Delta AS228R-A Large Capacity 28-point Relay Output Module

The Delta AS228R-A is a high-performance, compact modular mid-range PLC designed to meet the rigorous demands of modern industrial automation. This robust controller boasts a 64k step program capacity and 64k words of data memory, supported by Delta's proprietary 32-bit SoC CPU, which delivers exceptional execution speeds of up to 40k steps per millisecond. With 16 digital inputs and 12 relay outputs built-in, the AS228R-A offers a foundational I/O count, expandable up to a total of 1,024 points through 32 extension modules. Its versatile communication capabilities include embedded Ethernet, dual RS-485 ports, a USB port, and CANopen, facilitating seamless integration into various industrial networks and enabling high-speed data transmission. The AS228R-A is particularly adept at motion control, supporting up to 8 axes via CANopen and 6 axes through 200 kHz pulse control for precise positioning applications. This makes it an ideal solution for diverse automated equipment in sectors such as electronics manufacturing, labeling, food packaging, and textile machinery.

Delta AS228R-A Product Specifications

| Feature                 | Specification                                           |

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

| Model Name              | AS228R-A                                                |

| Series                  | AS Series                                               |

| CPU Type                | 32-bit SoC                                              |

| Program Capacity        | 64k steps                                               |

| Memory Capacity         | 64k words                                               |

| Built-in Inputs         | 16 Digital Inputs (DI)                                  |

| Built-in Outputs        | 12 Relay Outputs (DO)                                   |

| Max. I/O Points         | 1,024                                                   |

| Max. Extension Modules  | 32                                                      |

| Execution Speed         | 40k steps/ms (basic instructions: 25 ns)                |

| Built-in Communication  | USB, Ethernet, 2x RS-485, CANopen                       |

| Communication Protocols | Modbus, Modbus TCP, EtherNet/IP, CANopen                |

| Motion Control Axes     | Up to 8 (CANopen), Up to 6 (200 kHz pulse control)      |

| Programming Languages   | LD, ST, CFC, SFC, C Language                            |

| Power Supply            | 24 VDC                                                  |

| Terminal Type           | Screwless (push-in) terminals                           |

| Mounting                | DIN rail (rackless design)                              |

Core Features & Market Positioning

The Delta AS228R-A distinguishes itself in the mid-range PLC market through its powerful combination of advanced processing capabilities and extensive communication options. Its self-developed 32-bit SoC CPU offers superior execution speed compared to many competitors, enabling faster response times and the handling of more complex logic. The inclusion of multiple high-speed communication interfaces like Ethernet (supporting EtherNet/IP and Modbus TCP) and CANopen directly on the CPU module reduces the need for additional communication cards, simplifying system design and reducing costs. This positions the AS228R-A as a highly competitive option for applications demanding both performance and connectivity. Furthermore, its robust motion control features, supporting multiple axes with precise pulse control and CANopen networking, make it a strong contender for integrated automation solutions that combine PLC control with sophisticated motion synchronization. The use of screwless, push-in terminals enhances installation efficiency and maintenance, a practical advantage valued in industrial settings.

Key Application Scenarios

The Delta AS228R-A is engineered for a wide array of automated equipment and industrial processes where reliability, speed, and connectivity are paramount. Its precise motion control capabilities make it suitable for applications such as:

  Electronics Manufacturing: High-speed pick-and-place machines, automated assembly lines, and precision testing equipment benefit from the AS228R-A's rapid processing and accurate axis control.  Labeling and Packaging Machinery: The PLC's ability to manage synchronized movements for cutting, application, and filling operations ensures high throughput and accuracy in food packaging and labeling systems.  Textile Machines: Automated looms, cutting machines, and finishing equipment can leverage the AS228R-A for complex sequential operations and precise material handling.  General Automation: Any application requiring integration of multiple sensors, actuators, and drives, such as conveyor systems, material handling, and automated assembly, can be effectively managed by this versatile PLC.

Practical System Integration Guidance

Integrating the Delta AS228R-A into an industrial control system is streamlined by its modular design and comprehensive communication interfaces. Delta's ISPSoft software is the primary tool for programming, configuration, and diagnostics, supporting various IEC 61131-3 compliant languages including Ladder Diagram (LD), Structured Text (ST), and more. The rackless design with patented DIN rail clips allows for quick and secure mounting. Wiring is simplified by the inclusion of plug-in, screwless (push-in) terminals, which speed up installation and reduce potential errors. For network integration, the embedded Ethernet port supports EtherNet/IP and Modbus TCP, allowing for easy connection to supervisory systems, HMIs, and other network devices. The dual RS-485 ports offer flexibility for serial communication with devices like variable frequency drives or older equipment. When implementing motion control, utilizing the CANopen network offers a standardized and efficient way to connect multiple Delta servo drives and devices, simplifying wiring and configuration for multi-axis systems. Ensure proper grounding and power supply connections (24 VDC) according to the AS228R-A's hardware manual to maintain system stability and safety.

Operation and Risk Mitigation

Operating the Delta AS228R-A requires adherence to standard industrial safety protocols and best practices. Ensure all power connections are made securely and in accordance with local electrical codes. The relay outputs (rated at 2A per output, 8A per common) should not be overloaded. For troubleshooting, Delta provides comprehensive documentation, including programming and hardware manuals, accessible through their website. Common issues often relate to incorrect wiring, network configuration errors, or exceeding the PLC's processing capacity. Utilizing the built-in diagnostic LEDs on the module and leveraging the diagnostic features within ISPSoft can help identify and resolve problems efficiently. For critical applications, implementing proper error handling routines within the PLC program, such as using status bits from communication modules or monitoring input/output states, is crucial for fault detection and safe system shutdown. The PLC also supports multi-layer password protection for program security, safeguarding against unauthorized modifications.

Scalability & Long-Term Value

The Delta AS228R-A offers significant scalability and long-term value for evolving automation needs. Its modular design allows for expansion up to 1,024 I/O points by adding up to 32 extension modules, enabling systems to grow without requiring a complete controller replacement. Compatibility with Delta's wider AS series and other Delta automation products, such as servo drives and HMIs, ensures a cohesive system architecture. For manufacturers looking towards Industry 4.0 and the Industrial Internet of Things (IIoT), the AS228R-A's robust Ethernet and CANopen capabilities provide a solid foundation for data acquisition, remote monitoring, and integration with cloud platforms. Delta's commitment to developing its product lines, including advancements in SoC technology and network solutions, ensures that the AS228R-A remains a relevant and capable component in modern industrial automation strategies.

Frequently Asked Questions (FAQs)

Q1: What are the primary advantages of the Delta AS228R-A PLC?

The AS228R-A offers a powerful 32-bit SoC CPU for high-speed processing. It boasts extensive built-in communication ports, including Ethernet and CANopen. Its modular design allows for significant I/O expansion.

Q2: How many I/O points can the Delta AS228R-A support?

This PLC comes with 16 digital inputs and 12 relay outputs onboard. It can be expanded to support a total of up to 1,024 I/O points. This is achieved by adding up to 32 extension modules.

Q3: What communication protocols does the Delta AS228R-A support?

It supports Modbus, Modbus TCP, EtherNet/IP, and CANopen. The built-in Ethernet port is key for protocols like EtherNet/IP and Modbus TCP. CANopen is also integrated for network communication.

Q4: Can the AS228R-A be used for motion control applications?

Yes, the AS228R-A excels in motion control. It supports up to 8 axes via CANopen motion networks. It also manages up to 6 axes through 200 kHz pulse control for precise positioning.

Q5: What software is used to program the Delta AS228R-A?

Programming and configuration are done using Delta's ISPSoft software. This suite supports multiple IEC 61131-3 programming languages. It also handles hardware setup and system diagnostics.

Q6: What are the benefits of the AS228R-A's relay outputs?

Relay outputs offer electrical isolation between the control circuit and the load. They can handle higher AC and DC voltage/current loads compared to transistor outputs. This makes them versatile for many applications.

Q7: How does the AS228R-A integrate with IIoT and cloud platforms?

Its Ethernet connectivity enables seamless integration with SCADA systems and cloud platforms. Protocols like EtherNet/IP and Modbus TCP are standard for data exchange. This supports remote monitoring and data analytics.

Q8: What is the execution speed of the AS228R-A PLC?

The PLC features a 32-bit SoC CPU with an execution speed of up to 40k steps per millisecond. Basic LD instruction execution time is as fast as 25 nanoseconds. This ensures rapid response to automation tasks.

Q9: Can the AS228R-A handle harsh industrial environments?

Yes, the AS series is designed for industrial use. It features a rackless design and robust construction. The exterior is made to resist stains and dirt.

Q10: What is the maximum program capacity and memory of the AS228R-A?

The AS228R-A has a program capacity of 64k steps. It also provides 64k words of data memory. This ample capacity supports complex control logic and data logging.