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Type 3:
Barrier open/close signal common =
+12V~+24V (V+)
.
Output signal type of barrier arm close position:
Active low
.
When barrier arm reach lowest (close) position:
Down Position
output signal
+5V~+24V -> 0V.
Type 4:
Barrier open/close signal common =
GND (0V)
.
Output signal type of barrier arm close position:
Relay output N.C.
When barrier arm reach lowest (close) position:
N.C.
->
Open
.
