This document is the user manual for Delta Temperature Controller DTB Series and B Series. It includes precautions and safety warnings before use, recommended wiring methods, and installation environments. The temperature controller is protected by double insulation or reinforced insulation, equivalent to Class II of IEC 536. It is suitable for wire sizes from 2 mm2 to 24AWG. Users are advised to comply with safety regulations, ensure proper wiring and installation, and avoid electric shock and equipment malfunction.