Delta AS228T-A Large Capacity 28-point Transistor Output Module

The Delta AS228T-A is a high-performance, compact, modular mid-range PLC designed for demanding industrial automation tasks. It features Delta's proprietary 32-bit SoC CPU, delivering exceptional processing speeds of up to 40k steps per millisecond. This capability ensures efficient execution of complex control logic and high-speed operations. With 16 digital inputs and 12 transistor (NPN) digital outputs, the AS228T-A provides 28 points of I/O on the CPU module itself, expandable up to 1,024 points with 32 extension modules. The PLC supports precise motion control, capable of managing up to 8 axes via CANopen or 6 axes via 200 kHz pulse control. Its robust connectivity options include Ethernet, dual RS-485 ports, USB, and CANopen, facilitating seamless integration into various industrial networks and SCADA systems. Programming and configuration are simplified through Delta's ISPSoft and DIADesigner software, which support multiple IEC 61131-3 programming languages and offer advanced features like hardware setup, diagnostics, and positioning planning. The AS228T-A's rackless design with patented DIN rail clips ensures straightforward installation and maintenance in challenging industrial environments.

Delta AS228T-A Product Specifications

| Feature                 | Specification                                                                                                          |

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

| Model Name              | AS228T-A                                                                                                               |

| Series                  | AS Series                                                                                                              |

| CPU                     | 32-bit SoC (System on Chip)                                                                                            |

| Program Capacity        | 64k steps                                                                                                              |

| Data Registers          | 60k words                                                                                                              |

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

| Max. Extension Modules  | 32                                                                                                                     |

| Execution Speed         | Up to 40 k steps/ms                                                                                                    |

| Digital Inputs (DI)     | 16                                                                                                                     |

| Digital Outputs (DO)    | 12 (NPN Transistor Output)                                                                                             |

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

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

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

| Supply Voltage          | 24V DC                                                                                                                 |

| Programming Software    | ISPSoft, DIADesigner                                                                                                   |

| Programming Languages   | Ladder Diagram (LD), Structured Text (ST), Continuous Function Chart (CFC), Sequential Function Chart (SFC), C Language |

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

| Mounting                | DIN Rail                                                                                                               |

| Dimensions              | (Refer to product documentation for specific dimensions)                                                               |

| Ingress Protection      | IP20                                                                                                                   |

Core Features & Market Positioning

The Delta AS228T-A distinguishes itself in the mid-range PLC market through its powerful combination of high-speed processing, extensive I/O expansion capabilities, and advanced motion control features. Its custom-developed 32-bit SoC CPU offers a significant performance advantage over many competitors, enabling rapid execution of complex automation routines and precise control of high-speed machinery. The modular design, supporting up to 32 extension modules for a total of 1,024 I/O points, provides exceptional scalability, allowing systems to grow with evolving production demands. This flexibility positions the AS228T-A as a cost-effective solution for applications that may start with modest I/O requirements but anticipate future expansion. Furthermore, its integrated motion control capabilities, including support for CANopen motion networks and high-speed pulse outputs, make it a strong contender for applications requiring sophisticated multi-axis synchronization and precise positioning, such as in electronics manufacturing, labeling, and packaging equipment. The inclusion of multiple communication interfaces like Ethernet and dual RS-485 ports ensures seamless integration into existing industrial networks and facilitates IIoT connectivity.

Key Application Scenarios

The robust performance and versatility of the Delta AS228T-A PLC make it an ideal choice for a wide array of industrial applications. Its high-speed processing and precise motion control are particularly well-suited for:

  Electronics Manufacturing: Automating assembly lines, pick-and-place machines, and testing equipment where speed and accuracy are paramount. The AS228T-A can manage complex sequences and synchronize multiple axes for high-volume production.  Labeling and Packaging Machinery: High-speed labeling machines, filling equipment, and carton erectors benefit from the PLC's ability to perform rapid I/O updates and precise motion synchronization for consistent product handling and application.  Textile Machinery: Modern textile equipment, such as advanced looms and cutting machines, requires precise control over numerous actuators and precise timing, which the AS228T-A can efficiently manage.  Material Handling Systems: Automated guided vehicles (AGVs), conveyor systems, and robotic arms in warehouses and distribution centers can leverage the AS228T-A's motion control and communication capabilities for efficient material flow.  Industrial Automation: General-purpose automation across various industries, including food and beverage processing, automotive manufacturing, and general machine building, can utilize the AS228T-A for reliable and scalable control solutions.

Practical System Integration Guidance

Integrating the Delta AS228T-A into an industrial control system is streamlined due to its modular design and user-friendly software.

Installation: The PLC features a rackless design and utilizes patented DIN rail clips for quick vertical mounting, simplifying installation in control cabinets and reducing setup time. Screwless (push-in) terminals further expedite wiring and maintenance procedures. Ensure proper grounding for safety and optimal performance.

Wiring: Digital inputs (16) and outputs (12) are clearly marked. The NPN transistor outputs are suitable for driving loads like relays, solenoids, or indicator lights. Always refer to the AS Series Hardware Manual for detailed wiring diagrams specific to the AS228T-A and any connected extension modules.

Programming: Delta's ISPSoft software is the primary tool for programming the AS228T-A. It supports multiple IEC 61131-3 languages, including Ladder Diagram (LD), Structured Text (ST), and others, allowing engineers to use familiar programming paradigms. DIADesigner is also used for hardware and network configuration. The software facilitates easy configuration of communication protocols, diagnostics, and motion control parameters. For example, configuring CANopen motion control can be achieved through dedicated function blocks, simplifying the integration of servo drives and motion devices.

Communication Setup: The AS228T-A supports various industrial communication protocols, including Modbus RTU/TCP, EtherNet/IP, and CANopen. Configuring these protocols involves setting up communication parameters within ISPSoft, assigning IP addresses for Ethernet communication, or configuring node IDs for CANopen networks. The dual RS-485 ports are ideal for Modbus serial communication, while the Ethernet port offers higher bandwidth for Modbus TCP or EtherNet/IP applications.

Operation and Risk Mitigation

Proper operation and adherence to safety guidelines are crucial when working with the Delta AS228T-A PLC to ensure reliable performance and prevent potential hazards.

Operational Considerations: The PLC operates on a 24V DC supply, common in industrial environments. Ensure the power supply is stable and within the specified voltage range to prevent malfunctions. Monitor system performance through diagnostic tools within ISPSoft. The use of micro SD cards allows for program backup and restoration, which is vital for quick recovery in case of unexpected downtime or system failures.

Troubleshooting: Common issues might include communication errors, I/O malfunctions, or program execution problems. If an I/O point is not functioning as expected, verify wiring, check the NPN output configuration against the load requirements, and ensure the input signal is correctly received. Communication errors can often be resolved by checking cable integrity, verifying communication parameters (baud rate, parity, IP addresses), and ensuring network devices are properly configured. Refer to the AS Series Hardware Manual for specific error codes and detailed troubleshooting steps.

Risk Mitigation: Always implement appropriate safety measures, including proper grounding, electrical isolation where necessary, and emergency stop circuits. Never perform wiring or maintenance while the unit is powered on. Ensure that all personnel working with the PLC are adequately trained on its operation and safety procedures. The multi-layer password protection feature in ISPSoft can enhance system security by preventing unauthorized access to the program and configurations.

Scalability & Long-Term Value

The Delta AS228T-A is engineered for scalability, offering significant long-term value for industrial automation systems. Its modular architecture is a key enabler of this scalability.

I/O Expansion: The core AS228T-A CPU module provides 28 I/O points, but this can be expanded significantly. By adding up to 32 extension modules, the total I/O capacity can reach 1,024 points. This allows the system to grow and adapt to increased production demands or the integration of new machinery without requiring a complete PLC replacement.

Connectivity and IIoT Integration: The inclusion of multiple communication ports, such as Ethernet, CANopen, and RS-485, ensures the AS228T-A can be readily integrated into modern industrial networks. It supports protocols like EtherNet/IP and Modbus TCP, which are foundational for SCADA systems and Industrial Internet of Things (IIoT) initiatives. This enables real-time data collection, remote monitoring, and predictive maintenance, enhancing operational efficiency and providing valuable insights into production processes.

Compatibility and Upgrade Paths: As part of Delta's AS Series, the AS228T-A benefits from a cohesive product ecosystem. While specific upgrade paths to newer Delta PLC generations should be confirmed with Delta documentation or support, the inherent modularity and standard communication protocols provide a solid foundation for future system enhancements. The ability to program using standardized IEC 61131-3 languages ensures a degree of software compatibility and makes it easier to migrate logic if needed in the future.

Frequently Asked Questions (FAQs)

Q1: What are the main advantages of the Delta AS228T-A PLC?

The AS228T-A offers high-speed processing with its 32-bit SoC CPU, executing up to 40k steps/ms. It boasts extensive I/O scalability, supporting up to 1,024 points with 32 extension modules. The PLC also provides advanced motion control capabilities for precise axis management.

Q2: What types of digital outputs does the Delta AS228T-A have?

This PLC model features 12 digital outputs specifically designed as NPN transistor outputs. These are suitable for driving loads like relays, solenoids, and indicator lights that require a sinking current configuration.

Q3: How can I program the Delta AS228T-A PLC?

You can program the AS228T-A using Delta's dedicated software, ISPSoft or DIADesigner. These platforms support multiple programming languages, including Ladder Diagram (LD) and Structured Text (ST), adhering to IEC 61131-3 standards.

Q4: What communication protocols are supported by the AS228T-A?

The Delta AS228T-A supports a range of industrial protocols, including Modbus RTU/TCP, EtherNet/IP, and CANopen. It is equipped with Ethernet, dual RS-485, USB, and CANopen ports for versatile network integration.

Q5: Can the Delta AS228T-A handle motion control applications?

Yes, the AS228T-A is well-equipped for motion control. It can manage up to 8 axes via the CANopen motion network and up to 6 axes through high-speed 200 kHz pulse control, making it ideal for precise positioning tasks.

Q6: What is the maximum I/O capacity of the AS228T-A?

The AS228T-A itself has 28 built-in I/O points (16 DI, 12 DO). However, it is highly scalable and can support up to 1,024 I/O points when combined with up to 32 extension modules from the AS Series.

Q7: How is the Delta AS228T-A physically installed?

Installation is straightforward due to its compact, rackless design and DIN rail mounting capability. It uses patented DIN rail clips for secure and fast vertical installation within control cabinets, simplifying setup.

Q8: What are the typical industries or applications for the AS228T-A?

The AS228T-A is commonly used in electronics manufacturing, labeling, food packaging, and textile machinery due to its speed and precision. It's also suitable for various general industrial automation and machine control scenarios.

Q9: Does the AS228T-A support IIoT or Industry 4.0 connectivity?

Yes, with its Ethernet and CANopen support for protocols like EtherNet/IP and Modbus TCP, the AS228T-A can be integrated into IIoT platforms for data acquisition, remote monitoring, and advanced analytics.

Q10: What is the power supply requirement for the Delta AS228T-A?

The Delta AS228T-A operates on a standard industrial 24V DC power supply. This ensures compatibility with most common power distribution systems found in automation environments.