AS-UNT120-1

The Johnson Controls AS-UNT120-1 Unitary Controller is a specialized device designed for controlling and regulating heating systems in low-temperature environments. This controller operates with a power requirement of 24 VAC at 50/60 Hz, drawing about 10 VA (400 mA) for UNT models with sensors/transmitters. For the UNT120/121 model equipped with a heater, the power draw increases to 25 VA due to the heating element. The unit is engineered to function effectively within a wide range of ambient operating conditions, with a temperature range of 0 to 52°C (32 to 125°F) and a humidity level of up to 90% RH. Furthermore, it can endure more extreme conditions during storage, with a range of -40 to 70°C (-40 to 158°F) and humidity levels ranging from 10% to 90% RH. In terms of physical dimensions, the controller measures 165 x 163 x 56 mm (6.5 x 6.4 x 2.2 in.) without the enclosure (ENC), and 173 x 185 x 119 mm (6.8 x 7.3 x 4.7 in.) when equipped with the enclosure. The unit's shipping weight is 0.64 kg (1.4 lb), contributing to its portability and ease of installation. The AS-UNT120-1 employs a capable processor, the 80C652, along with a memory configuration of 32K RAM, 64K ROM, and 8K EEPROM. It interfaces seamlessly through N2 and Zone Bus protocols, ensuring effective communication with other components within the system. Compliance with industry standards is a key feature of the controller. It adheres to various standards, including IEEE 472, IEEE 518, IEEE 587 Category A, FCC Part 15-, Subpart J- Class A, UL 916, and UL 864. It holds agency listings as both UL-listed and Certified, making it a reliable and safe choice within the Metasys Network. In conclusion, the Johnson Controls AS-UNT120-1 Unitary Controller is an advanced solution tailored for efficient control of low-temperature heating systems. Its robust design, adherence to industry standards, and flexible interfacing capabilities contribute to its effectiveness in creating comfortable and regulated indoor environments.