Network Communication UnitNU series


Communication Unit EtherNet/IP™ Compatible


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EtherNet/IPTM Compatible Network Unit


Compliant standards

IEEE802.3 (10BASE-T)
IEEE802.3u (100BASE-TX)
IEEE802.3af (c, Class 3)

Transmission speed

10Mbps (10BASE-T)100Mbps (100BASE-TX)

Transmission medium

STP cable or Category 3 or higher UTP cable (10BASE-T) *1
STP cable or Category 5 or higher UTP cable (100BASE-TX)

Maximum cable length

100 m (distance between the unit and Ethernet switch)


Max. number of connection stages

4 (10BASE-T) 2 (100BASE-TX)*2


Compliant functions

Cyclic communication
Compatible with UCMM and Class 3 messaging (Explicit messaging)

Number of connections


RPI (Transmission cycle)

0.5 to 10000 ms (in units of 0.5 ms)

Tolerable communication bandwidth for cyclic communication


Message communication

Supports UCMM, Class 3

Conformance test

Compatible with Version A7

Sensor connection

Connectable sensors

Sensor amplifi ers with N-bus support *3

Number of connectable units

Up to 16 units *4

Power supply

Power is supplied from the unit via a sensor amplifi er connection connector.

Allowable passing current

Total 1200 mA or less*5

Power during PoE power receiving

Supply voltage: 24 V ± 10 %, supply current: 360 mA or less *6*7

Indicator lamp

Link/activity indicator (LINK/ACT): green LED, module status indicator (MS): 2-color (green and red) LED, network status indicator (NS): 2-color (green and red) LED, sensor communication indicator (N-bus): 2-color (green and red) LED


Power voltage

24 VDC ± 10%, ripple (P-P) 10% or less (with power supply connector)
48 VDC (Max. 57 VDC) (During PoE power receiving)

Power consumption

1500 mW or less (60 mA max. at 24 V)*8

Environmental resistance

Operating ambient temperature

-20 to +55°C, No condensation

Operating ambient humidity

35 to 85% RH (No condensation)


10 to 55 Hz, 1.5 mm 0.06" double amplitude for 2 hours in each of the X, Y, and Z directions

Pollution degree



Main unit case and dust cover: polycarbonate, power supply connector: polyamide (plug), PBT (socket)


Instruction manual, power connector, 2 end units


approx 80 g (including connectors)

*1 When using the power PoE power receiving function, use the STP cable or Category 5 or higher UTP cable. 2. The number of connectable units is not limited when using a switch.
*2 When using the switch, there is no limit on the number of units that can be connected.
*3 “N-bus” is the name of KEYENCE's wiring-saving system for sensor amplifi ers.
*4 Depends on the sensor amplifi ers connected. 5. Value for the current which can be supplied to this unit or to a sensor amplifi er unit connected to this unit.
*5 This is the current that can be supplied to the main unit or to the sensor amplifier connected to the main unit.
*6 Varies according to the working ambient temperature. (-20 to 45°C: 360 mA or less, 45 to 50°C: 260 mA or less, 50 to 55°C: 140 mA or less)
*7 Power which can be supplied to the sensor amplifi er when using the PoE power receiving function. 7
*8 Current to be supplied to the connected sensor amplifi er is not included.

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