English
15
INSTALLATION AND EXTERNAL CONNECTION
BYPASS DIODE CONNECTION
If you connected an inductor (door locks or alarm device) to the output relay, there should occur a surge voltage while the
inductor was turning on and off. If you do not connect a bypass diode to the relay, the surge voltage will cause damage to
the electric circuit of the controller. To reduce this surge, it is recommended to connect a bypass diode between the
devices.
Lock/Alarm
GND(-)
DC12V
Cathode
Anode
1N4004~1N4007 or equiv.
1
3
2
6
5
4
7
9
8
ESC
0
ENT
F
1
F
2
F
3
F
4
F
5
F
6
F
7
F
8
F
9
F10
F11
F12
Mon 12 / 12 / 2009
10 : 30 : 20
183
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