80321S3312 NOVUS AUTOMATION

N321S RS485 Differential Temperature controller for Solar Heating The N321S is a purpose-built differential temperature controller engineered to maximize the efficiency and safety of solar water heating systems for domestic hot water and swimming pools. Its core function is to activate a circulation pump based on the precise temperature difference between the solar collector and the storage tank, ensuring energy is only used when the collected heat is sufficient. A key benefit is its integrated system protection; it actively prevents pipe damage from freezing during cold nights and protects against overheating, which can cause thermal discomfort and system stress. The controller comes equipped with two high-accuracy NTC sensors and features a clear 3½-digit LED display for real-time monitoring. Available in standard AC, 24V DC, and RS485 Modbus communication models, the N321S offers flexible integration for any installation. With its robust IP65 front panel and certifications (CE, UL), it delivers reliable, maintenance-free operation in diverse environmental conditions, ensuring your solar investment is both efficient and durable.Dual Integrated NTC Sensors: Includes two matched NTC thermistors for accurate differential temperature measurement between the collector and tank. Optimized Pump Control: Activates the circulation pump only when beneficial, maximizing solar energy harvest and reducing unnecessary pump operation. Essential System Protections: Built-in setpoints for freeze and overheat prevention safeguard the piping system and ensure user safety. Precision Calibration: Features sensor offset adjustment and configurable hysteresis for fine-tuning system response to specific installation conditions. Flexible Power and Communication: Available in universal AC, low-voltage DC, and RS485 Modbus models to suit any project requirement. Durable and Secure Design: IP65 front panel, silicone keypad, and password protection ensure reliable and secure operation in demanding environments.