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Alarm input interface circuits
Sensor device interface
circuit (Example 1)
Sensor device interface
circuit (Example 2)
VN-A1U
OUT
GND
OUT
GND
3.3 V
0.6 mA
DC 3.3 V
R
R
GND
GND
1.2
G
PULL UP
Relay, switch, etc.
Alarm input
equivalent
circuit
Recommended connection cable
Length
: 50 meters (194 feet) or less
Recommended cable type :
UL1007, UL1015 or
equivalent cable, which is
equivalent to a wire
specification of between
AWG#22 and AWG#18.