12
7.2.4 REVERSE DIODE CONNECTION
If you connect an inductor (Door Locks or Alarm device) to the output relays, there will be a
high surge voltage created while the inductor is turning on and off. If you do not connect
reverse diode, the surge voltage will transfer and damage to the electronic circuit of the
controller. It is strongly recommended to add a reverse diode between the inductor coils to
absorb this surge voltage.
Figure: Reverse Diode connection
8. Installation
8.1 DIMENSIONS
Unit: mm(inch)
150mm (5.9 ”) x 120mm (4.72 ”) x 39.5mm (1.55 ”)
8.2 BACKUP BATTERY DIP SWITCH
Star 505R has a switch for the backup battery connection, which remains open circuit to prevent
any current consumption of the backup battery (Figure: Switch setting).
Before the Star 505R operation, it needs to be connected so that the backup battery can retain
the memory during power failure.
Figure: DIP SWITCH SETTING Figure: DIP SWITCH LOCATION