The AH501 is combined Master Warning and Master Caution annunciator and combined with a high quality snap action alert acknowledgement switch. The AH501 allows the pilot to quickly recognize, acknowledge and mute new alerts and is ideally positioned directly in front of the pilot, just below the coaming for bringing alerts to your attention while keeping your head up.
The unit can be wired as a remote Master Caution and Master Warning Annunciator for common EFIS systems such as the Garmin G3X and Dynon. When combined with the Aero Safety Systems AH500 or AH502SD Central Warning Panel annunciators, it functions as a consolidating Master Caution/ Master Warning indicator and new alert acknowledge/voice mute switch as well as providing automatic dimming for night operation.
The unit measures 0.88in (22.2mm) square and has a panel depth of 2.4in (61mm) as detailed in the attached specification sheet. Captions are direct sunlight-readable, and supplied in both positive text (black text on illuminated background) and negative text (illuminated legend text on black).
The LEDs are high brightness and can be wired to PWM dimming, constant current or directly to 14V or 28V power with built in current limiting. The snap action momentary switch has double pole double throw connections.
* These require special fit captions and logic. For details, Email:
here or call for pricing.
Full direct-daylight readable display
Automatic variable dimming (when combined with AH500 and AH501)
Suitable for 50mA PWM constant current drive
Suitable for 13.5V direct drive
Triple-redundant high-MTBF LED arrays
DPDT momentary snap action switch
Aviation Red and Yellow
Lightweight, compact and easy to install
High quality design and construction
AH501 Master Caution
V LED Positive input
Warning LED array PWM current sink
Caution LED array PWM current sink
Warning LED array current limited sink (for 13.5V)
Caution LED array current limited sink (for 13.5V)
0.2” (4.5mm) travel at 2Ibs +/- 1Ibs (908g +/- 454g)
0.745” by 0.645” by 3.14” (19 x 16 x 80 mm)
Weight 0.8oz (28g)
Operating Temperature: -30 to +50 deg C (-22ºF to 122ºF)
Storage Temperature: -50ºC to 80ºC (-58ºF to 176ºF)
Humidity: <85% non-condensing
Vibration: 10-2000Hz (20g)
Ever missed something important in your cockpit checks or scan that could have put you in danger? With the ever-increasing pressures of flying in busy airspace, it's too easy to do. Military and commercial aircraft have sophisticated monitoring and warning systems which watch the pilot's back while he or she focuses on demanding flight tasks where 100% attention is required, inside or outside the cockpit. In light-sports aircraft or experimentals, system monitors and cockpit warnings are often a mixed bag of individual warning lights or indicators scattered around the cockpit where they happen to fit. And while flat-screen displays can show a multitude of systems data and warnings, these are often densely packed and over-complex and abnormalities are easy to miss. And what about those situations where your early attention might avert a worse one developing? An actual fire might be difficult to miss, but what about high oil temperature or CHT, being in the wrong configuration or over speed, or fuel or oil running low, or low volts or vacuum? Might it be helpful too to be prompted to put your pitot heat on when icing becomes a threat, or to put your oxygen on as cabin pressure falls? Depending on your aircraft type, there will be other potential killers that could sneak up on you unnoticed. You've spent a lot on your machine, so spending just a little more for a system that alerts you when things need attention and helps to keep you and those with you safe, makes good sense. Any examination of FAA accident reports illustrates the point well: even the most experienced professional pilot can mess up! So we part-time, low-flight-hour aces might just need a bit of extra help.