Rpm; Rpm 2; Manifold Pressure; Oil Pressure - Garmin G3X Installation Manual

18.3.2.4

RPM

The following sensors can be configured for the RPM 1 input on the GEA 24, or the RPM input on the
GSU 73:
• Electronic Ignition Tachometer Signal (1, 2, 3, or 4 pulses per revolution - Lycoming and
Continental electronic ignitions typically output 2 pulses/revolution for 4-cylinder engines and 3
pulses/revolution for 6-cylinder engines)
• Jabiru Alternator RPM (6 pulses per revolution)
• JPI 4208XX - Magneto Port RPM Sender (4- or 6- cylinder)
• Rotax Trigger Coil RPM
• UMA 1A3C Mechanical RPM Sender
• UMA T1A9 Magneto Port RPM Sender (4- or 6-cylinder)
Rotax 912iS: For the GEA 24, select "Rotax FADEC" as the RPM configuration to use engine speed data
from the Rotax 912iS FADEC interface.
NOTE
External components are required when using the Rotax Trigger Coil configuration with
the GSU 73 (see
18.3.2.5

RPM 2

A second RPM input is provided (RPM 2 input on the GEA 24, CAP FUEL 1 / RPM 2 on the GSU 73). If
both RPM inputs are configured, the highest of the two valid RPM values will be displayed. This
configuration is useful for aircraft equipped with dual electronic ignitions, where the tach signal ceases to
function during a pre-takeoff ignition check.
18.3.2.6

Manifold Pressure

The following sensors can be configured for the Manifold Pressure input on the GEA 24 or GSU 73:
• Kavlico P4055-30A
• Kavlico P500-30A
• UMA N1EU70A
Rotax 912iS: For the GEA 24, select "Rotax FADEC" for the manifold pressure configuration to use
manifold pressure data from the Rotax 912iS FADEC interface.
18.3.2.7

Oil Pressure

The following sensors can be configured for the Oil Pressure input on the GEA 24 or GSU 73:
• Kavlico P4055-150G
• UMA N1EU150G
Rotax/Jabiru oil pressure sensors: Rotax oil pressure sensor part numbers 456180, 956413, and 956415,
and Jabiru / VDO oil pressure sensor part number 360-003 (or similar VDO 0-5 Bar pressure sensor) are
supported. For the GEA 24, these sensors connect to the Oil Pressure Input and are configured using the
same page. For the GSU 73, these sensors connect to a general purpose (GP) input.
Rotax 912iS: For the GEA 24, select "Rotax FADEC" to use oil pressure data from the Rotax 912iS
FADEC interface.
NOTE
The Rotax 456180 and 956413 oil pressure sensors require an external resistor for proper
functioning (see
G3X Installation Manual - Engine/Airframe Sensor Configuration
Page 18-8
Figure G-3.1).
Figure G-2.1 for GEA 24 and Figure G-3.1 for GSU 73).
190-01115-01
Rev. L