 bits)                                                                                   |

| Conversion Time       | 200 ms/channel                                                                                          |

| Input Configuration   | 2-wire/3-wire RTD                                                                                       |

| Operating Temperature | -20°C to 60°C                                                                                           |

| Mounting Type         | Chassis Mount, DIN Rail                                                                                 |

| Termination Style     | Pluggable Screw Terminal                                                                                |

| Accuracy              | ±0.1% (at ambient temperature of 25°C ±5°C)                                                    |

Core Features & Market Positioning

The Delta AS04RTD-A distinguishes itself in the industrial automation market through its comprehensive sensor support and high-fidelity data acquisition. It is designed to integrate seamlessly with Delta's AS Series PLC, offering a unified and efficient control solution. The module's ability to handle various RTD types, including Pt100, Ni100, and others, provides significant flexibility for engineers and system integrators. Its 16-bit resolution and 0.1°C/0.1°F precision enable granular temperature monitoring, crucial for processes demanding tight thermal control. The rapid 200 ms/channel conversion time ensures that real-time temperature fluctuations are captured effectively, positioning the AS04RTD-A as a competitive offering for applications where timely temperature data is paramount. Furthermore, its rugged construction and IP20 rating make it suitable for standard industrial environments.

Key Application Scenarios

The Delta AS04RTD-A finds application in a multitude of industrial sectors where precise temperature measurement is critical. It is an ideal solution for food and beverage processing, where maintaining specific temperatures during cooking, chilling, or fermentation is essential for product quality and safety. In manufacturing and assembly lines, it can monitor temperatures of machinery, processes, or environmental conditions to prevent overheating and ensure optimal operation. The chemical and pharmaceutical industries benefit from its accuracy in monitoring reaction temperatures or storage conditions, crucial for product efficacy and safety. Additionally, it is well-suited for HVAC systems, energy management, and general industrial automation where real-time temperature data is required for control and optimization. Its compatibility with diverse RTD sensors allows for adaptation to specific process requirements across these varied fields.

Practical System Integration Guidance

Integrating the Delta AS04RTD-A into an existing AS Series PLC system is straightforward, facilitated by its modular design and pluggable screw terminals. Installation typically involves mounting the module onto a standard DIN rail within the PLC enclosure. Wiring of the RTD sensors is performed using the pluggable screw terminals, supporting both 2-wire and 3-wire configurations for enhanced flexibility and accuracy. For setup and configuration, Delta's ISPSoft programming software, specifically the HWCONFIG utility, allows engineers to directly set module modes and parameters without extensive manual register programming. This streamlined approach simplifies commissioning and reduces integration time, making it easier to deploy the module within a control architecture.

Operation and Risk Mitigation

The AS04RTD-A operates reliably within its specified environmental parameters, with an operating temperature range of -20°C to 60°C and an IP20 rating, indicating protection against solid objects greater than 12.5mm but not against water ingress. A critical operational feature is its built-in disconnection detection, which generates an alarm or warning if an RTD sensor becomes disconnected, mitigating risks associated with unexpected temperature readings or process deviations. This feature is vital for preventing equipment damage or product spoilage due to a loss of temperature monitoring. Troubleshooting typically involves verifying wiring integrity, ensuring correct sensor type selection in the configuration software, and checking the PLC's status for any error codes associated with the module. The manual provides detailed troubleshooting procedures and error code explanations.

Scalability & Long-Term Value

The Delta AS04RTD-A contributes to the long-term value and scalability of an automation system built on the AS Series PLC. The AS Series itself is designed for expandability, supporting up to 32 extension modules, allowing for easy integration of additional I/O or specialized modules as system requirements grow. The AS04RTD-A is compatible with the entire AS Series platform, ensuring that investments in Delta automation hardware maintain their relevance. Furthermore, Delta's commitment to IIoT and digital solutions means that data from the AS04RTD-A can be readily integrated into higher-level monitoring and data analysis systems, enabling predictive maintenance and process optimization through platforms like AWS or other cloud services via compatible communication modules. This forward-looking approach ensures the AS04RTD-A and the broader AS Series platform can adapt to evolving industrial technology trends.

Frequently Asked Questions

What types of RTD sensors does the Delta AS04RTD-A support?

The Delta AS04RTD-A module is highly versatile and supports a broad spectrum of Resistance Temperature Detector (RTD) sensors. This includes commonly used types such as Pt100, Ni100, Pt1000, and Ni1000.

It also accommodates less common but industrially relevant sensors like JPt100 and LGNi1000. Additionally, it can interface with Cu50, Cu100, and even resistor inputs within the 0–300Ω and 0–3000Ω ranges, as well as Ni120.

This extensive compatibility ensures that the AS04RTD-A can be integrated into existing systems or specified for new projects requiring diverse temperature sensing technologies.

How is the Delta AS04RTD-A installed and wired?

Installation of the AS04RTD-A module is designed for simplicity within the Delta AS Series PLC ecosystem. It mounts directly onto a standard DIN rail, a common industrial mounting standard for control cabinets.

Wiring for the four RTD input channels utilizes pluggable screw terminals. The module supports both 2-wire and 3-wire RTD configurations, offering flexibility based on sensor type and wiring distance requirements.

The screw terminals ensure secure connections, and the plug-in design simplifies module replacement or maintenance without disrupting adjacent modules.

What are the key technical specifications for the Delta AS04RTD-A?

The Delta AS04RTD-A boasts a 16-bit resolution, providing a precision of 0.1°C or 0.1°F for accurate temperature readings.

It offers a conversion time of 200 milliseconds per channel, ensuring timely data acquisition for dynamic process monitoring. The module is compatible with various RTD sensor types.

The module operates with a power consumption of 2W (or 1W in a lower power state) and has an IP20 protection rating.

What is the accuracy of the Delta AS04RTD-A?

The Delta AS04RTD-A temperature input module provides a high degree of accuracy for industrial applications. Its conversion accuracy is specified as ±0.1% relative to the input range.

This accuracy is maintained under standard ambient conditions, specifically at 25°C with a tolerance of ±5°C. Such precision is crucial for processes requiring tight temperature control.

Users can rely on this specification for applications where precise temperature monitoring directly impacts product quality, process efficiency, or safety parameters.

Can the AS04RTD-A detect a disconnected RTD sensor?

Yes, the Delta AS04RTD-A features a critical function for detecting when an RTD sensor is disconnected. This built-in capability enhances system reliability and safety.

When a sensor disconnection is detected, the module will trigger an alarm or a warning notification. This alerts operators to the issue promptly, preventing potential process disruptions or data loss.

This feature is invaluable for applications where continuous and reliable temperature monitoring is essential, mitigating risks associated with sensor failures.

What is the conversion time for the AS04RTD-A module?

The Delta AS04RTD-A module offers a fast conversion time for its four input channels. Each channel can be processed within 200 milliseconds.

This relatively quick conversion rate ensures that temperature data is updated frequently, allowing for effective real-time monitoring and control of industrial processes.

The 200 ms per channel specification is important for applications that require rapid response to temperature changes, ensuring that control systems can react promptly.

How does the AS04RTD-A integrate with Delta's AS Series PLC?

The AS04RTD-A is designed as an integral part of Delta's AS Series PLC. It connects directly to the AS Series backplane or bus, allowing for seamless communication.

Configuration and parameter setting for the AS04RTD-A are typically handled using Delta's ISPSoft programming software. The HWCONFIG utility within ISPSoft simplifies the setup process.

This integration ensures compatibility and allows for unified system design, programming, and diagnostics within the Delta automation environment.

What is the power consumption of the AS04RTD-A?

The Delta AS04RTD-A temperature input module has a typical power consumption specified as 2W. It may also operate at 1W, likely in a lower power state or under specific operating conditions.

This moderate power consumption is typical for industrial PLC modules and ensures efficient operation within control cabinets.

Users should consider the total power draw when designing their PLC power supply and distribution strategy.

What are the environmental operating conditions for the AS04RTD-A?

The AS04RTD-A is designed for standard industrial environments. It has an operating temperature range from -20°C to 60°C.

Its Ingress Protection (IP) rating is IP20. This signifies protection against solid objects larger than 12.5mm but does not offer protection against water or moisture.

Therefore, it is suitable for installation within control panels and enclosures where it is protected from direct environmental exposure.

What is the resolution of the AS04RTD-A module?

The Delta AS04RTD-A temperature input module provides a high resolution for precise temperature measurements. It offers a resolution of 0.1°C or 0.1°F.

This level of detail in temperature readings is achieved through its 16-bit analog-to-digital converter (ADC). The 16-bit resolution allows for finer granularity in capturing temperature changes.

This precision is critical for applications that require monitoring and control of processes where even small temperature variations can have significant impacts on product quality or system performance.