Sandel ST3400H HeliTAWS, Installation Manual

Page: 40 / 112

4.9 Electrical Characteristics by Signal Type
Inputs
Signal Type Nom Range Absolute
Max
Z (Ω – Power
Off)
A429 +/- 5Vdc 5.5Vdc >100K
A429* +/- 5Vdc 14Vdc >100K
A429** +/- 5Vdc 33Vdc >100K
RS232 +/- 10Vdc 14Vdc >100K
RS422 +/- 5Vdc 5.5Vdc >100K
RS422* +/- 5Vdc 14Vdc >100K
A407 (AC Synchro) 11.8Vac rms +/- 20% 14Vdc >100K
Discrete Valid (High) >14.0Vdc
Note 4
33Vdc >500K
Discrete Valid (Low) <3.5Vdc
Note 4
33Vdc >500K
Discrete (High) >1.2Vdc 33Vdc 50K
Discrete (Low) <8Vdc 33Vdc 50K
Vert LL Dev +/- 225mv FS 14Vdc
>300K
Note 2
Lat LL Dev +/- 225mv FS 5.5Vdc >300K
Note 2
Vert LL Flag Unflagged > 225mv 14Vdc >300K
Note 2
Lat LL Flag Unflagged > 225mv 5.5Vdc >300K
Note 2
Inverter
26Vac rms 400Hz nom
320Hz-480 Hz limits
42Vac
>50K
Power +22 to +30.3Vdc
Note 1
7Adc NA
Radalt +/- 30Vdc 33Vdc >100K
Ana +/- 13Vdc 14Vdc >100K
Outputs
Signal Type Nom Range Absolute
Note 3
Max
Load (Ω)
A429 +/- 5Vdc 70mAdc 2K (Minimum)
RS232 +/- 5Vdc 70mAdc 500 (Minimum)
Speaker Output 2W Nom 5W 4-8
Headphone Output 25mw/125mw 50mw/250mw >500
Open Drain
1
Ω
or High Impedance (over current
protected)
250mAdc >350K
Notes:
1.
At +28Vdc, nominal current is 1.25Adc +/- 10%, 1 minute after start up.
2.
Power On Load = 60.4K. For Vert/Lat Deviation there may need to be a 1K load somewhere else in the
system to meet the receiver load requirements. Check installation instructions for the interfaced receiver.
3.
Outputs are protected against shorts to ground. Shorts to power supply may cause damage to components.
82046-IM-K ST3400H INSTALLATION MANUAL Page 4-13