1746-A7 SLC 7 插槽机箱

Description

1746-A7 SLC 7 插槽机箱

Allen-Bradley 1746-A7包含模块化处理器、通信适配器模块和输入输出模块。该机箱有7个插槽，是SLC 500模块化机箱的一部分，提供了系统配置的灵活性。在模块化系统中，每个机箱都需要自己的电源。SLC 500 1746-A7模块化机箱可以作为一个独立单元在一个系统中使用，也可以与另一个或两个本地机箱一起工作。机箱互联电缆可用于构建多个机箱配置和扩展信号线。这最多可以创建总共30个I/O插槽。使用不同长度的1746-C9或1746-C16线缆垂直连接机箱。两根电缆都有一个刚性的，不弯曲的收缩包，当模块连接在另一个下面时，可以缓解应变。水平布线时，使用1746-C7线缆。不要使用任何其他电缆进行安装。电缆过长可能会影响数据通信的完整性，导致操作不安全。

从1746-A7机箱到接地母线进行接地连接可以降低电阻。接地时，请勿将两个耳耳直接叠在一起。压缩会导致这些连接变得松动。1746-A7的最大背板电流为10A时的5.1伏直流电流或2.88A时的24伏直流电流。为获得最佳性能，工作环境温度为0℃~ 60℃(32℃~ 140℉)，相对湿度为5% ~ 95%(无冷凝)。

1746-A7是一款SLC 500机箱，可安装SLC 500模块，如SLC处理器、SLC IO模块、SLC通信适配器和专用模块。

1746-A7具有7个插槽，通过在控制器所在的主机箱上再连接2个机箱，可以扩展到21个模块。这是通过使用部件号为1746-C9, 1746-C7和其他不同长度的互连电缆来完成的。每个机箱需要单独的电源，但只需要一个SLC 500处理器。该处理器应放置或安装在主机箱上。扩展机箱被视为远程IO机架。

SLC 500还有其他型号的底盘，包括1746-A13、1746-A10和1746-A4。所有这些机箱，包括1746-A7都有一个嵌入式电子电路，它连接到电源插槽。该电路用作背板，其中功率被分配到插入的模块。同时作为处理器和模块之间的信息交换，因此，SLC 500模块化控制器离不开机箱。

在其他术语中，机箱也可以称为机架或背板。在典型的应用中，这个机箱是水平安装的。如果系统需要一个以上的底盘，也允许并排安装，前提是有精确的面板空间，并保持7.7厘米至10.2厘米或3.0至4.0英寸的建议间隔。

1746-A7

1746-A7 SLC 7 插槽机箱

The Allen-Bradley 1746-A7 houses the modular processor, communication adapter module, and input and output modules. This chassis is built with 7 slots that is part of the SLC 500 Modular Chassis that provide flexibility in the configuration of systems. In a modular system, each chassis will require its own power supply. The SLC 500 1746-A7 Modular Chassis can be used as a standalone unit in one system or can work with another one or two local chassis. The chassis interconnection cable can be used to build multiple chassis configurations and extend signal lines. This can create a total of 30 I/O slots at maximum. Interconnect chassis vertically with the 1746-C9 cable or 1746-C16 cable that comes in different lengths. Both cables have a rigid, unbending shrink wrap for strain relief when linking modules with one below another. For a horizontal layout, use the 1746-C7 cable. Do not use any other cables for the setup. Longer cables may affect data communication integrity leading to unsafe operation.

Running a ground connection from the 1746-A7 Chassis to the ground bus reduces electrical resistance. When grounding, do not lay one lug directly on top of another. Compression can cause these connections to become loose. The 1746-A7 has a maximum backplane current of 5.1 Volts DC at 10A or  24 Volts DC at 2.88A. For optimal performance, operate in temperatures between 0 degrees Celsius to 60 degrees Celsius (32 to 140 degrees Fahrenheit), and relative humidity of 5% to 95% (without condensation).

The 1746-A7 is an SLC 500 chassis that provides mounting to SLC 500 modules such as SLC processors, SLC IO modules, SLC Communication adapters and specialty module.

The 1746-A7 features Seven (7) slots with which may be expanded up to 21 modules by connecting an additional of Two (2) more chassis from the main chassis where the controller resides. This is done with the use of interconnection cables with part number 1746-C9, 1746-C7 and other interconnect cables with varying lengths. Each chassis requires individual power supply but only one SLC 500 processor is needed. This processor shall be stationed or installed to the main chassis. The expansion chassis are treated as remote IO racks.

SLC 500 come with other variants of chassis including 1746-A13, 1746-A10 and 1746-A4. All of these chassis, including the 1746-A7 has an embedded electronic circuitry which is connected to the Power Supply slot. This circuitry is used as the backplane where power is distributed to the inserted modules. It also serves as the information exchanged between the processor and modules therefore, an SLC 500 Modular Style controller cannot be operated without a chassis.

In other terminologies, chassis may also referred to as Rack or Backplane. In typical applications, this chassis is installed horizontally. If more than one chassis is needed by the system, side by side installation is also permitted provided that there is accurate panel space and the recommended separation of 7.7 cm to 10.2 cm or 3.0 to 4.0 inches is maintained.