550-445
BACnet ATEC I/O 2301, full feature (GDE)
The new Siemens BACnet ATEC provides high performance direct digital control (DDC) of pressure-independent and variable-air-volume zone-level routines. The BACnet ATEC can operate stand-alone or can be networked to perform complex HVAC control, monitoring and energy management functions and is designed to reside on any BACnet control system.

Siemens/西門子550-405N/550-445/550-440控制器