Honeywell Optimizer VAV Controller, 12 IO - VAA-VA75MB24NMC

The Optimizer VAV Controller, 12 IO by Honeywell is a programmable device featuring seven UIOs and five SSR (DOs). Noteworthy is its inclusion of two RS-485 ports, one designed for BACnet MSTP communications and the other for Modbus RTU integration. This controller also offers Bluetooth connectivity, allowing users to link up with the Honeywell Connect Mobile app and perform tasks such as VAV balancing.

The controller is equipped with an integrated 44 in-lb actuator and position feedback function. A key feature is its field replaceable differential pressure sensor with a capacity of 500 Pa and accuracy within +/- 3% of the full range. This intelligent device supports Honeywell Sylk wall modules, connecting seamlessly using the Sylk two-wire polarity-insensitive interface, eliminating the need for additional hardware I/O.

Moreover, this controller is equipped with engineering tools such as a function block library and sample application templates. They contribute to maintaining a uniform user experience across different operational levels, including the host room, plant controllers, and supervising units.