Powered from 12 to 24 V ac/dc or by 115-230 V ac the units can also be used with transformers to for powering low voltage controllers from 110 V ac or 230 V ac. Featuring a simple user interface with a clear LED screen and large control buttons, the controllers are easy to commission as well as coming in a standard 76.2 x 34.2mm size suitable for a 71 x 29mm panel cut out. The IR33 series controllers feature two independent control loops and now with the addition of auto tuning and a real-time clock for cycle and alarm management, the IR33 range of controllers fare suitable for a range of applications. The IR33 series of universal electronic controllers from Carel are a panel mounted controller offering an updated and upgraded module to replace its IR32 predecessor.
