MS-VMA1620-1

Johnson Controls produces the MS-VMA1620-1 as a variable air volume (VAV) controller sensor. It is an integrated, programmable device that regulates the air volume and temperature in various zones or spaces in HVAC (heating, ventilation, and air conditioning) systems. The nominal supply voltage rating for the VAV controller is 24 volts AC, with a voltage range of 20 to 30 VAC. It has a maximum power consumption rating of 14 VA (volt-amp) and normal operating power consumption of 10 VA. This guarantees effective operation while reducing energy consumption. The MS-VMA1620-1 uses a DIP switch to address the controller, making configuration and integration into a BACnet MS/TP (master-slave/token-passing) communications bus system simple. As a result, its connectivity with other networked devices is made possible, enabling effective data sharing and management. The VAV controller's analog input features a 15-bit resolution, allowing for precise measurement and monitoring of input signals. The analog output, which delivers +/-200 mV precision in 0-10 VDC applications and a resolution of 16 bits, allows for fine control of the output signals. The controller has a single universal input that can function as a number of input types, including binary dry contact, 0-10 VDC, and 0-600 kilo-ohms. It also has two programmable outputs that can be set as 0-10 VDC or 24 VAC TRIAC, giving it versatility in controlling external devices. It also has three binary outputs, three of which are 24 VAC TRIAC outputs that are powered internally. The MS-VMA1620-1 is 182 mm in height, 182mm in width, and 64 mm in depth, and it weighs about 0.86 kg (1.9 lbs). Its installation is simple and can be mounted to a damper shaft with a single set screw or a duct with a single mounting screw.