BASstat BACnet Thermostats

Product Overview

The BASstat series of BACnet-compliant wired or wireless communicating thermostats ensure effortless integration into BACnet/IP (Wi-Fi) or BACnet MS/TP (EIA-485) networks. These thermostats are suited for single or multi-stage heating, cooling and ventilation binary output control applications such as RTU or AHU. Configurable control algorithm parameters allow adaptability to the specific application. Adaptive control algorithm applied to multi-stage on/off control saves energy and ensures seamless comfort for the occupants. Built in temperature sensor, input for remote temperature sensor, or temperature override network command from Building Automation System. Occupancy status can be set from thermostat buttons or over the BACnet network. Thermostat buttons are optionally lockable to prevent unauthorized control. Digital display with graphical icons is easy to read and understand.

Versatile Communication in Two Distinct Models

  • Both models are BACnet compliant with a B-ASC device profile
  • BACnet MS/TP in B2 model MS/TP baud rates 9.6kbps - 76.8kbps (BTL Listed)
  • BACnet/IP in BW2 model 802.11 b/g/n 2.4GHz Wi-Fi

Flexible Installation

  • 24VAC (+/-10%) power input
  • Digital Display with graphical icons of operation, °C or °F display
  • Single or Multistage, Binary Outputs for RTU or AHU applications
  • Manual or Auto-changeover modes as well as Heat only or Cool only modes
  • Occupied/Unoccupied modes with 2 sets of Cool/Heat set points
  • Effective run time accumulation for energy consumption calculations
  • Built-in temperature sensor
  • Remote temperature sensor input (NTC Thermistor 3kΩ)
  • Networked current temperature override from BACnet client (BMS)
  • Fully Configurable Algorithm control parameters: Deadband, Proportional Gain, Integral Rate, Stage Trip Points, Stage Widths, Short Cycle Delay, Maximum Cycles Per Hour
  • Non-volatile memory (EEPROM) retains user settings during power loss
  • Lockable buttons/user interface
  • Operating Environment: 0-50°C, 5-95% RH (non-condensing)
  • Wiring: 14 to 22 AWG wires or up to 2x 1.5mm wires
  • Dimensions: 94×118×34 mm (W × H × D)
  • Mounts directly onto wall, panel, standard 65×65 mm junction box (hole pitch 60 mm) or standard 2×4 inch vertical junction box (hole pitch 83.5 mm)

Product Details

The BASstat's white backlit LCD display is large and easy to read, even from a distance. It incorporates graphical icons to aid visual indication of current state of operation. Several icons indicate parameters such as: Active Mode, Cooling stage 1 or 2, Heating stage 1 or 2, Ventilation Only, Fan Active, Occupied/Unoccupied state, and Clock icon to indicate Short Cycle Delay or Max Cycles per hour active waiting state. These icons are very useful in indicating the thermostat's current state of operation.

Six buttons on the BASstat allow users to manipulate temperature set point, change HVAC modes, turn the thermostat ON/OFF, and more. Pressing the Set and Up/Down buttons can manually toggle the thermostat from occupied/unoccupied modes, where BACnet occupancy command is not an option. All 6 of these buttons are lockable in a configurable manner to prevent unauthorized configuration change. Some or all buttons can be locked for application flexibility, making the stat suitable for applications where limited user control is allowed.

Ordering Information

Model Description    
BAST-221C-B2 BACnet MS/TP Thermostat 2-Heat/2-Cool/1-Fan Wired $125
BAST-221C-BW2 BACnet/IP Thermostat 2-Heat/2-Cool/1-Fan Wi-Fi $150