Procon microsystems offers pid self-tuning temperature controller, the pxr4, with new and improved features as compared to fuji electric co ltd, japan. This 1/16 din temperature controller includes an led display that is 1.6 times larger than other previous models with dust-proof front display and operational section that is waterproof and conforms to nema-4x [ip66]. Both auto-tuning and the more advanced, self tuning functions calculate optimum pid parameters. Fuzzy control is a standard feature suppressing overshoot without lengthy start-up time and improving the response to external disturbances by quickly reverting to set points. A standard feature included in the pxr4 is the 16-segment ramp/soak. The digital input option that can be added to the pxr4 allows the operator to remotely change between two set points, start/stop the control action, start/reset the ramp/soak, start stop the auto tuning, cancel the alarm latch, or start the incorporated timer. The pxr4 controller offers additional options such as: timer function, heating/cooling control, heater burnout alarm, and the free, standard 16-segment ramp/soak function feature. Relay, ssr driver and 4-20ma outputs may be chosen. The pxr4 accepts temperature and process inputs, and offers two control output alarms and two programmable alarms. Daisy-chaining up to 31 controllers on an rs-485 network is an option with the pxr4. Using a pc, the operator is then able to monitor all 31 controllers via the industry standard modbus communications protocol. It comes with a one year warranty and complete technical and support services for the lifetime of the product.
