EMAXplus™: Specification

G1 and G2 Cirrus SR22 serial numbers 22-0435 to 22-1662 and SR20 from serial number 1337 until 1581 (basically all ‘non glovebox’ models with Avidyne PFD and MFD and the EMax engine monitoring option) are using the Avidyne SIU engine instrumentation data acquisition computer.
Later Entegra / „non perspective“ serials (‚glovebox models‘) use the Avidyne DAU for the same purpose.
SIU or DAU are converting electrical and engine parameters to digital information, which is then displayed by the MFD (and - in DAU aircraft – by the PFD).
In SIU aircraft the primary engine instrumentation required for certification (RPM, manifold pressure, fuel flow, oil temperature and pressure) is provided by the classical analog instruments on the right side of the instrument panel. Similarly the essential bus voltage and, selectable, alternator 1, 2 or battery bus load (amps) are indicated by analog instruments. Main and essential bus voltage are also converted by the SIU and displayed by the MFD. Due to design constraints bus loads are converted but not displayed on the MFD. The latter constraints are also resolved as part of the EMAXplus™ installation.
In DAU aircraft the classical instrumentation has been eliminated and the PFD/MFD serve as primary displays to meet the respective certification requirements. 

 

 

System: Microchip based protocol converter, interface unit and aural alerter
Interfaces: Dual RS232 ports, 5 digital inputs (0/28V), 1 digital input (push button switch) 2 digital outputs (28V LED lights), 1 Audio Output (500mV/500Ohm)
Voltage: 5 - 28V (max 40V)
Current: 30 mA (typical)
Environment: -40°C..+85°C (industrial temperature range)
Storage: -60°C..+90°C
Humidity: max. 80%, non condensing
Weight: 220g / 0.5lbs (processor unit)
Qualification: DO-160D (applicable subset)
DO-178B DAL D
Certification: EASA (minor change)
FAA STC for Cirrus SR20 and SR22 (pending)
Documentation: Installation Manual, POH/FMS Supplement,
Options: preconfigured wire harness, connector set
Installation: approx. 8 hours

EMAXplus™: Supported Features

EMAXplus™ supported features by type and serial number

 

Type Serial- Numbers Supported Features
SR20 (SIU) 1228 to 1336 AUDIO
FUEL
PITOT CAUTION
SR20 (SIU) 1337 to 1581 PFD DATA
AUDIO
FUEL
PITOT CAUTION
SR20 (DAU) 1582 and subs
w/ Entegra
AUDIO
FUEL
SR22 (SIU) 0278 to 0434 AUDIO
PITOT CAUTION
TKS (if installed)
SR22 (SIU) 0435 to 1601
1603 to 1643
1645 to 1662
PFD DATA
AUDIO
FUEL
PITOT CAUTION
TKS (if installed)
SR22 (DAU) 1602, 1644
1663 and subs
w/ Entegra
AUDIO
FUEL
TKS (if installed)

Disclaimer: EMAXplus is a product developed by and a trademark of simplyflying.com, all rights reserved. All specifications are subject to change without prior notification. Avidyne, EMax and Entegra are trademarks of Avidyne Corporation. Avidyne has asked to inform the public that it has not tested or certified the EMAXplus product. Cirrus is a trademark of Cirrus Design Corporation. All other trademarks mentioned are the trademarks of their respective owners.