Description
Facilitating seamless bidirectional communication between machine controllers and field-level sensors, the Omron NX-ILM400 provides four independent IO-Link channels within a compact 12mm slice width. This module integrates directly into the NX-series Sysmac automation platform, offering real-time data ingestion and remote parameterization down to the component level. By leveraging photocoupler isolation between the internal logic circuitry and the field connections, it guarantees high noise immunity and stable communication in harsh electromagnetic environments.
Key Features
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Four IO-Link Ports: Supports simultaneous connections of up to four independent IO-Link sensors or actuators matching Specification v1.1.
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Screwless Clamping Terminal Block: Equipped with a 16-point push-in connection interface to minimize wiring time and prevent loose connections under high-vibration conditions.
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Synchronous I/O Refreshing: Uses Free-Run refreshing synchronized across the internal NX bus for deterministic control response.
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Advanced Diagnostics: Monitors and transmits status flags for short-circuits, connection anomalies, and component-specific configuration mismatches.
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Compact Form Factor: Modest 12mm width enables optimized high-density DIN-rail spacing within compact control cabinets.
Applications
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Industrial IoT & Smart Sensing: Aggregating diagnostic and process variable data from intelligent photoeyes, laser distance sensors, and pressure transmitters.
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Automated Packaging Equipment: Fast-paced line configurations where sensor parameters require dynamic adjustments based on product recipes.
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Material Handling Systems: Distributed conveyor systems utilizing multi-sensor routing arrays for positioning and object detection.
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Pneumatic Control Blocks: Directly monitoring flow rates and pressure configurations from intelligent IO-Link manifold modules.
Technical Specifications
| Parameter |
Specification Value |
| Manufacturer |
Omron |
| Model / SKU |
NX-ILM400 |
| Number of IO-Link Ports |
4 |
| I/O Refreshing Method |
Free-Run refreshing |
| I/O Connection Terminals |
Screwless clamping terminal block (16 terminals) |
| Isolation Method |
Photocoupler isolation |
| Insulation Resistance |
20 MOhm minimum at 100 VDC (between isolated circuits) |
| Dielectric Strength |
510 VAC for 1 minute, leakage current: 5 mA max. (between isolated circuits) |
| I/O Power Supply Method |
Supply from the internal NX bus |
| NX Unit Power Consumption (CPU Connect) |
1.05 W maximum |
| NX Unit Power Consumption (Coupler Connect) |
0.80 W maximum |
| Current Consumption (I/O Power Supply) |
50 mA |
| Dimensions (W x H x D) |
12 x 100 x 71 mm |
| Net Weight |
0.067 kg |
| Shipping Weight (Calculated) |
0.35 kg |
Connections and Interfaces
The 16-point screwless clamping terminal block is arranged to provide power distribution (L+ and L-) alongside signaling pins (C/Q and digital inputs) for each of the four physical ports:
| Terminal No. |
Signal Name (Left Row A) |
Terminal No. |
Signal Name (Right Row B) |
| A1 |
Port 1_L+ (Device Power +) |
B1 |
Port 2_L+ (Device Power +) |
| A2 |
Port 1_C/Q (IO-Link Communication) |
B2 |
Port 2_C/Q (IO-Link Communication) |
| A3 |
Port 1_L- (Device Power -) |
B3 |
Port 2_L- (Device Power -) |
| A4 |
Port 1_DI (Digital Input) |
B4 |
Port 2_DI (Digital Input) |
| A5 |
Port 3_L+ (Device Power +) |
B5 |
Port 4_L+ (Device Power +) |
| A6 |
Port 3_C/Q (IO-Link Communication) |
B6 |
Port 4_C/Q (IO-Link Communication) |
| A7 |
Port 3_L- (Device Power -) |
B7 |
Port 4_L- (Device Power -) |
| A8 |
Port 3_DI (Digital Input) |
B8 |
Port 4_DI (Digital Input) |
Alternative Models & Compatibility
The NX-ILM400 is fully compatible with Sysmac Studio engineering environments version 1.20 and above. It integrates into Sysmac architecture through direct connection to NX-series CPU modules or through EtherCAT Coupler modules (such as NX-ECC201 or NX-ECC202) and EtherNet/IP Coupler units. When upgrading legacy non-IO-Link digital modules, ensure the terminal block configuration is correctly updated in the controller I/O map to avoid diagnostic faults.
Application Pitfalls & Engineering Notes
A common design oversight involves exceeding the current carrying capacity supplied from the NX bus through the coupler. The NX-ILM400 draws 50 mA from the I/O power supply plus the total current required by all connected field-level IO-Link devices. If the cumulative sensor draw surpasses the output limit of your coupler unit, you must integrate an NX-PF0630 I/O Power Feed Unit immediately upstream of this module to segment and refresh the current path.
Commissioning & Wiring Tips
To protect sensitive communication channels from electromagnetic interference, ensure all IO-Link sensor cabling is shielded if run parallel to high-power motor lines. Strip conductors precisely to 8 to 10 mm when preparing wiring for the screwless terminal block. Solid wire or stranded wire terminated with non-insulated ferrules should be utilized to guarantee standard retention pressure within the 16 clamping terminals.
Installation Guidelines
CRITICAL WARNING
Ensure complete physical de-energization of the NX bus and field external power supplies before attaching, removing, or wiring any module. Failure to fully isolate electrical paths may cause permanent damage to the inner microprocessors of the module or the central controller.
1
Position the module correctly onto the standard 35mm DIN rail, ensuring the unit interlocking connectors slide cleanly into the adjacent module.
2
Press the module firmly down until the rear latching mechanism securely clicks and locks the unit to the mounting rail.
3
Insert pre-stripped wiring or ferrules directly into the screwless terminal clamp slots. Ensure each line corresponds with its mapped port pinout.
4
Power on the system backplane and use Sysmac Studio to scan the physical bus, register the unit, and map the corresponding IO-Link variable registers.