1746-NO4I 可编程逻辑控制器  可用于驱动调制仪器和设备

Allen-Bradley 1746-NO4I 模块是属于 SLC 500 产品平台的可编程逻辑控制器 （PLC） 模拟输出模块。该模块与上述平台一起使用，并与两 （2） 个控制器变体兼容，例如模块化硬件样式的固定硬件。

该模块能够产生 0 至 20 mA 的输出电流范围，可用于驱动调制仪器和设备。典型的模拟输出连接到控制器的控制命令。如果与比例-积分-微分控制器一起使用，则分配模拟输出来表示 PID 控制器的控制输出 （CO）。对于手动装载站，模拟输出表示操作员输入的手动命令。它还可用于将重要信号重新传输到单个或多个设备。这可能用于指示、数据记录和信号转换。

通过修改模块属性来分配适当的信号。该模块还安装了嵌入式选择开关，以允许选择电源。可以选择内部电源，这意味着模块将利用背板的电源，而外部电源是指规格为 24 ±10% （最大 195 mA）的外部电源。Allen-Bradley 1746-NO4I 是 SLC 500 四 （4） 通道模拟输出模块，使用 16 位 2 的互补二进制格式。

它有 4 个电流输出，输出范围为 0 至 +20 mA，满量程电流输出为 21 mA。该模块的背板电流消耗在 5 VDC 时为 55 mA，在 24 VDC 时为 195 mA，而超范围容量为 5%（0 至 21 mA 和 1 LSB）。其额定电源电压为 24 伏直流电 +/- 10%，最大电流为 195 mA，背板隔离为 500 伏直流电。请注意，当 SLC 电源没有足够的电力流出时，某些应用需要 21.6 至 26.4 伏直流电源。

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1746-NO4I 可编程逻辑控制器  可用于驱动调制仪器和设备

The Allen-Bradley 1746-NO4I module is a Programmable logic controller (PLC) analog output module for the SLC 500 product platform. The module is used with the above platform and is compatible with two (2) controller variants, such as modular hardware style fixed hardware.

The module is capable of producing an output current range of 0 to 20 mA and can be used to drive modulation instruments and devices. A typical analog output is a control command connected to a controller. If used with a proportional-integral-differential controller, an analog output is assigned to represent the control output (CO) of the PID controller. For manual loading stations, the analog output represents the manual commands entered by the operator. It can also be used to retransmit important signals to a single or multiple devices. This may be used for indication, data recording, and signal conversion.

Assign the appropriate signal by modifying the module properties. The module is also fitted with an embedded selector switch to allow power supply selection. An internal power supply can be selected, which means that the module will utilize the power supply from the backplane, while an external power supply is defined as an external power supply with a specification of 24 ±10% (up to 195 mA). Allen-Bradley 1746-NO4I is an SLC 500 four (4) channel analog output module that uses a 16-bit 2 complementary binary format.

It has 4 current outputs ranging from 0 to +20 mA and a full scale current output of 21 mA. The backplane current consumption of the module is 55 mA at 5 VDC and 195 mA at 24 VDC, while the overrange capacity is 5% (0 to 21 mA and 1 LSB). It has a rated supply voltage of 24 volts DC +/ -10% with a maximum current of 195 mA and a backplane isolation of 500 volts DC. Note that some applications require 21.6 to 26.4 volts DC power when the SLC power supply does not have enough power flowing out.

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