產(chǎn)品內(nèi)容介紹
REF615A_E操作面板
要進行調(diào)整，必須將負載和回路電源連接到通道正在校準。有兩種方法可以進行調(diào)整。一個程序需要使用電壓和電阻組裝負載和回路電源（方法1）。請參閱校準電壓/電阻程序和電壓表連接圖。第二個過程使用現(xiàn)有字段端電路（方法2）。請參閱校準步驟，電壓表連接圖和電壓/電阻圖。下表為校準電壓/電阻程序（方法1）。B872-200 4通道模擬（D/A）輸出模塊轉(zhuǎn)換數(shù)字數(shù)據(jù)輸出電壓范圍從0000到4095（12位分辨率）。
模擬輸出模塊允許您驅(qū)動各種需要的現(xiàn)場設(shè)備不同的電壓取決于您的獨特應用。您可以從四個選項中選擇可用輸出電壓范圍。范圍為0至5V、0至10V、-5至5V，和-10至10V，通過四對跳線選擇，每個通道一對。
您可以同時操作多個范圍。
該模塊設(shè)計為允許您控制每個輸出通道的狀態(tài)當可編程控制器復位或停止時。通道的輸出可以保持最后一個值（HOLD）或轉(zhuǎn)到0.0 mV，即返回零（RTZ）。
你可以使用四位DIP為四個隔離輸出中的每一個選擇此選項轉(zhuǎn)換開關(guān)與每個輸出關(guān)聯(lián)（開關(guān)1用于輸出1，等等）。這個HOLD或RTZ功能由您選擇，以滿足您的特定應用。
RTZ功能允許您將輸出歸零作為一項安全功能
HOLD公司函數(shù)允許您在丟失Ourbus后保持最后一個有效輸出值表達該模塊有四個獨立的模擬輸出，能夠更新所有四個通道每1毫秒。
12位分辨率和絕對精度為+0.1%255 C提供對應用程序的精確控制。參考下圖了解模塊的簡化示意圖。
B872接受0000到4095之間的數(shù)據(jù)值，并將其轉(zhuǎn)換為所有四個檔位的輸出電壓。輸出電壓與數(shù)據(jù)值。有關(guān)數(shù)據(jù)值到輸出的轉(zhuǎn)換圖，請參閱下圖。
下圖是數(shù)據(jù)值到輸出的轉(zhuǎn)換圖，用于B872-200模塊跳線位于模塊左側(cè)（尋找四個檢修孔）。
這些孔允許接觸四對跳線，用于選擇相關(guān)通道的輸出電壓范圍。
在之前，將所需電壓范圍設(shè)置為0至5V、0至10V、-5至5V或-10至10V安裝有關(guān)跳線設(shè)置，請參閱下圖。
另請參閱左側(cè)模塊本身的側(cè)面。模塊出廠設(shè)置為0至10V。四位DIP開關(guān)位于模塊后部。
此開關(guān)控制系統(tǒng)復位或停止時每個通道的狀態(tài)。
輸出通道可以保持最后一個值（保持）或轉(zhuǎn)到0.0 mA歸零（RTZ）。
在安裝模塊之前，將開關(guān)設(shè)置為保持或RTZ。
每個四個開關(guān)控制其相關(guān)輸出的操作模式（即開關(guān)1輸出1等）。開關(guān)設(shè)置見下圖。另外，請參閱標簽位于模塊本身的左側(cè)
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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