RDAC CAN dipswitch assignment
The RDAC CAN may be assigned as RDAC 1,2,3 or 4 by means of DIP switches 1 and 2.
Note: Odyssey/Voyager support only RDAC 1 and 2.
Switch
RDAC 1,2
RDAC 3,4
1
off or on
off
2
off
on
DIP switch 2 is used to select RDAC 3 or 4 unless “Both ECUs” is selected
Switch
3
off
Send data as RDAC 1 or 3 (depending on switches 1,2)
3
on
Send data as RDAC 2 or 4 (depending on switches 1,2)
The normal mode of operation is switch 3 “0ff”.
Dip switch 4 selects the ECU if not set to “Both Lanes”
4
off
ECU A, fall back to ECU B if ECU A fails
4
on
ECU B, fall back to ECU A if ECU B fails
Dip switch 5 selects “Exclusive lane mode”
5
off
Normal mode, use fall back in case of failure
5
on
Dedicate RDAC to Lane (Dip switch 4), never send data of other ECU.
Dip switch 6 selects “Both Lanes”.
6
on
Mode selected as above
6
off
Both ECUs. Dip switches 3,4,5 are ignored.
Typical connection for a UL Power engine (Single engine aircraft):
Switch 1 on. Switches 2,3,4,5,6 off. Data appears as two RDACs (RDAC 1 and RDAC 2) for
ECU A and ECU B. Configure the EFIS to show RDAC 2 data as needed.
Alternative:
Switches 1,6 on, switches 2,3,4,5 off
Data appears as RDAC 1. ECU B data will be sent if ECU A fails.
“Both ECUs” operation
The RDAC CAN behaves as two RDAC units (RDAC 1 and 2 or RDAC 3 and 4 depending on
switches 1 and 2).
ECU A is RDAC 1 or RDAC 3
ECU B is RDAC 2 or RDAC 4
If ECU A data fails, ECU B data is sent as ECU A (I.e. It is duplicated).
