Schneider Electric (Viconics) VT8650U5000B Controller

The Schneider Electric Viconics VT8650U5000B is a specialized Fan Coil Terminal Equipment Controller designed for sophisticated HVAC applications requiring precise humidity control and BACnet MS/TP connectivity. Operating on an ARM Cortex architecture, this controller facilitates seamless integration into Building Management Systems (BMS). As a BACnet B-ASC certified device, it supports configurable sequences of operation for 2-pipe or 4-pipe fan coil units, including heat pumps and pressure-dependent VAV systems. This specific model features a high-definition color touchscreen but is the No PIR sensor variant, making it ideal for high-traffic zones where external occupancy sensors are already deployed. The VT8650 series utilizes a universal inputs/outputs strategy, allowing for remote room temperature sensing and discharge air temperature monitoring. Its advanced control algorithms optimize energy efficiency by managing staged heating and cooling cycles with high precision to maintain tight setpoint tolerances in commercial environments.

• Native BACnet MS/TP Integration: Enables direct communication with supervisory controllers without the need for additional gateways.
• Dehumidification Logic: Features an integrated humidity sensor to manage latent heat loads via dedicated dehumidification sequences.
• Customizable Interface: The color touchscreen allows for on-board configuration of control parameters, reducing the need for specialized software during commissioning.
• Versatile Compatibility: Supports a wide range of terminal equipment including modulating valves and multi-speed fan control.
• Simplified Wiring: Terminal blocks are clearly labeled to streamline the installation of analog inputs and binary outputs.

Can this controller be used for variable speed fan applications?
Yes, the VT8650 supports multi-speed fan control (Low/Medium/High) as well as ECM fan integration via 0-10V analog outputs for modulating fan speeds.

Is the firmware field-upgradable?
Schneider Electric allows for firmware updates via the USB port on the side of the unit, ensuring the application-specific controller stays current with the latest features.

How does this unit handle occupancy if there is no internal PIR sensor?
The unit can be wired to external occupancy sensors or receive BACnet network commands to transition between Occupied, Unoccupied, and Standby modes.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.