Xinje XP-18 Series Operating Manual page 16

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Input points
Connect input point and com point with non-voltage point or NPN open collector transistor to
turn on the input.
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Input loop
The first loop and the second loop are insulated by optical coupler, the second loop has C-R
filter which can prevent wrong action caused by industry noise or input points oscillation. As
the result, there will be a response delay for 10ms to the input points. There is digital filter in
the input points.
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Input sensitivity
Input current is DC 24V 7mA. To make the input reliable, the ON current should be above
3.5mA, the OFF current should be below 1.5mA.
Typical connection
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