FIELDVUE DVC6000 Series digital valve controllers (figures 1 and 2) are communicating, microprocessor-based current-to-pneumatic instruments. In addition to the traditional function of converting a current signal to a valve-position pressure signal, DVC6000 Series digital valve controllers, using HART communications protocol, give easy access to information critical to process operation. This can be done using a Model 375 Field Communicator at the valve or at a field junction box, or by using a personal computer or a system console within the control room. Using HART communication protocol, information can be integrated into a control system or received on a single loop basis.
FIELDVUE DVC6000 系列數(shù)字閥門控制器（圖 1 和圖 2）是基于微處理器的通信式電流到氣動儀表。 除了將電流信號轉(zhuǎn)換為閥位壓力信號的傳統(tǒng)功能外，DVC6000 系列數(shù)字閥門控制器使用 HART 通信協(xié)議，可以輕松訪問對過程操作至關重要的信息。 這可以使用閥門或現(xiàn)場接線盒上的 375 型現(xiàn)場通訊器，或使用控制室內(nèi)的個人計算機或系統(tǒng)控制臺來完成。 使用 HART 通信協(xié)議，信息可以集成到控制系統(tǒng)中或在單個回路的基礎上接收。
DVC6000 Series digital valve controllers can be used on single- or double-acting actuators. The digital valve controller receives feedback of the valve travel position plus supply and actuator pneumatic pressure. This allows the instrument to diagnose W7957-1 / IL Figure 1. Type DVC6010 Digital Valve Controller Mounted on a Sliding-Stem Valve Actuator not only itself, but also the valve and actuator to which it is mounted. This provides you with very cost effective maintenance information, so that required maintenance can be performed on the instrument and valve when there really is a need.
DVC6000 系列數(shù)字閥門控制器可用于單作用或雙作用執(zhí)行器。 數(shù)字閥門控制器接收閥門行程位置以及供應和執(zhí)行器氣動壓力的反饋。 這使儀器能夠診斷 W7957-1 / IL 圖 1. DVC6010 型數(shù)字閥門控制器不僅安裝在滑桿閥門執(zhí)行器上，還安裝在其安裝的閥門和執(zhí)行器上。 這為您提供了具備成本效益的維護信息，以便在真正需要時對儀器和閥門進行必要的維護。
Wiring is economical because DVC6000 Series digital valve controllers use two-wire 4 to 20 mA loop power. This provides for low cost replacement of existing analog instrumentation. The DVC6000 Series digital valve controller’s two-wire design avoids the high cost of running separate power and signal wiring.
由于 DVC6000 系列數(shù)字閥門控制器使用兩線制 4 至 20 mA 回路電源，因此接線很經(jīng)濟。 這提供了現(xiàn)有模擬儀器的低成本替代。 DVC6000 系列數(shù)字閥門控制器的兩線制設計避免了單獨的電源和信號接線的高成本。
Specifications / 規(guī)格
Principle of Operation / 工作原理
DVC6000 Series instruments (figures 3 and 4) receive a set point and position the valve where it needs to be.
DVC6000 系列儀器（圖 3 和 4）接收設定點并將閥門定位在需要的位置。
The input signal provides electrical power and the set point simultaneously. It is routed into the terminal box through a twisted pair of wires.
輸入信號同時提供電力和設定點。它通過雙絞線進入接線盒。
The input signal is then directed to the printed wiring board assembly where the microprocessor runs a digital control algorithm resulting in a drive signal to the I/P converter.
然后輸入信號被引導到印刷線路板組件，在該組件中微處理器運行數(shù)字控制算法，從而產(chǎn)生到 I/P 轉(zhuǎn)換器的驅(qū)動信號。
The I/P converter assembly is connected to supply pressure and converts the drive signal into a pressure output signal.
I/P 轉(zhuǎn)換器組件連接到供應壓力并將驅(qū)動信號轉(zhuǎn)換為壓力輸出信號。
The I/P output is sent to the pneumatic relay assembly. The relay is also connected to supply pressure and amplifies the small pneumatic signal from the I/P converter into a single larger pneumatic output signal used by a single-acting actuator. For double-acting actuators, the relay accepts the pneumatic signal from the I/P converter and provides two pneumatic output signals.
I/P 輸出被發(fā)送到氣動繼電器組件。該繼電器還連接到供應壓力，并將來自 I/P 轉(zhuǎn)換器的小氣動信號放大為單個較大的氣動輸出信號，供單作用執(zhí)行器使用。對于雙作用執(zhí)行器，繼電器接受來自 I/P 轉(zhuǎn)換器的氣動信號并提供兩個氣動輸出信號。
The change in relay output pressure to the actuator causes the valve to move.
到執(zhí)行器的繼電器輸出壓力的變化導致閥門移動。
Valve position is sensed through the feedback linkage by the instrument’s travel sensor. The travel sensor is electrically connected to the printed wiring board to provide a travel feedback signal used in the control algorithm.
閥門位置由儀器的行程傳感器通過反饋聯(lián)動感測。行程傳感器與印刷線路板電連接，以提供用于控制算法的行程反饋信號。
The valve continues to move until the correct position is attained.
閥門繼續(xù)移動，直到達到正確的位置。
