The NT800 Series networking LCD room thermostats are BACnet Master-Slave/Token-Passing (MS/TP) networked devices designed in strict accordance with ASHRAE standard 135-2001 and are considered “native” BACnet devices. These thermostats provide line voltage or   24-VAC on-off control or 3-wire floating or 0-10 VDC output to control valves in 2-pipe or 4-pipe fan coil units.