Efii BUS Manager

The EFII Bus Manager protects the 12 volt power supply to your critical systems. To have the most reliable system possible, the 12 volt supply to the critical engine electronics needs to be protected. The Bus Manager fulfills this important task of protecting the 12 volt power to these systems.

Anyone running critical engine electronics such as electronic ignition, or electronic fuel injection, or using glass panel (EFIS) or GPS systems should have some type of redundant electrical system for safe flying. The simplest and most cost effective way to do this is with the Bus Manager. The Bus Manager is also an easy way to eliminate brownout of electronic systems during engine starting. When your starter motor begins to spin the engine, the bus voltage for your panel instruments can dip to as low as 6 volts, causing brownout and reboot of your instrument panel electronics and your electronic ignition system. The Bus Manager prevents brownout and resetting of these systems during cranking.

The Bus Manager uses a two battery setup to provide a triple redundant Essential Power Bus to supply critical engine electronics. Basically, if there is 12 volts somewhere in the air frame, you will be able to get it to your critical electronics one way or another using the Bus Manager.

The standard Bus Manager installation uses two batteries and one alternator. A two battery, two alternator setup can also be implemented if desired.

The Bus Manager stops brownout during engine cranking! In the worst case, this can cause backfiring, reverse engine rotation, or starter breakage. If you have a Bus Manager, this is prevented. The primary battery is used for cranking the engine. The secondary battery will then provide a full voltage power source to the ignition and your EFIS while the engine is being started. This function is carried out automatically, without any pilot input required. Any additional equipment that is powered from the Essential Bus of the Bus Manager will also benefit from this protection.

The Bus Manager also provides a Main Bus power output to power all the other non critical systems in the aircraft. The Bus Manager can serve as a convenient power distribution center for all your aircraft systems.