Garmin MX20 Installation Manual - 3  Specifications

Specifications 

MX20 Installation Manual 

45 

3  Specifications 

This section includes detailed electrical, physical, environmental, and performance specifications for the MX20.  

3.1  MX20 Features 

3.1.1  Display 

6" Diagonal, Color AMLCD Display 

640x480 Resolution (921,600 RGB Dots) 

65,535 Simultaneous Colors 

Direct Sunlight Readable 

Auto/Manual Dimming 

3.1.2  User Interface 

Back-lit, high tactile buttons 

Six general purpose "line select keys" 

Four general purpose "smart keys" 

Dedicated Function and Menu/Enter keys 

Front Panel Data-Card Access 

Open Software Architecture 

Field-Upgradeable Code 

3.1.3  Expansion/Internal Architecture 

Open software architecture 

Field-Upgradeable software 

PC-104/PC-104L expansion bus 

Four external high-speed serial I/O ports 

Four general purpose input flags 

3.1.4  Position Source 

Primary - External GPS or Loran via RS-232 serial input 

Optional internal GPS 

3.1.5  Electrical 

Table 3-1.  Unit Power Loads 

14 VDC 

28 VDC 

Unit 

Typical Max Typical Max 

MX20 

2.0 A 

3.0 A 

1 A 

1.5 A 

MX20 with heater 

(1)

3.0 A 

4.0 A 

1.5 A 

2.0 A 

MX20 I/O 

2.5 A 

3.5 A 

1.25 A 

1.75 A 

MX20 I/O with heater 

(1)

3.5 A 

4.5 A 

1.75 A 

2.25 A 

Notes:  

(1)

 Heater element turns on below approximately 30

o

C. MX20 with pushbutton power/brightness control does not 

have a heater.  

Note: Circuits should be protected in accordance with guidelines in AC 43.13-1B, chapter 11, section 2, 

paragraph 429. Power inputs should be across a minimum of all four specified input pins.