Reverse Diode Connection - IDTECK Star iCON100SR User Manual

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. To protect this problem,
connect the reverse diode as the figure below.
It is strongly recommended to add a reverse diode between the inductor coils to a
bsorb this surge voltage. If you do not connect a reverse diode, the surge voltage
will transfer and damage the electronic circuit of the controller. 1N4004 – 1N4007
or equality efficiency diode is included in gift box.
Check Points during Installation p.19