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NX-ECT101

NX-series EtherCAT® Slave Unit

NX-ECT101

High-speed data exchange based on EtherCAT

Item list of NX-ECT101

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last update: March 3, 2025

General Specifications

Item Specification
Enclosure Mounted in a panel
Grounding methods Ground of 100 Ω or less
Operating
environment		 Ambient operating temperature 0 to 55°C
Ambient operating humidity 10% to 95% RH (with no icing or condensation)
Atmosphere Must be free from corrosive gases.
Ambient storage temperature -25 to 70°C (with no icing or condensation)
Altitude 2,000 m max.
Pollution degree Pollution degree 2 or less: Conforms to IEC 61010-2-201.
Noise immunity Conforms to IEC 61000-4-4, 2 kV (power supply line)
Overvoltage category Category II: Conforms to IEC 61010-2-201.
EMC immunity level Zone B
Vibration resistance Conforms to IEC 60068-2-6.
5 to 8.4 Hz with amplitude of 3.5 mm,
8.4 to 150 Hz, acceleration of 9.8 m/s2
100 min each in X, Y, and Z directions
(10 sweeps of 10 min each = 100 min total)
Shock resistance Conforms to IEC 60068-2-27, 147 m/s2, 3 times each in X, Y, and Z directions
Insulation resistance Refer to the individual specifications of NX Units.
Dielectric strength Refer to the individual specifications of NX Units.
Applicable standards cULus: Listed (UL61010-2-201), EU: EN 61131-2, RCM, KC (KC Registration), and UKCA

Note: 1. The gravitational acceleration of vibration resistance and shock resistance is G=9.8m/s2.
　　　2. The specifications of insulation resistance and dielectric strength vary with NX Unit Models.
　　　3. Refer to the OMRON website or ask your OMRON representative for the most recent applicable standards for each model.

Individual Specifications

Item Specification
Transmission
specifications		 Communications
protocol		 EtherCAT protocol (only for slave)
Modulation Baseband
Baud rate 100 Mbps
Physical layer 100BASE-TX (IEEE 802.3)
Topology Depends on the specifications of the EtherCAT master *1
Transmission media Category 5 or higher twisted-pair cable
(Recommended cable: double-shielded cable with aluminum tape and braiding)
Transmission
distance		 Distance between nodes: 100 m or less
Send/receive
PDO data sizes *2		 • Data input by the EtherCAT master (TxPDOs)
1,204 bytes max.
• Data output by the EtherCAT master (RxPDOs)
1,200 bytes max.
Data size that can be exchanged between the EtherCAT master and CPU Unit
• TxPDO: 1,200 bytes max.
• RxPDO: 1,200 bytes max.
Mailbox Emergency messages and SDO requests
Mailbox data size • Input: 400 bytes max.
• Output: 400 bytes max.
Refreshing method Free-Run Mode
Setting range of
Explicit Device ID *3		 • Hardware switch setting: 1 to 255
• Software setting: 1 to 65,535
I/O refreshing method Free-Run refreshing
External connection terminals EtherCAT communications connector
• RJ45 × 2 (shielded)
• IN: EtherCAT input data, OUT: EtherCAT output data
Dimensions 30 × 100 × 71 mm (W × H × D)
Isolation method Between communications connector and NX bus: Pulse transformer
Insulation resistance 20 MΩ min. between isolated circuits (at 100 VDC)
Dielectric strength 510 VAC between isolated circuits for 1 minute at a leakage current of 5 mA max.
I/O power supply method No supply
Current capacity of
I/O power supply terminals		 Without I/O power supply terminals
NX Unit power consumption • Connected to a CPU Unit
1.75 W
Connection to a Communications Coupler Unit or a Communication Control Unit is not possible.
Current consumption from
I/O power supply		 No consumption
Weight 110 g
Installation orientation and
restrictions		 Installation orientation:
• Connected to a CPU Unit
Possible in upright installation.
Restrictions: No restrictions
Connection to a Communications Coupler Unit or a Communication Control Unit is not possible.
Circuit layout 3862_sp_2_1

*1. The EtherCAT Slave Unit conforms to the EtherCAT standards. Confirm the specifications of the connected EtherCAT master for the support topology. Note that the EtherCAT Slave Unit supports the ring topology.
*2. TxPDO is the data to send from the EtherCAT Slave Unit to the EtherCAT master. RxPDO is the data received by the EtherCAT Slave Unit from the EtherCAT master.
The following shows the contents of the TxPDO data.
· I/O data set from the CPU Unit to the EtherCAT master: 1,200 bytes or less
· Status to notify the EtherCAT master: 4 bytes or less
*3. The setting range of ID depends on the specifications of the connected EtherCAT master. Confirm the specifications of the EtherCAT master for the setting range of ID for the EtherCAT master.

last update: March 3, 2025

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