IR/DN33 Universal Thermostat
This series of “ universal ” thermostats can connect two temperature probes (NTC, PTC, PT1000). The second probe can be used for a second control loop, independent from the first, or alternatively for temperature compensation (summer or heating), differential operation (difference between the two temperatures), or free cooling. They feature two digital inputs that can be configured to manage functions such as an immediate external or delayed alarm, and remote ON/OFF. Programming is made extremely simple by the 9 selectable operating models (e.g.: direct, reverse, neutral zone, PWM, etc.). All controllers feature a PID algorithm with AutoTuning and some versions are available with RTC (real time clock). A low consumption switching power supply is used on both the 12/24 Vac/Vdc and 115/230 Vac versions.