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Omron NX-AD3603 NX Series 4-Channel Analog Input Unit

Omron NX-AD3603 NX Series 4-Channel Analog Input Unit

Only 8 item(s) left in stock
  • Manufacturer: Omron

  • Product No.: NX-AD3603

  • Country of origin:Japan

  • Product Type: Analog Input Units

  • Payment: T/T, Western Union

  • Weight: 70g

  • Dimensions: 12 mm x 100 mm x 71 mm

  • Shipping port: Xiamen

  • Warranty: 12 months

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Description

Facilitating high-speed analog-to-digital conversion within Sysmac automation architectures, the Omron NX-AD3603 accepts four channels of single-ended voltage signals for real-time PLC processing. This high-density analog input module operates seamlessly on the NX bus, providing fast signal acquisition for motion control, process monitoring, and general industrial automation applications. Utilizing a tool-free push-in terminal design, it reduces field deployment time while maintaining high electrical connection stability under vibrational stress.

Key Features

  • Four single-ended analog input channels configured for bipolar voltage signals.
  • Wide signal input range covering minus 10 V to plus 10 V.
  • High conversion speed of 250 microseconds per point.
  • Integrated 12-terminal push-in, screwless clamping terminal block for tool-free field wiring.
  • Supports Free-Run I/O refreshing for continuous, non-synchronized update cycles.

Target Applications

  • Feedback signal processing for variable frequency drives (VFDs) and servo systems.
  • Pneumatic and hydraulic proportional valve voltage feedback loop integration.
  • High-speed industrial measurement and automated test stations.
  • Data acquisition systems for external environmental sensors.

Technical Specifications

Specification Parameter Value / Rating
Manufacturer Omron
Model Number NX-AD3603
Number of Points 4
Input Range minus 10 V to plus 10 V
Resolution 1/8000
Conversion Time 250 microseconds / point
Input Method Single-ended
I/O Refreshing Method Free-Run refreshing
Accuracy (at 25 degC) plus/minus 0.2 percent (full scale)
Accuracy (0 to 55 degC) plus/minus 0.4 percent (full scale)
Input Impedance 1 MOhm minimum
Absolute Maximum Rating plus/minus 15 V
Isolation Method Between input and NX bus: Transformer (Power), Digital Isolator (Signal). No isolation between inputs.
Insulation Resistance 20 MOhm minimum (at 100 VDC) between isolated circuits
Power Consumption 1.35 W maximum (connected to CPU); 1.10 W maximum (connected to Coupler)
Terminals 12-terminal screwless clamping terminal block
Dimensions (W x H x D) 12 mm x 100 mm x 71 mm
Unit Weight 0.07 kg
Shipping Weight (Calculated) 1.00 kg

Empirical Engineering Insights

Alternative Models & Compatibility

The NX-AD3603 is optimized for bipolar voltage applications (minus 10 V to plus 10 V). If your deployment requires differential inputs or higher input-to-input isolation, consider the NX-AD3203 which offers differential input structures. This module is compatible with all Omron NX-series CPU units, EtherCAT Coupler Units, and EtherNet/IP Coupler Units. Parameter configuration must be managed through Sysmac Studio software.

Application Pitfalls & Engineering Notes

Because this module utilizes a single-ended design, all four input channels share a common internal signal ground (no isolation between individual input channels). Ground loops can easily develop if the external sensors are connected to different ground potentials. To prevent measurement errors or damage to the module, ensure all signal grounds are referenced to a single common system point or use external signal isolators on individual lines.

Commissioning & Wiring Tips

Always use shielded twisted-pair cables for analog signal connections to suppress high-frequency noise from nearby variable frequency drives. Ground the cable shield exclusively on the panel enclosure side (single-point grounding) to avoid circulating ground currents. For the screwless clamping terminals, use ferrules with an insulation sleeve length of 8 mm to 10 mm to ensure stable physical insertion.

Installation Guidelines

CRITICAL WARNING

Disconnect all electrical power supplies from the NX bus, the auxiliary I/O power, and the field devices before attempting module installation, removal, or manual wiring. Failure to completely de-energize the entire system may result in structural damage to the NX bus interface connectors, corrupt internal parameters, or cause electrical shock.

1

Align the top and bottom guide hooks of the NX-AD3603 module with the track of the adjacent module on the DIN rail.

2

Slide the module straight toward the adjacent unit until you hear a distinct click, confirming that the NX bus connectors are fully engaged.

3

Insert your pre-stripped wires or ferruled connections directly into the screwless clamp terminals until the clamp locks. Verify physical connection security with a gentle pull-test.

What is the key difference between the NX-AD3603 and standard differential analog input units?

The NX-AD3603 features a single-ended input method, meaning all 4 channels share a common internal ground. Differential units like the NX-AD3203 have separate positive and negative reference pins for each channel, providing better protection against ground loops.

Does the NX-AD3603 require an external 24 VDC I/O power supply to operate?

No, the internal circuits and signal converters of the NX-AD3603 are powered directly from the NX bus via the connected CPU Unit or Communications Coupler Unit.

Can the individual channels on the NX-AD3603 be turned off if they are not in use?

Yes, unused channels can be disabled within the configuration settings in Sysmac Studio. This optimizes CPU processing overhead and prevents floating inputs from displaying erratic values.

What happens if the input voltage on a channel exceeds the rated minus 10 V to plus 10 V range?

The module has an input conversion range of minus 5 percent to 105 percent of full scale, with an absolute maximum physical limit of plus/minus 15 V. Voltages beyond this maximum rating can cause permanent damage to the input circuitry.

Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin
Japan

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