Technical Specifications
| 参数名称 | 参数值 |
|---|---|
| 产品型号 | Allen-Bradley 1738-ACNR |
| 制造商 | Allen-Bradley (Rockwell Automation) |
| 产品类型 | ControlNet 网络适配器 |
| 系列 | ArmorPoint I/O 1738 |
| 通信协议 | ControlNet |
| 连接器类型 | TNC |
| 输入电压范围 | 10-28V DC |
| 现场侧电源要求 | 24V DC @ 425mA (8.0W) |
| 浪涌电流 | 6A / 10ms |
| 最大功耗 | 2.8W @ 28.8V |
| 最大 I/O 模块容量 | 63 个 ArmorPoint 模块 |
| 最大 I/O 点数 | 252 点/网络 |
| 工作温度 | -20°C 至 +60°C |
| 防护等级 | IP69K |
| 尺寸（宽×高×深） | 72 × 112 × 65 mm |
| 生命周期状态 | 已停产（2025年12月31日） |
Main Features and Advantages
On-Machine IP69K Construction: The Allen-Bradley 1738-ACNR is specifically engineered for direct mounting on industrial machinery, eliminating the need for traditional control cabinets in distributed I/O applications. Its IP69K-rated housing withstands high-pressure washdown, dust ingress, and vibration, making it suitable for food and beverage processing, pharmaceutical manufacturing, and automotive assembly lines where equipment must endure frequent cleaning and harsh conditions . This on-machine capability reduces wiring complexity and installation cost by placing I/O interfaces closer to the sensors and actuators they serve.
Redundant ControlNet Communication: The Allen-Bradley 1738-ACNR supports ControlNet redundant media configurations, providing two independent communication paths for enhanced network reliability. If one ControlNet cable or path fails, the adapter automatically switches to the alternate path, maintaining continuous I/O data exchange with the controller. This redundancy is critical in applications where loss of I/O communication could halt production or compromise safety, such as continuous process lines or automated assembly systems .
High I/O Density per Network Node: A single Allen-Bradley 1738-ACNR adapter can interface up to 63 ArmorPoint I/O modules, supporting as many as 252 I/O points per ControlNet node . This high capacity enables extensive distributed I/O systems to operate through a single network connection, reducing the number of ControlNet nodes, cable runs, and network infrastructure components required. The adapter’s POINTBus backplane distributes power and data to all connected modules, while the 1738-EP24DC expansion power supply can be added when additional backplane current is needed .
Broad ArmorPoint I/O Compatibility: The Allen-Bradley 1738-ACNR is compatible with the complete range of ArmorPoint I/O modules, including digital, analog, and specialty modules. This compatibility allows system designers to mix I/O types flexibly within a single network node, tailoring each installation to specific application requirements. The adapter is ODVA-conformant for ControlNet communication, ensuring reliable interoperability with ControlNet scanners and controllers from Rockwell Automation and other vendors .
