28
28
AsteRx-i UAS (PRELIMINARY)
28
Note that the 60-pin connector of the AsteRx-i OEM is not used by the UAS board.
Refer to the board schematics in section 5.5 and to the picture on page 20 for the pinout
of each connector.
5.2
Power Supply Options
When an USB cable is connected, the UAS board is powered from the computer through
the USB connector (J2).
Alternatively, the power can be applied from either:
•
Pin#1 of the COM1 connector (J3, or optionally with solder jumper J4 and J5)
•
An external 6-30V DC supply (J10).
Power can be applied from more than one source at the same time. On-board diodes
prevent short circuits (see schematics in section 5.5).
The UAS board provides the 3V3 supply to the AsteRx-i OEM receiver: there is no need for
a separate 3V3 supply for the receiver.
The UAS board provides a 5V DC voltage to the VANT pin of the AsteRx-i.
The power consumption of the UAS board is 150 mW (not counting the consumption of
the AsteRx-i OEM).
5.3
LEDs
The PWR LED is lit if the UAS board is powered and the supply voltage after the diode
selector is above 4V.
Refer to Appendix A for a description of the LOG and PVT LEDs.
5.4
Temperature Range
The interface board operates in the same temperature range as the AsteRx-i OEM (-40 to
85°C). Note that the VN-100 IMU has a reduced temperature range (see section 4.2).
5.5
Schematics
The UAS board schematics is shown below. Components printed as dashed lines are not
fitted.
