
RS485 Modbus RTU Communication for BMS Integration
Large Color Display with Capacitive Touch Interface
2-Pipe System Control (Heating/Cooling/Ventilation)
Energy-Saving Card Linkage (Window/Room Card Input)
Adjustable 3-Speed Fan and Auto Control
Supports Internal or External Temperature Sensor
The SAS923FCT is a high-performance, touch-screen thermostat designed for precise control of 2-pipe Fan Coil and DX units. Its primary strength is the robust RS485 Modbus communication protocol, enabling seamless integration into Building Management Systems (BMS) for centralized monitoring, data logging, and optimized energy efficiency in commercial settings.

Seamless BMS System Integration
Utilizes RS485 Modbus RTU protocol for real-time two-way data exchange with central building control platforms.
Intelligent Occupancy Management
Connects to room/window card inputs to automatically adjust or power down the unit when the space is vacant or a window is open.
Flexible Temperature Sensing
Allows configuration to use either the internal sensor for standard use or an external sensor for specific remote sensing applications.
Programmable Comfort Scheduling
Supports 7-day programmable scheduling to automatically adjust temperature setpoints based on the weekly occupancy plan.
Enhanced System Protection
Features built-in functions for pump protection and compressor delay to maximize the lifespan and reliability of the connected HVAC equipment.
Intuitive Touch Control Interface
Large color display with clear icons and responsive capacitive touch buttons ensures effortless local operation by the end-user.
| Model No. | Heat/cool | Cool only | Pipe | Speed fan | Programmable | Window card | Room card | External Sensor | Modbus RTU | WIFI | Power | Manual |
| SAS923FCT-CO-S-485 | √ | √ | 2 | 3 |
|
|
|
√ | √ |
|
220VAC | download |

Partnership & OEM/ODM Support
We commit to being your strategic partner in intelligent environmental control. Our comprehensive support system ensures your project achieves optimal performance, backed by specialized services, strong product quality, and reliable long-term support.
Fast Customization
Tailor the product appearance and functional parameters to perfectly match your project branding and specific application requirements.
Expert Technical Support
Dedicated engineering teams provide professional guidance and remote troubleshooting throughout the integration and commissioning phases.
Reliable Long-Term Support
A comprehensive product warranty and accessible service team ensure dependable, long-term product support and maximized system uptime.
8675561218391/2/3/4/5
info@saswell.com
