1769-SDN 是一款兼容 1769 系统的 DeviceNet 扫描器通信模块

1769-SDN 是一款兼容 1769 系统的 DeviceNet 扫描器通信模块

Allen-Bradley 1769-SDN 是一款 PLC，可作为 CompactLogix DeviceNet 扫描器通信模块运行。通过 1769-SDN，可以在 CompactLogix 控制器、MicroLogix 1500 可编程控制器和 DeviceNet 设备之间进行通信。该模块的尺寸为 118x 87 x 35 毫米，包括其 138 毫米的安装片。该模块重约 280 克或 0.61 磅，在 5 伏直流（2.2 瓦）时的zui大总线电流消耗为 440 mA，zui大散热为 3.8 瓦。

1769-SDN 不应安装在环境大气中含有挥发性或腐蚀性气体、蒸气或灰尘的任何地方。1769-SDN 的工作温度为 0 至 60 摄氏度或 32 至 140 华氏度，不应存放在腐蚀性环境中的任何地方。此模块与连接的 PowerFlex 4 级变频器之间的zui大电缆距离为 10 米。zui大电缆长度必须为 500 米（125K 波特）和 100 米（500K 波特）。1769-SDN 距离电源不能超过 4 个模块，因此，它的电源距离额定值为 4。其 DeviceNet 电源要求为 N.E.C. 2 类 11 伏直流时 90 mA、25 伏直流时 110 mA 和 1.5 毫秒 200 mA。1769-SDN 能够从属设备读取和写入输出，与对等设备通信，并通过给定的 DeviceNet 网络将程序加载到基于 1764-LRP 的控制器。

Allen-Bradley 1769-SDN 是一款 CompactLogix 通信模块。具体来说，该模块是一个DeviceNet扫描器模块，用于与其他DeviceNet适配器和其他支持DeviceNet的设备（如可调频率交流驱动器、伺服驱动器和其他设备）交换信息。该扫描器用作 DeviceNet 设备与其所连接的可编程控制器之间的接口。

DeviceNet 扫描程序通过搜索正确配置的 DeviceNet 适配器来建立与网络的连接。扫描程序发送选通、轮询、状态更改或循环 I/O 消息，以请求数据并将其传送到网络中的每个设备。接收到的数据被收集和组织，然后由处理器访问这些数据，以实现与收集的数据相关的特定用户逻辑。

至少需要 RSLinx 才能从网络浏览设备。
1769-SDN 不像其他模块那样需要外部电源。背板为模块的电路提供通电电压。模块安装是通过直接在控制器组件中插入任何可用插槽来完成的。执行此操作时，请验证模块的位置是否在所需的电源距离额定值四 （4） 范围内。

在上电期间，模块进行自检。完成自检后，扫描仪将进入活动状态，并立即执行其编程的配置设置。扫描器模块的默认设置为通信速率 125kbps 和节点地址 63。

1769-SDN 是一款兼容 1769 系统的 DeviceNet 扫描器通信模块

Allen-Bradley 1769-SDN is a PLC that operates as a CompactLogix DeviceNet scanner communication module. With 1769-SDN, you can communicate between CompactLogix controllers, MicroLogix 1500 programmable controllers, and DeviceNet devices. The module measures 118x 87 x 35mm, including its 138mm mounting piece. The module weighs about 280 grams or 0.61 pounds, has a maximum bus current consumption of 440 mA at 5 volts DC (2.2 watts) and a maximum heat dissipation of 3.8 watts.

1769-SDN should not be installed anywhere where the ambient atmosphere contains volatile or corrosive gases, vapors, or dust. The 1769-SDN operates at a temperature of 0 to 60 degrees Celsius or 32 to 140 degrees Fahrenheit and should not be stored anywhere in corrosive environments. The maximum cable distance between this module and the connected PowerFlex Level 4 inverter is 10 meters. The maximum cable length must be 500 meters (125K baud) and 100 meters (500K baud). The 1769-SDN cannot be more than 4 modules away from the power supply, so it has a power distance rating of 4. The DeviceNet power requirements are 90 mA at 11 V DC, 110 mA at 25 V DC, and 1.5 ms 200 mA for Class N.E.C. 2. The 1769-SDN is capable of slave devices reading and writing outputs, communicating with peer devices, and loading programs to a 1764-LRP-based controller over a given DeviceNet network.

Allen-Bradley 1769-SDN is a CompactLogix communication module. Specifically, the module is a DeviceNet scanner module for exchanging information with other DeviceNet adapters and other Devicenet-enabled devices such as tunable AC drives, servo drives, and other devices. The scanner acts as an interface between the DeviceNet device and the programmable controller to which it is connected.

The DeviceNet scanner establishes a connection to the network by searching for the correctly configured DeviceNet adapter. The scanner sends strobes, polls, status changes, or loop I/O messages to request data and deliver it to each device in the network. The received data is collected and organized, which is then accessed by the processor to implement specific user logic related to the collected data.

At least RSLinx is required to browse the device from the network.
The 1769-SDN does not require an external power supply like other modules. The backplane provides power to the circuit of the module. Module installation is done by inserting any available slots directly into the controller assembly. When doing this, verify that the location of the module is within the required power distance rating of four (4).

During the power-on, the module performs a self-check. After completing the self-test, the scanner will enter an active state and immediately execute its programmed configuration Settings. The default Settings for the scanner module are 125kbps communication rate and 63 node addresses.