產(chǎn)品內(nèi)容介紹
1C31181G01模擬量輸出模塊
輸入選擇首先，找到模塊左側(cè)的四個(gè)檢修孔。這些孔允許訪問(wèn)三個(gè)四位和一個(gè)五位DIP開(kāi)關(guān)。
接下來(lái)，設(shè)置底部五位DIP開(kāi)關(guān)的開(kāi)關(guān)位置5（SW5模塊左側(cè)的檢修孔，用于選擇輸入范圍。此開(kāi)關(guān)必須對(duì)應(yīng)八位模塊配置DIP的開(kāi)關(guān)位置8（SW8轉(zhuǎn)換SW5和SW8設(shè)置必須相同。有兩種方法可以配置模塊以接受當(dāng)前輸入。有8個(gè)差動(dòng)電流/電壓輸入模塊稱(chēng)為B875-111。有16個(gè)單端電流/電壓輸入模塊稱(chēng)為B877-111。
B875-111字段連接為八個(gè)差動(dòng)電流輸入配置B875-111時(shí)，請(qǐng)注意將接收這些輸入的通道。通過(guò)放置正極電壓輸入和電流之間的磁場(chǎng)連接器上的跳線相應(yīng)通道的輸入端子。例如，如果通道2要接收電流輸入，必須在端子#7（CH2）和端子#6之間跳線（電流輸入CH2），如下圖所示。下圖顯示了B875的簡(jiǎn)化示意圖–111模塊。
B875–111模擬輸入模塊，電流輸入示例圖開(kāi)路電壓輸入可能正或負(fù)漂移。如果需要開(kāi)路檢測(cè)，應(yīng)使用電流輸入。使用電壓時(shí)輸入，如果電阻值較大（2 M? 或更大）是放置在正極（+）和負(fù)極（-）輸入之間的現(xiàn)場(chǎng)連接器上。這個(gè)如果磁場(chǎng)連接斷開(kāi)。
B877-111字段連接電流輸入通過(guò)設(shè)置可通過(guò)側(cè)面訪問(wèn)的DIP開(kāi)關(guān)進(jìn)行選擇用于接收輸入的每個(gè)通道的蓋子。
DIP開(kāi)關(guān)將250? 精確正極輸入和模擬回路之間的電阻。
位于左側(cè)的開(kāi)關(guān)組4上的第五個(gè)開(kāi)關(guān)（SW5）選擇電壓范圍此開(kāi)關(guān)的位置必須與模塊配置的位置相同開(kāi)關(guān)SW8，位于模塊后部。
請(qǐng)參閱左側(cè)的標(biāo)簽?zāi)K側(cè)面，以及下面顯示單端輸入（B877）的當(dāng)前設(shè)置的圖示。
單端輸入的電流設(shè)置，圖（B877）1配置模塊時(shí)，將現(xiàn)場(chǎng)側(cè)接線連接至現(xiàn)場(chǎng)連接器上的適當(dāng)引腳用于16個(gè)單端輸入。
注：開(kāi)路電壓輸入可能正或負(fù)漂移。如果斷路需要檢測(cè)，應(yīng)使用電流輸入。
當(dāng)使用電壓輸入時(shí)如果電阻值較大（2 M? 或更大）放置在正極（+）和負(fù)極（-）輸入之間的磁場(chǎng)連接器。電阻器夾住如果磁場(chǎng)連接斷開(kāi)，則通道至小偏移電壓（<100 mV）。2重新安裝臨時(shí)卸下的任何模塊。
3當(dāng)使用鍵銷(xiāo)（隨外殼裝運(yùn)提供）時(shí)，將其安裝在上方和下方為該模塊的安裝選擇了外殼插槽。
4將模塊牢固但小心地插入外殼，將邊緣連接器固定在底板上。
5使用頂部和底部的外加開(kāi)槽安裝螺釘將模塊固定到外殼上模塊前面板
Input Selection First
locate the four access holes on the left side of the module. These holes allow access to three four-position and one five-position DIP switch. Next, set switch position 5 (SW5) of the five-position DIP switch found in the bottom access hole on the left side of the module, to select the input range. This switch must correspond to switch position 8 (SW8) of the eight-position module configuration DIP switch. SW5 and SW8 settings must be identical.There are two ways to configure the module to accept current inputs. With eight differential current/voltage inputs the module is called the B875-111. With sixteen single-ended current/voltage inputs the module is called the B877-111. B875-111 field connections When configuring the B875-111 for eight differential current inputs, note the channels that will receive these inputs. Current inputs are selected by placing a jumper on the field connector between the positive voltage input and the current input terminal for the appropriate channel. For example, if channel 2 is to receive a current input, a jumper must be made between terminal #7 (CH2) and terminal #6 (Current Input CH2), as shown on the following illustration. The following illustration represents the simplified schematic diagram for the B875– 111 module. B875–111 Analog Input Module, Current Input Example Drawing
Open-circuit voltage inputs may drift either positive or negatively. If opencircuit detection is required, a current input should be used. When using voltage inputs, an open circuit can be detected if a large-value resistor (2 M? or greater) is placed at the field connector across the positive (+) and negative (-) inputs. The resistor clamps the channel to a small offset voltage (<100 mV) if the field connections are broken.
B877-111 Field Connections
Current inputs are selected by setting the DIP switches accessible through the side cover for each channel to receive an input. The DIP switch places a 250 ? precision resistor between the positive input and analog returns. The fifth switch (SW5) on switch bank 4, located on the left side selects the voltage range. The position of this switch must be the same as for module configuration switch SW8, located at the rear of the module.Refer to the label located on the left side of the module, and to the illustration showing the current settings for singleended inputs (B877) below. Current Settings for Single-Ended Inputs, Diagram (B877)1 Connect field-side wiring to proper pins on field connector when module is configured for sixteen single-ended inputs. Note: Open-circuit voltage inputs may drift either positive or negatively. If open-circuit detection is required, a current input should be used. When using voltage inputs, an open circuit can be detected if a large-value resistor (2 M? or greater) is placed at the field connector across the positive (+) and negative (-) inputs. The resistor clamps the channel to a small offset voltage (<100 mV) if the field connections are broken. 2 Reinstall any module temporarily removed. 3 When using key pins (provided with housing shipment), install them above and below housing slot selected for this module’s installation. 4 Insert module into housing firmly but carefully, seating edge connector in backplane. 5 Secure module to housing using captive slotted mounting screws at top and bottom of module front panel
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