(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.
Wiring of standard and magnetic (inverse) lock
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).
2.1.4 Switches
8. The switch marked HEAT (see figure –
8) activates heating of the PCB. This is
for
increased
resistance
against
humidity. To use this feature you must
connect an external 12V power supply.
9. The switch marked SERVICE (see
figure – 9) is required for programming
the unit when the password is forgotten.
It is performed by ordinary phone
(DTMF – tone dial ).
The switch is
Power
supply
lock
Telephone
line
