1756-DHRIO 接口模块 该模块有2个通道

【功能描述】

Allen-Bradley 1756-DHRIO是ControlLogix数据高速公路+ /远程I/O通信接口模块。该模块有2个通道，根据电缆长度的不同，支持57.6千字节/秒、115.2千字节/秒和230.4千字节/秒的通信速率。它可以通过最多三个机箱和四个通信网络传输消息。通过该模块，可以在plc, slc和ControlLogix控制器等设备之间进行信息交换，甚至在不同的网络上。

它支持以下通信类型:设备之间的远程I/O、控制和信息协议(CIP)消息传递和数据高速公路+ (DH+)消息传递。它可以有多达32个Logix连接，远程I/O链路可以连接到远程I/O设备，以及其他智能设备。当连接到远程I/O网络时，它可以充当适配器或扫描仪，即使在没有消息指令的情况下也可以传输模拟、数字、块和专用数据。在安装1756-DHRIO模块之前，需要对每个通道的网络型交换机进行编程，并安装和连接ControlLogix电源和机箱。您可以在同一个机箱中安装尽可能多的模块，但这取决于您的可用电源。请注意，即使在机箱供电的情况下，模块也可以安装或拆卸，但您需要遵守安全注意事项，特别是在没有危险的区域，并且拔掉电源，以防止电弧对模块和连接器的触点造成过度磨损。由于模块对静电放电敏感，请务必放电。

RIO和DH+协议使用相同的电缆类型。推荐使用Belden 89463双轴电缆，0.52 mm²(20awg)，额定温度200℃。适用的备用连接器为凤凰端子，部件号为MVSTBR2.5/3-ST BK AU。

DH+和远程I/O网络需要使用终端电阻，因为它遵循菊花链拓扑结构。这个电阻器安装在网络的第一个和最后一个节点。电阻器值取决于网络速度。230.4Kbps的网速为82欧姆。网络速度为57.6 Kbps或115.2 Kbps时使用150欧姆。其他考虑因素还包括连接到网络的设备类型。终端电阻安装在电缆的1号线和2号线之间。第三根电缆是屏蔽电缆。

为了按照RIO协议终止电缆，1号线连接到底部引脚或端子1，屏蔽电缆端接到中间引脚，2号线端接到最后一个引脚。要按照DH+协议适当地布线，只需将1号线和2号线反向连接即可。

该模块支持与Flex IO, POINT IO系统的通信，以及与PLC 5, SLC, CompactLogix和ControlLogix控制器的消息传递功能。

1756-DHRIO 接口模块 该模块有2个通道

Allen-Bradley 1756-DHRIO is the ControlLogix Data Highway + / Remote I/O communication interface module. The module has two channels and supports communication rates of 57.6 kilobytes per second, 115.2 kilobytes per second, and 230.4 kilobytes per second depending on the cable length. It can transmit messages over up to three chassis and four communication networks. With this module, information can be exchanged between devices such as PLCS, SLCS and ControlLogix controllers, even on different networks.

It supports the following types of communication: Remote I/O, Control and Information Protocol (CIP) messaging and Data Highway + (DH+) messaging between devices. It can have up to 32 Logix connections, remote I/O links to remote I/O devices, and other smart devices. When connected to a remote I/O network, it can act as an adapter or scanner, transferring analog, digital, block, and dedicated data even in the absence of message instructions. Before installing the 1756-DHRIO module, network switches for each channel need to be programmed, and ControlLogix power supplies and enclosures installed and connected. You can install as many modules as you want in the same case, but it depends on your available power supply. Note that modules can be installed or removed even when the case is powered, but you need to follow safety precautions, especially in areas where there is no danger, and unplug the power supply to prevent excessive wear of the module and connector contacts by arcing. Discharge the module because it is sensitive to electrostatic discharge.

The RIO and DH+ protocols use the same cable type. Belden 89463 two-axis cable, 0.52 mm²(20awg), rated at 200 ° C is recommended. The suitable alternate connector is the Phoenix terminal, part number is MVSTBR2.5/3-ST BK AU.

DH+ and remote I/O networks require the use of terminal resistors because it follows the Daisy chain topology. This resistor is installed at the first and last node of the network. The resistor value depends on the network speed. The Internet speed of 230.4Kbps is 82 ohms. Use 150 ohms at 57.6 Kbps or 115.2 Kbps network speeds. Other considerations include the type of device connected to the network. The terminal resistance is installed between line 1 and line 2 of the cable. The third cable is a shielded cable.

To terminate the cable in accordance with the RIO protocol, wire 1 is connected to the bottom pin or terminal 1, the shielded cable end is connected to the middle pin, and wire 2 is connected to the last pin. To properly route according to the DH+ protocol, simply reverse wire 1 and wire 2.

The module supports communication with Flex IO, POINT IO systems, and messaging with PLC 5, SLC, CompactLogix, and ControlLogix controllers.

1756-DHRIO 接口模块 该模块有2个通道

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