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P-HC-BRC-10000000中間控制器
配置概述B814最初出廠時(shí)，所有八個(gè)通道都跳線用于常開配置您可以選擇連接任何常閉通道操作（如果需要）。這是通過將跳線從一個(gè)標(biāo)簽轉(zhuǎn)移到另一個(gè)在印刷電路板上。請(qǐng)參閱模塊側(cè)面的標(biāo)簽。下表顯示了設(shè)備的用戶配置接線/標(biāo)簽名稱。B814–108繼電器輸出模塊將來自PLC的信號(hào)轉(zhuǎn)換為8個(gè)獨(dú)立繼電器輸出。每個(gè)輸出都能夠驅(qū)動(dòng)繼電器、指示燈、電機(jī)起動(dòng)器、電磁閥或任何其他負(fù)載高達(dá)5.0 A。八個(gè)輸出中的每一個(gè)都是繼電器與I/O總線和其他七個(gè)輸出端電氣隔離線圈該模塊設(shè)計(jì)用于承受典型的工業(yè)浪涌電流荷載。
用戶可配置模塊的常開或常閉設(shè)置繼電器的操作如下所述，并與其他輸入兼容模塊。假設(shè)為常開配置，當(dāng)繼電器線圈通電時(shí)，繼電器觸點(diǎn)將電流從輸出A端子傳導(dǎo)到輸出B端子（參見下圖）當(dāng)電壓超過閾值電路電壓要求時(shí)，電流將通過精密衰減器流經(jīng)閾值開關(guān)和光隔離器橋式整流器。通過隔離器耦合的輸出脈沖是平均的，因此內(nèi)部電路通態(tài)條件的穩(wěn)態(tài)直流電壓表示由模塊邏輯側(cè)的Ourbus芯片（OBS）檢測(cè)。
Ourbus輸出寄存器被設(shè)置為表示字段打開狀態(tài)。
只要田地輸入狀態(tài)保持為真，模塊將在每次輸入時(shí)傳遞此狀態(tài)由PLC輪詢。B837–016 24 Vac/Vdc（真高）輸入模塊檢測(cè)到開和關(guān)輸入信號(hào)并將其轉(zhuǎn)換為Modicon PLC使用的邏輯電平。這個(gè)模塊的16個(gè)輸入分為兩組，每組八個(gè)通道與他人完全隔絕。
雖然這兩組都使用公共回路線，但沒有一組與系統(tǒng)接地，除非在用戶現(xiàn)場(chǎng)電路中建立。由于兩組名義上采用獨(dú)立的電源回流源，包括交流和直流電源電路可同時(shí)輸入模塊。
簡化示意圖以下是B837–016 24 Vac/Vdc（真高）的簡化框圖輸入模塊。
當(dāng)用戶的交流/直流電源勵(lì)磁電路接通時(shí)-由于限位開關(guān)例如，它顯示了模塊適當(dāng)輸入處的現(xiàn)場(chǎng)電源電壓頻道當(dāng)輸入電壓達(dá)到或超過模塊的保證值時(shí)閾值，產(chǎn)生的電壓打開通道監(jiān)控?zé)簦娏髁鲃?dòng)通過橋式整流器，然后通過光隔離器（opto-ISOL）電路。給定標(biāo)稱24 V現(xiàn)場(chǎng)電源和1000Ω最大輸入電源阻抗，當(dāng)對(duì)于高電平，電壓為20.4 Vac/19.2 Vdc；低電壓為6 Vac/10 Vdc分別調(diào)平。光能進(jìn)入通信板（COMMBOARD），其中Ourbus輸出寄存器被設(shè)置為表示現(xiàn)場(chǎng)電路開啟狀態(tài)只要字段輸入狀態(tài)保持為真，模塊就會(huì)通信控制器每次輪詢它時(shí)的狀態(tài)。
注：外部信號(hào)極性的反轉(zhuǎn)不會(huì)導(dǎo)致通道電路損壞，因?yàn)殡娐吩O(shè)計(jì)與意外極性反轉(zhuǎn)無關(guān)。
Configuration Overview
The B814 is initially shipped with all eight channels jumpered for the normally-open configuration. You may optionally wire any of the channels for normally-closed operation if desired. This is done by transferring a wire jumper from one tab to another on the printed circuit board. Refer to the label on the side of the module. The following table shows the user configuration wire/tab designations for the unit.
The B814–108 relay output module converts signals from the PLC to eight independent relay outputs. Each output is capable of driving a relay, pilot lamp, motor starter, solenoid, or any other load up to 5.0 A. Each of the eight outputs is electrically isolated from the I/O bus and from the other seven outputs by the relay coil. The module is designed to withstand the high surge currents typical of industrial loads. The module is user-configurable as to setting for normally-open or normally-closed operation of the relays as described below, and is compatible with other input modules. Assuming a normally-open configuration, when the relay coil is energized, the relay contacts will conduct current from output A terminal to output B terminal (see the following figure)When the voltage exceeds the threshold circuits voltage requirement, current will flow through the threshold switch and opto-isolator via the precision attenuator and the bridge rectifier. The output pulses coupled through the isolator are averaged so that a steady state dc voltage representation of the inner circuit’s on–state condition is sensed by the Ourbus chip (OBS) on the logic side of the module. The Ourbus output register is set to represent the field on state. As long as the field input status remains true, the module will communicate this status each time it is polled by the PLC.
B837–016 24 Vac/Vdc Input (True High), Overview
The B837–016 24 Vac/Vdc (True High) input module senses off and on input signals from its field circuitry and converts them to logic levels used by a Modicon PLC. The module’s 16 inputs are separated into two groups of eight channels, each group being totally isolated from the other. Although both groups use common return wires, none has a definite relationship to system ground unless established in the user’s field circuitry. Since both groups nominally employ independent power return sources, both ac and dc powered field circuits may input to the module at the same time. Simplified Schematic Diagram Following is a simplified block diagram of the B837–016 24 Vac/Vdc (True High) input module. When the user’s ac/dc powered field circuit goes on - as the result of a limit switch for example - it presents the field power voltage at the modules appropriate input channel. When the input voltage meets or exceeds the module’s guaranteed on threshold, the resulting voltage turns the channel monitor lamp on, current flows through the bridge rectifier and subsequently the opto-isolator (OPTO-ISOL) circuit. Given a nominal 24 V field power supply and 1000Ω maximum input source impedance, the module’s channel monitor lamps will indicate on and off when voltages are 20.4 Vac/19.2 Vdc for the high level on; and 6 Vac/10 Vdc for the low level off respectively. The optical energy goes to the communications board (COMM BOARD) where the Ourbus output register is set to represent the field circuit’s on state. As long as the field input status remains true, the module will communicate this status each time it is polled by the controller. NOTE: Reversal of external signal polarity will not cause channel circuit damage as circuit design is indifferent to accidental polarity reversal.
