Part of the Omron NX-Series Safety & I/O series — see the full model table, lifecycle status and replacement parts.
Omron NX-AD4603 — 8-Ch Analog Input, -10 to +10 V
SKU: NX-AD4603USD 195.00
Omron NX-AD4603 NX-series 8-channel analog voltage input, -10 to +10 V single-ended, 1/8000, 12 mm wide. In stock, China shipping.
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Product Overview
The Omron NX-AD4603 is the NX-series 8-ch analog voltage input unit, manufactured by Omron Corporation. Hengyixin Automation stocks this I/O expansion unit in Xiamen and ships within 3-5 business days to most Asian, European, and North American ports. Specifications on this page were checked against Omron's NX-series I/O System brochure (R183).
It sits on the NX I/O bus behind an NX-ECC201 EtherCAT Coupler or on the right of an NX102 / NX1P2 CPU and reads 8 single-ended voltage signals at -10 to +10 V. Resolution 1/8000 (13-bit) and 250 microseconds per point conversion time cover most general-purpose analog needs - process transmitters, panel meters, load cells through an external amplifier.
Free-Run refreshing only - no synchronous sampling against the EtherCAT cycle. The slice is fed from the NX bus, no separate 24 VDC supply. Input impedance 1 MOhm min, absolute max +/-15 V. 12 mm wide, 70 g. Not for safety (SIL None). The 4-ch differential higher-speed version is NX-AD3603. The 4-20 mA version is NX-AD4203. The differential-equalized 8-ch is NX-AD4604.
Key Features
- NX-series 8-channel analog input unit, voltage type, single-ended input, -10 to +10 V range
- Resolution 1/8000 (13-bit full scale), 250 microseconds per point conversion, accuracy 0.2 percent at 25 C and 0.4 percent at 0-55 C
- Free-Run refreshing only (no synchronous sampling); input impedance 1 MOhm min; absolute max +/-15 V
- Screwless push-in 16-terminal connector, NX bus-powered, 12 (W) x 100 (H) x 71 (D) mm, 70 g, IP20
- SKU: NX-AD4603
- Series: NX-series Analog I/O Unit (NX-AD family) on NX I/O Bus
- I/O: 8 I/O
Best-Fit Applications
- Multi-zone oven temperature control where the NX-AD4603 reads four 4-20 mA transmitters via 250 ohm shunts and four -10 to +10 V pressure transducers
- Tank farm level monitoring where eight pressure transmitters on -10 to +10 V scale to engineer units in Sysmac Studio
- Spare replacement on a process skid where the original NX-AD4603 was lost and Sysmac Studio holds the I/O map and channel scaling
Buying Checklist
- Pick the NX-AD4603 when you need 8 single-ended -10 to +10 V inputs on a 12 mm NX slice with Free-Run refreshing.
- Pick the NX-AD3603 instead when 4 differential inputs at 1/30000 resolution with 10 microsecond sampling and synchronous refreshing are required.
- Pick the NX-AD4203 instead when the field devices are 4-20 mA current loops instead of -10 to +10 V voltage signals.
Technical Specifications
| Manufacturer | Omron Corporation (Japan) |
|---|---|
| Series | NX-series Analog I/O Unit (NX-AD family) on NX I/O Bus |
| Model / SKU | NX-AD4603 |
| Number of Points | 8 single-ended analog inputs |
| Input Range | -10 to +10 V (input conversion range -5 to +105 percent of full scale) |
| Resolution / Conversion | 1/8000 (13-bit) full scale; 250 microseconds per point; 2 ms per unit conversion |
| Accuracy | 25 C +/-0.2 percent full scale; 0 to 55 C +/-0.4 percent full scale |
| Input Impedance / Max | 1 MOhm min; absolute maximum +/-15 V |
| Refreshing | Free-Run refreshing only |
| Isolation | Transformer (power) + digital isolator (signal) between input and NX bus; no isolation between inputs; dielectric 510 VAC for 1 minute |
| Connection / Power | Screwless push-in 16-terminal connector; IOG 0.1 A per terminal; NX unit power 1.45 W max on CPU / 1.15 W max on Coupler |
| Dimensions / Approvals | 12 (W) x 100 (H) x 71 (D) mm; 70 g; IP20; 0 to 55 C ambient; SIL None; CE, cULus, RCM, KC |
Manufacturer documentation
Omron's own product page, where the manufacturer's current specification and lifecycle information are published. We are an independent distributor and cannot mirror those documents; the link goes to Omron's site.
FAQ for NX-AD4603
What is the Omron NX-AD4603 used for?
It is the NX-series 8-channel analog voltage input unit for -10 to +10 V signals. Typical uses are multi-zone oven temperature control with 4-20 mA transmitters, tank farm level monitoring with hydrostatic pressure transmitters, and spare replacement on a process skid where Sysmac Studio holds the channel scaling.
NX-AD4603 vs NX-AD3603 - what is the difference?
Both are NX-series analog voltage input units. The AD4603 has 8 single-ended inputs at 1/8000 (13-bit) with 250 microsecond conversion and Free-Run refreshing only. The AD3603 has 4 differential inputs at 1/30000 with 10 microsecond conversion and synchronous refreshing against the EtherCAT cycle. Pick the AD4603 for general-purpose 8-ch voltage at moderate speed; pick the AD3603 for high-speed 4-ch differential.
Does the NX-AD4603 need a 24 VDC supply?
No separate 24 VDC supply. The slice draws NX unit power from the NX bus (1.45 W max on a CPU, 1.15 W max on a Coupler) and supplies the IOG terminal for shielded cable termination. For transmitter excitation, the field device still needs its own 24 VDC loop power.
How do I configure the NX-AD4603 in Sysmac Studio?
Add it under Configurations - CPU Rack or EtherCAT Slave Terminal, drag the slice in, and set the channel scaling (percent to engineer units) and moving-average filter under the slice's Analog I/O tab. The I/O map exposes 8 input words. Save and download to the controller.
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