
TEMA TELECOMUNICAZIONI SRL
Doorphone AA-550
MAS-AA550-REV07EN
Page 31 of 67
8.5.3. CASE 3 – drive of two electric locks with system powered with 3 different power supplies
AA-550 activates the two separate electric locks and takes the power supply itself. Case with three different and
separate supply voltages. A first power source with a voltage of 12VAC is required for the system, a second power
source of 30V maximum for the first electric lock and a third power source of 30V maximum for the second electric
lock. Please note that not having been realized connections between different blocks (the system itself and the two
electric locks) the three power supplies provided to the system remain independent between them. Note the distinct
connections on the blocks TB1, TB3 and TB4. The LAN cable must be connected on TB2. The connections to be
made during the stages of installation are shown in dashed lines.Using the possibilities of connection of the power
supplies and loads offered by AA-550 it is possible to get a great flexibility of use in driving loads with different
electrical characteristics between them.
In this example the programming settings for the management of the relays could be:
the relay1 set as “Electric lock”, the relay2 set as “Electric lock”.
LAN network
cable
Pedestrian gate
electric lock
Driveway gate
electric lock
Hole for the release
of the connector
Two separate
power supplies for
the two electric
locks (Max 30Vac)
Power supply
12Vac for the
system