BAST-221C-B2

The BAST-221C-B2 wired thermostat model is BACnet MS/TP connected utilizing an EIA-485 serial connection.

The EIA-485 physical layer can be very effective. It offers the flexibility and convenience of a maximum segment distance of up to 1200 m /4000 ft. allowing for daisy-chaining of equipment on the same bus which makes it the perfect choice when long segments are necessary for the installation. Communicating at lower speeds also gives it the advantage of being more resilient to the noise present in industrial environments. EIA-485 wiring can be found in many existing buildings making it perfect for retrofit upgrades without the need to run new wires.

The BAST-221C-B2 includes a built-in temperature sensor, input for our remote temperature sensor, or temperature override via network command from the 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 or configuration changes. A digital display with graphical icons is easy to read and understand.

Specifications:

Functional:

• Compliance: EIA-485
• Protocols supported: BACnet MS/TP
• Cable length: 4000 ft/1200 m N/A @76.8kbps (max)
• Wi-Fi range: N/A
• Authentication: N/A
• Maximum Number of Devices: 32 MS/ TP devices (max)
• Temperature Display Range: 14 to 140°F (-10 to 60°C)
• Temperature Display Resolution: 0.1°F (0.1°C)
• Temperature Accuracy: ±1.8°F (±1.0°C) with all outputs of

Electrical:

• Input: AC only
• Voltage(V, ± 10%): 24
• Power: 5 VA
• Frequency: 47–63 Hz

Environmental/Mechanical:

• Operating temperature : 0°C to +50°C
• Storage temperature: −40°C to +85°C
• Relative humidity:5–95%, noncondensing
• Protection: IP30
• Weight: 0.44 lbs. (2 kg)

Warranty: 2 years

Certificates: CE Mark; RoHS