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Wiring Note:
※
Recommend: It is necessary to connect a diode in the output
end as means of preventing damage from the counter emf. If
your External Device is inductive Load, Ex. Relay…
To prevent the board damaged forever by overload, the
GND pins (CON1: pin 1/20, CON2: pin 1/ 20) all must be
connected with GND of External Power
.