ABB AIM0016 2RCA007120D 2RCA007128A0001C模块板
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ABB AIM0016 2RCA007120D 2RCA007128A0001C为机柜外的现场设备供电这用于向机柜外的过程信号和设备供电。干扰通过位于AC 800M控制器机柜中的电源为现场设备供电通常需要使用长24 V DC电缆，该电缆可以很容易地拾取本地干扰并将其直接引回到电源单元。ABB AIM0016 2RCA007120D 2RCA007128A0001C安装电缆时，请遵循第62页电缆下的现场电缆说明。电源输出短路SD83X系列电源的输出端没有多余的储能器。如果发生短路，电源输出电压将迅速下降。短路（即使在24 V直流配电系统中安装了熔断器）或大负载变化可能会导致电源电压下降。为了避免AC 800M控制器受到现场设备的影响，强烈建议安装单独的电源（参见第147页图50和第148页图51）。现场设备分段如果将连接到AC 800M控制器的现场设备分组，从而避免一个组中的电源故障影响其他组的电源，则建议为每个现场设备组使用单独的电源。ABB AIM0016 2RCA007120D 2RCA007128A0001C
ABB AIM0016 2RCA007120D 2RCA007128A0001CPowering Field Equipment outside the Cabinet This is intended for supplying power to process signals and equipment located outside the cabinet. Interference Powering field equipment from a power supply located in the AC 800M Controller cabinet often requires the use of long 24 V DC cables that can easily pick up local interference and direct it straight back to the power supply units. When installing the cables, follow the instructions for Field Cables, given under Cables on page 62. Short-Circuit at Power Supply Output The SD83X series power supply has no extra energy reservoir at its outputs. In the event of a short circuit the power supply output voltage will fall rapidly. Short circuits (even with fuses installed in the 24 V DC distribution system) or ABB AIM0016 2RCA007120D 2RCA007128A0001Clarge load changes can produce unwanted voltage dips in supply To avoid the AC 800M Controller being influenced by field equipment, it is strongly recommended that separate power supplies be installed (see Figure 50 on page 147 and Figure 51 on page 148). Sectioning Field Equipment If field equipment connected to an AC 800M Controller is to be sectioned into groups – thus avoiding a power failure in one group from influencing the power to other groups – then it is recommended to use separate power supplies for each field equipment group.ABB AIM0016 2RCA007120D 2RCA007128A0001C
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