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 系列数字阀门控制器（图 1 和图 2）是基于微处理器的通信式电流到气动仪表。 除了将电流信号转换为阀位压力信号的传统功能外，DVC6000 系列数字阀门控制器使用 HART 通信协议，可以轻松访问对过程操作至关重要的信息。 这可以使用阀门或现场接线盒上的 375 型现场通讯器，或使用控制室内的个人计算机或系统控制台来完成。 使用 HART 通信协议，信息可以集成到控制系统中或在单个回路的基础上接收。

 

 

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 系列数字阀门控制器可用于单作用或双作用执行器。 数字阀门控制器接收阀门行程位置以及供应和执行器气动压力的反馈。 这使仪器能够诊断 W7957-1 / IL 图 1. DVC6010 型数字阀门控制器不仅安装在滑杆阀门执行器上，还安装在其安装的阀门和执行器上。 这为您提供了具备成本效益的维护信息，以便在真正需要时对仪器和阀门进行必要的维护。

 

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 系列数字阀门控制器使用两线制 4 至 20 mA 回路电源，因此接线很经济。 这提供了现有模拟仪器的低成本替代。 DVC6000 系列数字阀门控制器的两线制设计避免了单独的电源和信号接线的高成本。

 

Specifications / 规格

 

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 系列仪器（图 3 和 4）接收设定点并将阀门定位在需要的位置。

 

 

The input signal provides electrical power and the set point simultaneously. It is routed into the terminal box through a twisted pair of wires.

 

输入信号同时提供电力和设定点。它通过双绞线进入接线盒。

 

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.

 

然后输入信号被引导到印刷线路板组件，在该组件中微处理器运行数字控制算法，从而产生到 I/P 转换器的驱动信号。

 

The I/P converter assembly is connected to supply pressure and converts the drive signal into a pressure output signal.

 

I/P 转换器组件连接到供应压力并将驱动信号转换为压力输出信号。

  

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 输出被发送到气动继电器组件。该继电器还连接到供应压力，并将来自 I/P 转换器的小气动信号放大为单个较大的气动输出信号，供单作用执行器使用。对于双作用执行器，继电器接受来自 I/P 转换器的气动信号并提供两个气动输出信号。

 

The change in relay output pressure to the actuator causes the valve to move.

 

到执行器的继电器输出压力的变化导致阀门移动。

 

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.

 

阀门位置由仪器的行程传感器通过反馈联动感测。行程传感器与印刷线路板电连接，以提供用于控制算法的行程反馈信号。

 

The valve continues to move until the correct position is attained.

 

阀门继续移动，直到达到正确的位置。