1. A commission device configured to commission load devices, which commission device comprisesa first transmitter configured to transmit an activation signal to a load device for activating this load device,
a second transmitter configured to transmit a number of challenge signals to the activated load device, which activated load device is configured to respond to the number of challenge signals by sending back a response signal per challenge signal to the commission device,
a first receiver configured to receive the response signals from the activated load device, and
a controller configured to determine time-intervals present between transmissions of the challenge signals and receptions of the response signals, which controller is further configured to derive a position of the load device from an analysis of the time-intervals.