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● Alarm input interface circuits
VN-A1U
DC 3.3 V
R
1.2
G
GND
Alarm input
equivalent
circuit
Recommended connection cable
Length
Recommended cable type :
3.3 V
: 50 meters (194 feet) or less
UL1007, UL1015 or
equivalent cable, which is
equivalent to a wire
specification of between
AWG#22 and AWG#18.
OUT
0.6 mA
GND
Sensor device interface
circuit (Example 1)
Relay, switch, etc.
OUT
GND
Sensor device interface
circuit (Example 2)
PULL UP
R
GND
19
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