TEMA TELECOMUNICAZIONI SRL
Doorphone AA-514
MAS-AA514-REV03EN
Page 35 of 56
8.5.6. CASE 6: drive of an electric lock and automatic backlight D/N with powered system
Case in which with the same operating voltage of AA-514 you want to control the backlight of the keys through the
relay2 exploiting its special operating mode can be set using the parameter 144. Basically, the relay2 is activated
by the system each time it is set in Night mode. The contact of the relay 2 controls the switching of the lamps of the
buttons label holder. It is so possible to get a power-saving in Day mode and a pleasant backlight of the label
holders during the Night mode. It is also evident, with just a look at the doorphone for the last person that leaves
the company, to see if the system is correctly placed in Night mode. For this service is needed to bring the same
system power supply from TB1 to TB4 and then to establish a connection also between TB5 and TB3 as per
drawing. The telephone line must be connected on the TB2 terminal block. Caution: with the system set up in this
mode, the jumper "L" on the board must be left open.
In this example, the correct values of the parameters involved in the management of the relays could be:
•
parameter 138 = 0
the relay1 is activated by telephone code
•
parameter 144 = 2
the relay2 is activated if the system is in Night mode and deactivated in Day mode
Telephone
line
contact of relay2 of AA-514
used to automatically activate
(or not) the backlight in the
transition from Day mode to
Night mode (also connect
together the point 3 and 4 of
TB3)
Pedestrian gate
electric lock
Power supply
12Vac
Possible expansion
AA-516P or AA-516K
Wire to be connected on the point
TBE3.4 of expansion without
closing his jumper L.
