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ID2000 Series Smart Code Reader User Manual
19
NPN Device
If the VCC of NPN device is 12 VDC or 24 VDC, and the pull-up resistor of the supplied 17-pin cable
is used.
DB9 Connector
NPN
Device
NPN Device Power
VCC
GND of VCC
Internal Resistor
of Cable
None-isolated
Input
Signal Line
NPN Power Ground
●
Figure 3-10 Input Signal Connecting to NPN Device (Pull-Up Resistor of 17-Pin Cable Used)
If the VCC of NPN device is 12 VDC or 24 VDC and the external pull-up resistor is used, it is
recommended to use 1 KΩ pull
-up resistor.
None-isolated
Input
DB9 Connector
NPN
Device
NPN Device Power
NPN Power Ground
Signal Line
VCC
GND of VCC
●
●
Figure 3-11 Input Signal Connecting to NPN Device (External Pull-Up Resistor Used)
Switch
The switch can provide low electrical level to trigger the bi-directional I/O.
None-isolated
Input
DB9 Connector
> 3.3 V
0 V
Figure 3-12 Input Signal Connecting to Switch