Garmin GDL 90 Installation Manual

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General Information1-4 560-1049-00 Rev B GDL 90 Installation Manual1.2.2.1 Multi-function DisplayThe GDL 90 is capable of driving one MX20 Display with traffic and weather information.1.2.2.2 Altitude EncoderThe GDL 90 is capable of interfacing to an altitude encoder to obtain altitude data via a RS232 bus.1.2.2.3 Annunciator Outputs and Switch InputsThe GDL 90 can drive one external annunciator lamp and receive inputs from various switches to controlits operation.1.2.2.4 Maintenance InterfaceThe GDL 90 has a RS232 communication port that is used to configure and check status of the GDL 90system. Refer to other sections of this manual for more description.1.2.2.5 Audio AlertThe GDL 90 has one 500 Ω audio output that can be connected to an audio panel to provide audiblemessages to the pilot. This is a future feature and currently not operational.1.3 SPECIFICATIONSThis section includes detailed electrical, physical, environmental and performance specifications for theGDL 90.1.3.1 ELECTRICALInput voltage.................................................. 10 - 40 VDCInput current (typical) ................................... 1.5 A at 14 VDC750 mA at 28 VDC1.3.2 PHYSICALHeight............................................................ 7.42 inches (18.84 cm)Width............................................................. 3.54 inches (8.97 cm)Depth............................................................. 12.64 inches (32.11 cm)Weight........................................................... 6.4 lb (2.9 kg) with mounting tray1.2 lb (0.54 kg) mounting tray only1.3.3 ENVIRONMENTALThe GDL 90 is designed and tested to meet appropriate categories as shown in the EnvironmentalQualification Form included in Appendix A.Operating temperature................................... -20°C to +55°CStorage temperature ...................................... -55°C to +85°C