PNR220A

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PNR220A controllers are versatile instruments for liquid level, flow and pressure control. This controller is designed to accurately maintain the level, flow, or pressure of a liquid in a tank or container. The process is controlled by a pressure switch or a flow switch; the controller is also able to detect and respond to the change of the process variables such as differential pressure or temperature.

The PNR220A is designed to be used for both continuous and intermittent operation. The controller is equipped with four different control modes: manual, closed-loop level, closed-loop pump control, and proportional action. Different control modes may be selected depending on the requirements of the application.

In manual mode the controller can be used to start and stop a pump in response to a pressure switch. In closed-loop level control mode, the controller will adjust the pump speed to maintain the liquid level in the tank or container at the desired setting irrespective of changes in flow, pressure, temperature or other environmental factors. In closed-loop pump control mode, the controller will adjust the speed of the pump to maintain the desired flow rate. Finally, in proportional action mode, the controller will adjust the speed of the pump in response to changes in the process variables such as differential pressure or temperature. This mode is especially useful in applications which require more precise control of the liquid level or flow.

The PNR220A is equipped with a LCD display for visual feedback, and a digital input for connecting to external monitoring equipment. The controller is also equipped with a wide variety of programmable parameters, such as pump cycle time and loop gain settings, for setting up the controller to suit various applications. The controller also includes an RS-485 port for communication with a computer and a range of expansion modules for additional functionality.

The PNR220A controller is ideal for applications in industrial, agricultural and residential facilities. Its versatility makes it suitable for a wide range of liquid level and flow control applications, including water tanks, pumps, boilers and process control. The controller is easy to install and configure, and its advanced features ensure reliable and accurate operation.

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