REVUE THOMMEN AG
CH-4437 Waldenburg
AD20 Standby Altimeter
Page 57 of 72
07-Sep-2009 Document No: AD-INSOP-800 Revision: 1.6
Table 4-13 Aircraft Type Selection
Depending on the selected aircraft the model number (parametric) shall be indicated during startup.
4.1.6.2.4 Discrete Outputs
No. Discrete Output Function Description Activation (default)
0 n/a No function --
1 Warning Flag Valid Output
Discrete WFVOUTD
indicates proper operation and
no critical failure
open = invalid condition
ground = valid operation
2 Battery Status Indicates status of emergency
battery
open = battery not active
ground = battery active
alternating 2 Hz = low power
warning
Table 4-14 Discrete Outputs
Note: The functions shall be assignable to discrete output pins by parameterization.
4.1.6.3 RS232 Serial Interface
The flight instrument has a RS232 interface for maintenance and calibration purposes only (there is
no real time data provided). This interface is not accessible for normal operation in the aircraft.
NOTE: The pins for RS232 TxD and RxD must be jumpered in the connector on the aircraft
side to avoid inadvertent interferences!
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