Feedback or measuring signal input (PVin): PVin signal valve position signal (analog or linear resistance signal) sent by the implementing agencies display control device, or on-site measurement signal, PVin for universal indexing number to switch inputs. Feedback or measuring signal transmission output mA / V (PVout): PVout output signal to the previous stage regulator or DCS system, the system can monitor the actual valve position at any time or on-site measurements. Selection example: (1) WP-LE3IM-C2724HLT smart three-phase integrated power meter: LED three-screen digital display controller wholesale price, dimensions 80 × 160, RS - 485 communication, the way the transmission output (4 to 20) Quote mA display controller, three-phase four-wire input signal, the upper limit alarm alarm + switching power supply. Display control device manufacturers | Tianchang instrument linked instruments (certified) | display controller is provided by the United Instrument Sales Co., Ltd. Tianchang instrument. Tianchang instrument Alliance Instrument Sales Co. (www.ylybxs.com) (www.ylybxs.com) is Chuzhou, temperature instrumentation leader, over the years, the company is implementing the scientific management, innovation and development, the principle of honesty and trustworthiness, the maximum to meet customer needs. Tianchang instrument linked instruments in leadership with the staff warmly welcome all inquiries negotiations to create Tianchang instrument linked instruments a better future.