Conrad Electronic FS20 PIRI-2 Operating Instructions Manual page 18

You can even implement access authorisations; by assigning three gates to different single
addresses and a joint function group ('gates'), for example.
Several people can then each be given a hand-held transmitter with a relevant single address
for one garage door, while all the garage doors can be opened via a hand-held transmitter with
a programmed function group address or all the doors can be automatically closed in the
evening via a FS20 timer.
The various address types and addresses are only set on the transmitter and these settings
are transmitted to the receivers via the address assignment.
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