AH502SD PROGRAMMABLE VOICE AND LEGEND ANNUNCIATOR
The AH502sd combines flight, engine and aircraft configuration data to generate voice and visual alerts.
The unit is programmed to warn off against switched, analogue and EFIS data inputs based on the switched state, value threshold or combinations of inputs to generate envelope alarms.
Envelope alerts could include oil pressure profiles, speed/ configuration envelopes, gear not down and oxygen alerts.
Data is gathered from directly connected switches and analogue inputs as well as being able to take flight and engine data from Electronic Flight Information Systems (EFIS) and Engine Monitors when available via serial buses.
Alerts are mapped to custom voice and/or sunlight readable and auto dimming captions with integration to a remote Master Caution, Master Warning and alert acknowledgement switch.
The front mounted SD card allows for easy adjustment of programming and voice files.Description Gallery Features Benefits In the Box Downloads Q&A
A configuration file defines the alerts by applying logic to defined states, threshold values or an envelope of flight, engine or aircraft configuration data.
A basic implementation example may include Oil Pressure, Oil Temperature, Low Fuel, Alternator, Starter, Doors and Hatches, Gear unsafe, Voltage and Alternator alerts. These basic alerts can all be generated using directly connected switched and analogue inputs. A simple configuration file maps these to the illuminated captions and voice alerts and consolidates alerts into a Master Warning/ Caution switch.
More advanced alerts can be generated when flight and engine data is added through connection to an EFIS or engine monitor. By combining aircraft configuration data with flight and engine data, Envelopes and Profile alerts can be generated. Examples include recognizing that the landing gear should be down based on airspeed, rate of descent and Height AGL, that oil pressure is too low for the current RPM, that airspeed is outside of the envelope for the current aircraft configuration or that oxygen should be on above a specified altitude.
Careful thought has gone into human factors with auto mute on startup to keep the cockpit quiet when you turn on the master switch and adjustable damping on alert triggers to prevent transitory events causing unnecessary alarms. If your EFIS data feed is off or faulty, the system generates a voice alert to let you know.
The optional AH501 Master/Caution attention-getter / acknowledgement switch helps to draw the pilot’s attention to an anomaly, its switch turns unacknowledged captions to steady and mutes the audio.
Custom legends, voice alerts and basic configuration are all included.
The unit measures 10.8in(275mm) by 0.67n(17mm) and has a panel depth of 1.35in(34mm) as detailed in the Panel Drawing and Installation sheet.
Configurable and programmable captions
Configurable and programmable captions
Slim panel depth, high quality aluminium enclosure
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 GA, light-sport aircraft and 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.
Questions & Answers
The AH500 family instruments are designed and tested for experimental and light sport aircraft applications. We are working towards achieving approvals for certificated GA aircraft and please get in touch if you would like to support our application for STC or have an interest in certified equipment.
Each legend and voice alert is driven by logic defined in a custom configuration file. Inputs are taken from serial data interfaces with common EFIS and engine monitoring equipment as well as directly connected analogue and digital inputs and ‘mapped’ through programmable logic to legends and voice alerts.
The logical mapping allows IF, AND, OR, GREATER and LESS commands allowing both simple alerts and more complex ‘envelope’ alerts to be generated.
A simple alert could be generated using Garmin G3X fuel level data to generate a left or right low fuel visual and audio alert when fuel level falls below a specified value.
A complex ‘envelope’ alarm could be RPM dependent Low Oil pressure where an allowable oil pressure profile is programmed depending on RPM.
Both AH500 and AH502 have a number of directly fed digital and analogue inputs as well as one or two RS232 serial data interfaces that allow the unit to capture multiple variables and states to create sophisticated alert logic.
Each legend is a separate lens that is etched to produce your custom text.
Custom audio clips are mapped through the logic. Multiple audio files can be associated, through different logic scripts, to the same legend.
e.g. a “CHECK DOOR” legend can be generated using a number of directly connected digital inputs to generate multiple audio files for the same legend, e.g.
“Warning. Pilot Door is not closed” as well as “Warning. Co-Pilot Door is not closed” etc…
Voice alerts can even be generated without having an associated legend, allowing for more alerts than the available legends.
Charges for custom configuration are typically free of charge for simple configurations provided a completed order form is provided at time of order. Complex logic implementations will attract a fee. Please contact us through the support form with information about your requirements and we will confirm.
Pilots of military and commercial aircraft recognise the benefits of having a custom centralised warning system with integrated master caution. Alerts are prioritised, clearly presented, consistently voice annunciated and can be acknowledged.
Alerts are otherwise scattered between EFIS, EMS and other indicator systems, the pilot may mis an alert or not know where to look when an audio alert is generated.
The AH500 family of warning systems cleverly allows installers to create a custom system at prices suitable for the general aviation market. It produces intelligent alerts which combine multiple data and present the alerts in a single centralised and prioritised visual and audio interface.
Sensors do not need to be replicated since the AH500 Central warning systems collect data from existing data sources with serial data connections available to Garmin, Grand Rapids, Electronics International, Dynon (among others) EFIS and engine monitoring systems.
The AH500 and AH502 connects over RS232 to most EFIS and Engine Monitoring systems including Garmin, Grand Rapids, Dynon and Electronics International.
Through the XML configuration file, the data published on these systems busses can be mapped through logic to the voice and visual alerting system.
Please contact us through the support form with information about your requirements and we’ll confirm compatibility.
It is recommended that an avionics installer installs the unit. We provide information within this website and provide free of charge support to assist in configuration and installation by telephone and email for installers in the USA and Europe.
Aero Safety Systems is developed and manufactured at Daedalus airfield in Hampshire, UK.
We are a team electronics, embedded software, mechanical and aerospace engineers with a background in critical applications engineering design. We are all passionate about aircraft, and our team includes pilots with military, test pilot, and general aviation backgrounds.