HUST H2N Connecting Manual
3 - 6
• Input Board – NPN Type
Fig 3-6 is a standard NPN type input board. This board provides 24 input points
with LED indicators. When the input signal is correctly received, the
corresponding LED will be ON. Otherwise, check your program or connections.
Fig 3-6 HUST Input Board – NPN Type
LED
+24V
GND
I07
I06
I05
I04
I03
I02
I01
I00
I15
I14
I13
I12
I11
I10
I09
I08
I23
I22
I21
I20
I19
I18
I17
I16
72
64
155
147
DB25LF
Connecto
24V Power Input
GND
24V
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