Overview

The new, digital standby family features the company’s Attitude Indicator, Counter Drum Encoding Altimeter, and Airspeed Indicator. All three instruments are supported by an AML STC covering more than 180 aircraft models. The Digital Attitude Indicator, Counter Drum Encoding Altimeter, and Airspeed Indicator feature smooth, daylight-readable LCD graphics and a simple user interface. They are FAA TSO certified, RTCA DO-160G qualified, and RTCA DO-178C qualified to Design Assurance Level A.

Benefits

MD23-342 Digital Attitude Indicator:
Independent attitude without the need for GPS, magnetometer or airspeed.
Four primary functions: Attitude, slip, turn rate and heading
Heading with primary avionics via external ARINC input
Primary functions utilize modern solid-state MEMS gyro and accelerometer
Easy installation with user-selectable panel tilt and roll-offset
Fits standard 2-inch panel cutout
Rechargeable, field-replaceable emergency battery (available)
Lightweight — 0.4 lbs
Simple user interface — Single, push-and-turn control knob
Custom graphics, functions, inputs and outputs available
Daylight readable LCD and smooth, high-resolution graphics
Manual, external lighting control or built-in photocell for automatic dimming
Night Vision Integrated System (NVIS) compatible (available)
TSO certified to Design Assurance Level A
Designed and built in Wichita, Kansas, USA
Two-year limited warranty

MD23-215 Digital Counter Drum Encoding Altimeter
Operating range up to 55,000 feet
Configurable altitude units (feet or meters)
Baro setting synchronized via ARINC 429
Encoding outputs via ARINC 429 and Gray Code
Fits standard 2-inch panel cutout
Rechargeable, field-replaceable emergency battery (available)
Lightweight — 0.4 lbs
Simple user interface — Single, push-and-turn control knob
Daylight readable LCD and smooth, high-resolution graphics
Manual external lighting control or built-in photocell for automatic dimming
SSEC curve customized to match primary flight displays (available)
Night Vision Imaging System (NVIS) compatible (available)
TSO certified (Design Assurance Level A)
Designed and built in Wichita, Kansas, USA
Two-year limited warranty

MD23-225 Digital Airspeed Indicator
Configurable range markings eliminate the extra time and cost of mechanical range markings
Configurable range up to 500 knots (or MPH), range markings and dynamic MMO barber pole indicator
User-selectable Mach number display ON/OFF
Ground Speed and True Air Speed indication via ARINC 429
Fits standard 2-inch panel cutout
Rechargeable, field-replaceable emergency battery (available)
Lightweight — 0.4 lbs
Simple user interface — Single, push-and-turn control knob
Daylight readable LCD and smooth, high-resolution graphics
Manual external lighting control or built-in photocell for automatic dimming
Night Vision Imaging System (NVIS) compatible (available)
TSO certified (Design Assurance Level A)
Designed and built in Wichita, Kansas, USA
Two-year limited warranty

Specifications

MD23-342 Digital Attitude Indicator
Power Input	10–32 VDC
	0.14A @   28 VDC; 4 watts nominal
Data Input	ARINC 429: Low   or high speed; Labels 234, 235
	Pressure: Absolute/Static   (Quick Disconnect)
Data Output	ARINC 429: Low or high speed;   Labels 203, 204, 212, 217, 234, 235
	Gray Code
Operating Range	Attitude:   360° angle, 500° per second for pitch and roll (maximum)
Units of Measure	Altitude:   Feet or meters
	Barometric   Setting: Millibars (mb), hectopascals (hPa) or inches of mercury (in.Hg)
Lighting	5,   14, or 28 VDC external control or internal photocell for automatic dimming
Battery	Rechargeable, field-replaceable   emergency battery supply (available)
	P/N   6430006-(1)
	Technology:   Nickel-Metal Hydride (NiMH)
	Attributes:   0.25A @ 24 VDC nominal (6 Wh capacity)
	Runtime: 60 minutes @ 0.25A
Weight	0.4 lbs (0.17 kg)
Mounting	Rear panel mounted, (4) #6–32 screws, 2.25-inch round bezel
Dimensions	2.43″W x 2.43″H x 1.0″D (61.7mm x 61.7mm x 25.4mm)
Mating Connector	P/N 9019162-1: 26-pin, D-Sub electrical connector (Quick   Disconnect)
	P/N   9019162-2: Pneumatic fitting (Quick Disconnect)
Certification	FAA   TSO certified to C3e, C4c, C8e, C10c, C106, C113b, C201
	RTCA   DO-160G qualified
	RTCA   DO-178C qualified, Design Assurance Level (DAL) A
Rights	U.S.   Patent 11,048,389

MD23-215 Digital Counter Drum Encoding Altimeter
Power Input	10–32 VDC
	0.14A @   28 VDC; 4 watts nominal
Data Input	ARINC 429: Low   or high speed; Labels 234, 235
	Pressure: Absolute/Static   (Quick Disconnect)
Data Output	ARINC 429: Low or high speed;   Labels 203, 204, 212, 217, 234, 235
	Gray Code
Operating Range	-1,500 to + 55,000 Feet
Units of Measure	Altitude:   Feet or meters
	Barometric   Setting: Millibars (mb), hectopascals (hPa) or inches of mercury (in.Hg)
Lighting	5,   14, or 28 VDC external control or internal photocell for automatic dimming
Battery	Rechargeable, field-replaceable   emergency battery supply (available)
	P/N   6430006-(1)
	Technology:   Nickel-Metal Hydride (NiMH)
	Attributes:   0.25A @ 24 VDC nominal (6 Wh capacity)
	Runtime: 60 minutes @ 0.25A
Weight	0.4 lbs (0.17 kg)
Mounting	Rear panel mounted, (4) #6–32 screws, 2.25-inch round bezel
Dimensions	2.43″W x 2.43″H x 1.0″D (61.7mm x 61.7mm x 25.4mm)
Mating Connector	P/N 9019162-1: 26-pin, D-Sub electrical connector (Quick   Disconnect)
	P/N   9019162-2: Pneumatic fitting (Quick Disconnect)
Certification	FAA   TSO certified to C10c, C106, C113b
	RTCA   DO-160G qualified
	RTCA   DO-178C qualified, Design Assurance Level (DAL) A
Rights	U.S.   Patent 11,048,389

MD23-225 Digital Airspeed Indicator
Power Input	10–32 VDC
	0.14A @   28 VDC; 4 watts nominal
Data Input	ARINC 429: Low   or high speed; Labels 210, 312
	Pressure: Absolute/static and   differential/pitot (Quick Disconnect)
Data Output	ARINC 429: Low or high speed;   Labels 205, 206
Operating Range	Configurable   range of 160, 200, 300, 400 or 500 knots
Units of Measure	Knots   or miles per hour (MPH)
Lighting	5,   14, or 28 VDC external control or internal photocell dimming
Battery	Rechargeable, field-replaceable   emergency battery supply (available)
	P/N   6430006-(1)
	Technology:   Nickel-Metal Hydride (NiMH)
	Attributes:   0.25A @ 24 VDC nominal (6 Wh capacity)
	Runtime: 60 minutes @ 0.25A
Weight	0.4 lbs (0.17 kg)
Mounting	Rear panel mounted, (4) #6–32 screws, 2.25-inch round bezel
Dimensions	2.43″W x 2.43″H x 1.0″D (61.7mm x 61.7mm x 25.4mm)
Mating Connector	P/N 9019162-1: 26-pin, D-Sub electrical connector (Quick   Disconnect)
	P/N   9019162-2: Pneumatic fitting (Quick Disconnect)
Certification	FAA   TSO certified to C2d, C106, C113b
	RTCA   DO-160G qualified
	RTCA   DO-178C qualified, Design Assurance Level (DAL) A
Rights	U.S.   Patent 11,048,389

Features

• MD23-215 Digital Counter Drum Encoding Altimeter:
• - Vertical speed indicator (ON/OFF)
• - 6-second vertical trend (ON/OFF)
• - Altitude target (ON/OFF)
• - Approach minimums alert (ON/OFF)
• - Barometric setting (millibars, hectopascals or inches of mercury)