DAC GDC31 - Serial Data Input; Roll Sum Steering Output; ARINC 429 Output; Reference Inputs

Equipment Installation Manual,
GDC31 Roll Steering Converter
Serial Data Input:
Format................................................RS232 or RS422 serial data in RNAV 0, RNAV 1, King 0 or
King 1 format from a GPS navigation system
Baud Rate...........................................Selectable (2400, 4800, 9600, 19200)
Roll Sum Steering Output:
Description.........................................Analog bank angle command with program pin selectable scale
factors to match most autopilot input levels. Program pin
selection for position based or rate based output. Program pin
selectable phasing.
Load ...................................................1K
ARINC 429 Output:
Labels.................................................Bank Angle Command, Label 121
Ground Speed, Label 312
Baud Rate...........................................-01 Low Speed (12.5kBaud)
-02 High Speed (100 kBaud)
Reference Inputs:
General Description...........................AC or DC excitation used to excite the heading bug on the HSI
or DG. The GDC31 uses the reference input to produce a
steering signal with correct phase and amplitude characteristics.
Two reference inputs are provided. Use only one, depending on
the autopilot type. The unused input will be a no-connect. See
typical interconnect diagrams later in this manual.
AP Ref 1.............................................Reference voltage input for use with gain settings found in
Table 1.
Maximum Input Level ..................42 volts peak (30Vrms)
Load: ...........................................60K
AP Ref 2.............................................Reference voltage input for use with gain settings found in
Table 2.
Maximum Input Level ..................15 volts peak (10.6Vrms)
Load: ............................................30K
1049-2510-01 G.doc
1049-2510-01
Rev G Page 10 of 47