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REF615A_E操作面板
要进行调整，必须将负载和回路电源连接到通道正在校准。有两种方法可以进行调整。一个程序需要使用电压和电阻组装负载和回路电源（方法1）。请参阅校准电压/电阻程序和电压表连接图。第二个过程使用现有字段端电路（方法2）。请参阅校准步骤，电压表连接图和电压/电阻图。下表为校准电压/电阻程序（方法1）。B872-200 4通道模拟（D/A）输出模块转换数字数据输出电压范围从0000到4095（12位分辨率）。
模拟输出模块允许您驱动各种需要的现场设备不同的电压取决于您的独特应用。您可以从四个选项中选择可用输出电压范围。范围为0至5V、0至10V、-5至5V，和-10至10V，通过四对跳线选择，每个通道一对。
您可以同时操作多个范围。
该模块设计为允许您控制每个输出通道的状态当可编程控制器复位或停止时。通道的输出可以保持最后一个值（HOLD）或转到0.0 mV，即返回零（RTZ）。
你可以使用四位DIP为四个隔离输出中的每一个选择此选项转换开关与每个输出关联（开关1用于输出1，等等）。这个HOLD或RTZ功能由您选择，以满足您的特定应用。
RTZ功能允许您将输出归零作为一项安全功能
HOLD公司函数允许您在丢失Ourbus后保持最后一个有效输出值表达该模块有四个独立的模拟输出，能够更新所有四个通道每1毫秒。
12位分辨率和绝对精度为+0.1%255 C提供对应用程序的精确控制。参考下图了解模块的简化示意图。
B872接受0000到4095之间的数据值，并将其转换为所有四个档位的输出电压。输出电压与数据值。有关数据值到输出的转换图，请参阅下图。
下图是数据值到输出的转换图，用于B872-200模块跳线位于模块左侧（寻找四个检修孔）。
这些孔允许接触四对跳线，用于选择相关通道的输出电压范围。
在之前，将所需电压范围设置为0至5V、0至10V、-5至5V或-10至10V安装有关跳线设置，请参阅下图。
另请参阅左侧模块本身的侧面。模块出厂设置为0至10V。四位DIP开关位于模块后部。
此开关控制系统复位或停止时每个通道的状态。
输出通道可以保持最后一个值（保持）或转到0.0 mA归零（RTZ）。
在安装模块之前，将开关设置为保持或RTZ。
每个四个开关控制其相关输出的操作模式（即开关1输出1等）。开关设置见下图。另外，请参阅标签位于模块本身的左侧
To make the adjustments
a load and loop supply must be connected to the channel being calibrated. There are two ways to make the adjustments. One procedure requires a load and loop supply to be assembled using voltage and resistance (Method 1). Refer to the Calibration Voltage/Resistance Procedure and the Voltmeter Connections Diagram. The second procedure uses the existing field side circuit (Method 2). Refer to the Calibration Procedure, the Voltmeter Connections Diagram, and the Voltage/Resistance Chart. The following table the Calibration Voltage/Resistance Procedure (Method 1).The jumpers are located on the left side of the module (look for four access holes). The holes allow access to the four pairs of jumpers which are used to select an output voltage range for the associated channel. Set the desired voltage range for 0 to 5V, 0 to 10V, -5 to 5V, or -10 to 10V prior to installation. Refer to the figure below for the jumper settings. Also refer to the left side of the module itself. The module is shipped set for 0 to 10V.The four position DIP-switch is located on the rear of the module. This switch controls the state of each channel when the system is reset or stopped. The output to the channel can either remain at the last value (Hold) or go to 0.0 mA Return-ToZero (RTZ). Set the switch for either hold or RTZ prior to installation of the module. Each of the four switches control the mode of operation for its associated output (i.e., switch 1 for output 1, etc.). Refer to the figure below for switch settings. Also, refer to the label located on the left side of the module itself
The B872-200 4-Channel Analog
(D/A) Output Module converts numerical data ranging from 0000 to 4095 into output voltage ranges (12-bit resolution). The Analog Output module allows you to drive a wide array of field devices requiring different voltages based upon your unique application. You can select from four available output voltage ranges. The ranges, which are 0 to 5V, 0 to 10V, -5 to 5V, and -10 to 10V, are selected by means of four pairs of jumpers, one pair per channel. You can operate multiple ranges simultaneously. The module is designed to allow you to control the state of each output channel when the programmable controller is reset or stopped. The output of the channel can either remain at the last value (HOLD) or go to 0.0 mV i.e., return-to-zero (RTZ). You can select this option for each of the four isolated outputs using a four-position DIP switch. A switch is associated with each output (switch 1 for output 1, etc.). The HOLD or RTZ function is selected by you to meet your specific application. The RTZ function allows you to bring the outputs to zero as a safety feature. The HOLD function allows you to maintain the last valid output value after the loss of Ourbus communication. The module has four isolated analog outputs and is capable of updates to all four channels every 1 ms. The 12-bit resolution and the absolute accuracy of +0.1% at 255 C provides precise control of your application. Refer to the figure below for the simplified schematic of the module.The B872 accepts data values ranging from 0000 to 4095 and converts them into output voltages for all four ranges. The output voltage is directly proportional to the data value. Refer to the figure below for a data value to output conversion chart. The figure below is a Data Value to Output Conversion Chart, for the B872-200 Module
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