Charging control for storage heating systems and electric underfloor heating with DC control signal. It features a backlit touch display, four weekly time programs for comfort settings or as a substitute for a missing KU signal, as well as fault detection. Individual heating circuits can be switched off, with a switching capacity of up to 4.7 A/230 V. The reference DC value ranges from 0.91 to 1.43 V or -3.6 to 2.85 V. The heating curve is adjustable, with an extendable temperature range of 30 °C to 90 °C for residual heat and outdoor temperature-dependent charging of storage heaters. It allows for individual increases or decreases in day and night charging, and the sensor type is switchable, supporting all common types. It is designed for DIN rail mounting with a pitch of 3 units and has a protection class of IP 20 with appropriate installation. Note: NTC temperature sensors are not included.