PID Controller for Controlling Gate Valves and Three-Position Valves RP1-3

The PID controller for controlling gate valves and three-position valves RP1-3 is designed to receive and convert signals from resistance thermometers (RTD), thermoelectric converters (TC), and sensors with unified current (AT) and voltage (AN) output signals into temperature values (or other physical quantities) displayed on built-in digital indicators, while simultaneously providing temperature control of objects according to the proportional-integral-derivative (PID) law.

The RP1-3 allows control of the electric actuator of shut-off control valves (SCV) or three-way valves regardless of their position using PID or pulse control laws.

The device automatically monitors the sensor status and ensures the measured temperature remains within the set measurement range.

Main functions of RP1-3:

• Measurement of temperature, humidity, pressure (or other physical parameters) of various objects via one or two channels using standard sensors:
  resistance thermometers [RTD], thermoelectric converters [TC],
  sensors with unified output current signals 0..5 mA, 0(4)..20 mA [AT], and
  voltage signals 0..1V, 0..10V [AN];
• Displaying current and set temperature values on built-in LED digital indicators;
• Control of physical quantity according to the proportional-integral-derivative (PID) law;
• Management of electric actuators for shut-off control (SCV) or three-way valves regardless of their position using PID or pulse control laws;
• Maintaining object temperature by PID control in a "heater-cooler" system;
• Ability to change set temperature values (setpoints) for the PID controller;
• Capability for automatic tuning of the PID controller coefficients;
• Data exchange with a personal computer via RS-485 interface;
• Two power supply modifications: from AC mains with nominal voltage 220 V or from DC source with nominal voltage 12..24 V;
• Light indication of device operating mode and formation of an "Error" signal.