ABB CMA121 3DDE300401电源卡
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ABB CMA121 3DDE300401电源卡离散继电器输出模块保护开关电感负载（如继电器线圈、灯丝或电磁线圈）的离散继电器输出模件上的输出点应具有外部保护。这通常是以RC（电阻电容器）网络的形式跨接在交流负载上，或是以反向偏置二极管的形式跨接到直流负载上。有关详细信息，请参阅GFK-0898，ABB CMA121 3DDE300401PLC I/O模块规范。高密度（32点）离散模块功能这些模块有两种类型。一种类型的面板上有一个50针连接器，另一种类型在面板上有两个24针连接器（见下两个图）。双24针类型有LED状态指示器。50针类型没有。LED状态指示器分为四组，每组八个，ABB CMA121 3DDE300401标记为A、B、C和D。它们位于模块顶部（见下图）。32点模块仅提供5、2和24 VDC额定值。32点的模块均未熔断。这些模块适用于需要大量直流输入/输出点的应用。通过使用总共支持八个0插槽机架的CPU，并用32点模块填充机架，可以获得Series 90-30系统的I/O点数。通过将CPU机架中的九个可用插槽（CPU必须占用一个插槽）与七个0插槽扩展或远程机架中的70个插槽相加，计算出可能的I/O点数，从而获得总共79个插槽。将79乘以32，最多可获得2528个I/O点（只有CPU 350-364支持这么多I/O点）。ABB CMA121 3DDE300401
ABB CMA121 3DDE300401Discrete Relay Output Module Protection Output points on discrete relay output modules that switch an inductive load such as a relay coil, lamp filament, or solenoid coil should have external protection. This is usually in the form of an RC (Resistor-Capacitor) network across an AC load, or a reverse-biased diode across a DC load. Please see GFK-0898, ABB CMA121 3DDE300401 I/O Module Specifications, for details. High Density (32-Point) Discrete Module Features There are two types of these modules. One type has a single 50-pin connector on its faceplate, the other type has a pair of 24-pin connectors on its faceplate (see next two figures).The dual 24-pin type has LED status indicators. The 50-pin type does not. The LED status indicators are arranged in four groups of eight across, labeled A, B, C, and D. They are located at the top of the module (see next figure).32-point modules are only available in 5, 2, and 24 VDC ratings.None of the 32-point modules are fused These modules are useful in applications where a high count of DC I/O points is required. The maximum number of I/O points for a Series 90-30 system can be obtained by using a CPU that supports a total of eight 0-slot racks, and by populating the racks with 32-point modules. The theoretical maximum number of I/O points possible is calculated by adding the nine available slots in the CPU rack (the CPU must occupy one slot) to the 70 slots in the seven 0-slot expansion or remote racks to get a total of 79 slots. Multiply 79 times 32 for a maximum of 2,528 I/O points (only CPUs 350 - 364 support this many I/O points). ABB CMA121 3DDE300401
品牌：ABB
型号：ABB CMA121 3DDE300401
产品说明：电源卡
特点：模块/卡件，控制器，触摸屏，伺服驱动器
优势：供应进口原装，专业停产配件。
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