AN-21 Annunciator Control Unit

The AN-21 is a light and warning tone generator for use in experimental aircraft. A total of twenty-one circuits can be monitored, sixteen channels are activated by ground and five by positive input. Each channel activates a light and emits a warning tone when triggered. The AN-21 also includes a Windows Programming Utility to enable the user to configure it for each specific installation. Each channel, when activated, has an associated user programmable output which can be programmed to do the following: Steady light, Flashing light, Alert Tone with steady or flashing light.