CAREL DN33Z7LR20 PID Temperature Controller Universal

CAREL DN33Z7LR20 is a DIN-rail mounted universal PID temperature controller from CAREL's IR33 family, designed for compact, two-temperature-input control in HVAC, refrigeration, and light industrial equipment. It provides two temperature inputs and four relay outputs, enabling direct control of heating, cooling, dampers, and alarms in a single compact enclosure. The inputs are universal for temperature sensors and accept NTC and PTC thermistors, as well as PT1000 RTDs, offering flexibility to match a wide range of sensors and installations. The unit is powered from 12–24 V AC or 12–30 V DC and supports standard CAREL DIN-rail integration for easy panel assembly and maintenance. The controller uses PID control with autotuning to optimize regulation without manual retuning, improving response and stability across changing load conditions. With its DIN-rail footprint and the DN33Z7LR20 variant’s two temperature inputs and four relay outputs, it is suitable for multi-zone temperature control in commercial refrigeration, air handling units, and process equipment where programmable temperature regulation is required.