Legacy Unison Serial Access Protocol

The Unison Serial Access Protocol (USAP) is a protocol that allows a device capable of outputting RS-232 to interface with Unison lighting control.


  • Building management
  • AV system interface
  • Fire alarm interface
  • Relay system interface

Note that ETC does not provide programming. Those wishing to control Unison via the Serial Access Protocol must write the necessary commands.

Product Features

  • Activate or deactivate a preset
  • Record a preset
  • Change wall status
  • Set intensity level for a zone
  • Activate or deactivate macro
  • Bi-directional reply mode for status information