I'm not sure on that specific model, but alot of those garaventa IPLs power all the boards and motors on the carriage with 12vdc through the hoist rope in the tube, and there is no other direct wiring connections to the board in the machine or hall stations, it uses radio waves to send data back and forth wirelessly. At least the older ones were like that.
The newer ones I think run batteries on the carriage and moved the motor onto the carriage, like a big stairlift (or savaria deltalift), but on those too I think the hall stations are wireless.