Omron NX-AD3603 Analog Input Unit NX Series

NX-AD3603 Omron Analog Input Unit NX Series

NX-AD3603 Omron NX Series Analog Input Unit

Omron NX-AD3603 NX Series Analog Input Unit

The Omron NX-AD3603, also cataloged as the NX-AD3603 Analog Input Unit, operates as a dedicated hardware component for single-ended analog voltage acquisition within NX Bus automation platforms.

Model Number Decoding & Functionality

The module designation defines specific operational metrics: "AD" identifies the device as an Analog Input type, "3" specifies 4 input points, "6" designates the -10 to +10 V voltage range, and "03" defines a 1/8000 conversion resolution operating at a 250 us/point conversion rate via Free-Run refreshing.

Hardware Specifications

Backplane Synchronization & Channel Isolation

Galvanic decoupling between field wiring and the internal NX bus relies on a transformer for power isolation and digital isolators for signal transmission. The high-speed internal bus architecture maintains backplane bus communication velocity across dense I/O configurations. Insulation resistance measures 20 Mohm min. at 100 VDC between isolated circuits, withstanding 510 VAC dielectric strength for 1 minute with leakage below 5 mA.

Package Component List

• 1 x Omron NX-AD3603 Analog Input Unit

• 1 x Screwless Clamping Terminal Block (12 terminals)

• 1 x Terminal Block Insertion Guide

Panel Installation & Field Wiring Directives

• Snap the module onto a standard 35 mm DIN rail within a grounded metallic enclosure.

• Connect shielded twisted-pair cables to the screwless clamping terminal block to mitigate electromagnetic field interference.

• Maintain a minimum bending radius for input wiring channels to prevent physical strain on the 12-terminal connector.

• Connect shield wires directly to functional ground terminals to ensure overall measurement accuracy.

Frequently Asked Questions

• Q: What is the full-scale conversion resolution of this analog input unit?

  A: The hardware provides a digital conversion resolution of 1/8000 across the -10 to +10 V operating range.

• Q: What is the sampling conversion time per channel?

  A: The module executes signal conversion at a rate of 250 us per point under Free-Run refreshing mode.

• Q: Is individual channel-to-channel isolation provided?

  A: No, isolation is provided between the input circuits and the NX bus, but not between individual input channels.

• Q: What terminal connection type is integrated into the front panel?

  A: The unit features a removable screwless clamping terminal block configured with 12 wiring terminals.

• Q: What is the absolute maximum voltage rating for the signal inputs?

  A: The absolute maximum rating supported without damaging the input circuitry is +/-15 V.

• Q: How is power supplied to the internal module circuitry?

  A: Power is supplied directly from the internal backplane bus interface of the connected CPU or coupler.

• Q: What is the input impedance rating across the voltage terminals?

  A: The input impedance measures 1 Mohm minimum across all four single-ended input channels.

• Q: What is the overall conversion accuracy across the entire ambient temperature range?

  A: The overall accuracy is +/-0.2% full scale at 25 deg C and +/-0.4% full scale from 0 to 55 deg C.