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The Carrier TB and TM Series Thermostats available in BACnet (TB series) or MODBUS (TM series) communication protocols come with a variety of options and features for a wide range of HVAC applications.
Carrier’s i‑Vu® ComfortVu™ TB/TM BACnet thermostats deliver reliable zone‑level HVAC control while integrating directly with BACnet building management systems. Designed for flexibility, they support both standalone operation and centralized control to help maintain comfort and energy efficiency across commercial spaces.
TB Series (BACnet MS/TP)
Options:
24 V, Temperature only
24 V, Temperature + Humidity + Motion
110–220 V, Temperature only
Communication: BACnet MS/TP (subordinate device)
Baud rates: Up to 76.8 kbps, automatically detected
TM Series (Modbus RTU)
Options:
24 V, Temperature + Humidity
110–220 V, Temperature only
Communication: Modbus RTU (server)
Baud rates: Up to 76.8 kbps, automatically detected
24 VAC ±15%, 4 VA (no load), 76 VA full load, or
110–220 VAC (model dependent)
Temperature
Range: 41–95°F (5–35°C)
Accuracy: ±1°F (±0.5°C)
Humidity (where applicable)
Range: 10–90% RH
Accuracy: ±3% typical
Motion (TB‑24‑HM models only)
Sensor type: PIR, quad, omnidirectional
Detection distance: 16.4 ft (5 m)
Detection range: 90° × 30° (H × V)
Inputs
T1: Dry contact (NO/NC), 0–10 VDC AI, or 50 kΩ thermistor @ 77°F (25°C)
RS‑485: A / B communication terminals
Power: C / R – 24 VAC
Outputs
DO terminals rated up to 3 A
Additional DO or AO outputs: 0–10 VDC, 5 mA max (not isolated)
The TB Series communicates via BACnet MS/TP, while the TM Series communicates via Modbus RTU.
No. They connect directly to BACnet or Modbus networks without additional gateways.
Yes. They are designed specifically for light commercial HVAC applications.
No. Humidity and motion sensing are model‑dependent features.
Get directed to our Business Development team to start the authorization process and discuss sales support.
Get specialized help with system sizing, load
calculation analysis, and technical data required for project design.
Request support for warranty claims,
scheduled maintenance, and genuine spare
parts ordering.
For more information : ahi@ahi-carrier.com
