Onyxx® LX BZ122

Configurable VAV Zone Controller

The BZ122-LX is a configurable, BTL-listed VAV controller built to the BACnet® MS/TP standard. This terminal unit has an extremely reliable integrated actuator and can be easily configured using a BACnet monitor, like the freeware Onyxx® LX UI (which requires a separate special USB adapter), or a Niagara host. The controller I/O profile includes 1 analog input, 2 analog outputs, and 2 Triac outputs, and it accepts up to 3 TZ room sensors.


  • Supports BACnet MS/TP
  • Has 1 AI/BI, 2 AOs & 2 BOs
  • Uses a pre-calibrated, precise digital MEMS Omron flow through airflow sensor.
  • Supports up to 3 TZ100-LX or TZ200-LX room sensors.
  • Requires Onyxx LX USB to RS-485 adapter to program with Onyxx LX UI
  • BTL Certified as a B-ASC (BACnet Application Specific Controller) BACnet is a registered trademark of ASHRAE. ASHRAE does not endorse, approve, or test products for compliance with ASHRAE standards. Compliance of listed products to the requirements of ASHRAE Standard 135 is the responsibility of BACnet International. BTL is a registered trademark of BACnet International.
  • To order use part number: BZ122-LX
  • WARNING: Internally, this device utilizes a half-wave rectifier and therefore can only share the same AC power source with other half-wave rectified devices.


This controller is designed to facilitate control and management of simple VAV equipment typically used in the HVAC industry. It allows powerful yet flexible solutions that can be tailored and sized according to any project need.