Carel md33d5en00 Controller

CAREL MD33D5EN00 MasterCella Wall PID Temperature Controller is a wall‑mount control device from CAREL’s MasterCella family designed for precise temperature regulation in commercial refrigeration and HVAC systems. It provides five input channels for temperature sensing (thermocouples or NTC sensors) and two 230 V AC relay outputs to switch compressors, fans, or valves. The unit operates on a wide 115–230 V AC supply and features a 200 × 240 mm front‑panel footprint suitable for compact control enclosures. As a PID controller, it applies digital control to maintain setpoints with stable response across multiple zones or processes, aligning with CAREL’s multi‑sensor control approach. Typical applications include display cases, cold rooms, condensers, and other modular refrigeration equipment that require coordinated temperature regulation from several sensing points. The MD33D5EN00 designation identifies a MasterCella PID temperature controller with this I/O configuration, and documentation from CAREL and distributor catalogs confirms its role in OEM equipment and service modules.