Omron NX-ID - Page 121

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4 Installation and Wiring
NX-series Digital I/O Unit User’s Manual (W521)
4-4 Wiring Examples
4
4-4-1 Wiring the Input Units
The voltages and currents related to the conditions for NPN type sensors are shown in the figure
below.
The voltages and currents related to the conditions for PNP type sensors are shown in the figure
below.
V
CC
: Power supply voltage
V
R
: Sensor's output residual voltage
I
OUT
: Sensor control output (load current)
I
ON
: Input current of DC Input Unit (Input current when the rated voltage is applied)
R: Bleeder resistor
R
IN
: Input resistor of DC Input Unit
IN
IOG
IOV
IOG
IOV
V
R
V
CC
R
I
in
I
OUT
R
IN
Two-wire sensor
DC Input Unit
Communications Coupler Unit or
Additional I/O Power Supply Unit
I
OUT
IOG
IOV
IOG
IOV
IN
V
R
V
CC
R
I
in
R
IN
Two-wire sensor
DC Input Unit
Communications Coupler Unit or
Additional I/O Power Supply Unit