When a RtR solenoid from raise and lower valve is connected to AUX 1, it is automatically activated using standard parameters.
When a Rtr solenoid from raise and lower valve is connected to AUX 1/2/3, use this function which add the possibility to modify the parameters
In cas a retarder axle is used on the trailer, use AUX 1/2/3 to send the "ABS active" signal from U-ABS to disengage retarder
For some markets, you can connect a trailer lamp on AUX 1/2/3 (for motor vehicles without ABS)
If you need a power supply for an external system, you can use this function on AUX 1/2/3 to use 24V from U-ABS (limited to 1amp)
Typical use is for steer axle lock, possible on AUX 1/2/3
On AUX 1/2/3, you can install a lamp on the trailer to show TPMS alerts