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Handset

With this device, the user can operate all the functions of drives and slaves. Pressing a button generates switch signals which are converted into the corresponding control signals in the control unit. 
Cable handset (standard): 
The handset is connected directly to the control system via a connection cable; the switch signals are transmitted by wire. 
Infrared (IR): 
In place of the standard handset, an infrared receiver is connected to the control unit’s interface. The switch signals sent from the IR remote control unit are picked up by the receiver and transferred to the control unit. There must always be visual contact between the IR transmitter and the receiver, because data transfer takes place via light signals in the infrared range. 
Wireless (radio frequency): 
In place of the standard handset, a wireless receiver is connected to the control unit's interface. The switch signals transmitted by the wireless remote control unit are recognised by the receiver and transferred to the control unit. There must be no line of sight between the wireless transmitter and receiver, because data transfer takes place using radio waves.