Alphatech Brave series User And Service Manual page 11

The wiring of relay contacts is explained in the next picture. The symbol
"NO" means contact normally open, "COM" means sharing output (central) and
"NC" means contact normally closed. The relay contact is isolated from the
other circuits on the board. For the variants of lock connection see the picture
below.
Power
supply
lock
Wiring of standard
7. A special USB cable enables the doorphone to be connected to a PC for
programming of individual parameters. A dedicated Windows program is
included on the CD (requires version W98SE or higher).
Under no circumstances use 120V or 230V direct current (DC)! This
can be solved by the use of contactors (power relays).
and
BRAVE SlimDP – User and service manual
Telephone
line
magnetic (inverse) lock
11