FAAC MASTER-B Manual page 3

The battery supplied is a WORK BATTERY which directly powers the automated system.
It is not a back-up battery.
The battery is recharged by the MASTER-B or SLAVE-B control board to which it is connected via the transformer
and a specific integrated circuit. Bear in mind that it takes about 10 to 20 minutes of recharging to recover the
energy used during an opening/closing cycle (this value varies according to operating ambient temperature,
battery life and type of system).
At installation, the batteries, due to storage, may not be fully charged and thus enable the gate to operate only
a few times before discharging completely. That is why, before installing a new system, we recommend to fully
charge the supplied batteries, or provide at least two identical fully charged batteries. In this way, you will be
able to carry out the system programming operations and run the functional checks.
Charging can be done directly at the bench before the system is installed. Follow the instructions referring to
the figure below:
1) connect the SLAVE-B board (connector J2) to the MASTER-B board (terminals 6-15);
2) connect the secondary winding of the 12Vac transformer (supplied separately) to connector J2 of the
MASTER-B board and the primary winding to mains voltage;
Note: if not using the transformer supplied by FAAC, make sure that the secondary winding is 12Vac -
16VA.
3) connect the batteries to the J4 connectors on the MASTER-B / SLAVE-B boards and allow them to charge
for about 12 hours.
NOTE: While the batteries are being charged, LED P of the MASTER-B/SLAVE-B boards (see Fig. 15 and
para.12.2) may change from fast flashing light (a flash about every 250msec means the battery is
discharged) to steady light (battery charged).Even if the LED stays lighted steady a little while after you
start charging, leave the batteries connected for the whole of the indicated time.
SLAVE-B EQUIPMENT
Attention:
observe the indicated polarity on
the BUS connection.
Notes on work batteries
HOW TO CHARGE THE BATTERIES FOR THE FIRST TIME
16
MASTER-B EQUIPMENT