14
2-2-2 Wiring Precautions
• Do not make any mistake in polarity when supply DC power to the K3NR.
• Do not wire power lines alongside the signal lines of the K3NR in order to pre-
vent the K3NR from noise interference.
• Wire the terminal block with crimp terminals.
• Tighten each screw to a torque of 0.78 N S m (8 kgf S cm).
2-2-3 Wiring
Power Supply Apply 100 to 240 VAC or 12 to 24 VDC to terminals 8 and 9.
Open Collector Input Connect the pulse output from sensor A to terminal 1.
Connect the pulse output from sensor B to terminal 2.
Terminals 10 and 11 are exclusively used for a power supply with an output of
80 mA at 12 VDC to sensor A or B. If power is supplied to the sensor A or B from a
different power source, do not use terminal 10. Do not connect a sensor with
open collector output to terminal 10.
Refer to the following for sensor connections.
Sensor (with NPN output)
Sensor (with PNP output)
+12 V
+12 V
• Residual voltage with sensor turned on: 3 V max.
• Current leakage with sensor turned off: 1.5 mA max.
• Switching load current: 20 mA or greater. Must be able to dependably switch
a load current of 5 mA max.
Photoelectric sensors, proximity sensors, rotary encoders, and relays can be
connected as sensors to the K3NR.
Voltage Pulse Input Connect the pulse output of sensor A to terminal 3.
Connect the pulse output of sensor B to terminal 4.
Terminals 10 and 11 are exclusively used for a power supply with an output of
80 mA at 12 VDC to sensor A or B. If power is supplied to the sensor A or B from a
different power source, do not use terminal 10. Do not connect a sensor with
voltage pulse output to terminal 10.
Refer to the following for sensor connections.
Sensor
+12 V
H level (sensor output ON): 4.5 to 30 VDC
L level (sensor output OFF): –30 to 2 VDC
Auxiliary Power Supply Terminals 10 and 11 are exclusively used for power supply to sensors with an
output of 80 mA at 12 VDC ± 10%.
Input Block
Section 2-2
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