Part of the Omron NX-Series Safety & I/O series — see the full model table, lifecycle status and replacement parts.
Omron NX-AD3204 — 4-Ch 4-20 mA Analog Input
SKU: NX-AD3204USD 160.00
NX 4-ch 4-20 mA differential analog input, 1:8000, 250 us/ch, 12 mm wide. In stock, China.
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Product Overview
The Omron NX-AD3204 is an NX-series 4-channel 4-20 mA differential analog input unit with a 1/8000 resolution It is 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).
Each of the four channels accepts a 4 to 20 mA signal in differential mode and converts it to a 13-bit value at 250 us per channel. The screwless push-in 12-terminal block simplifies wiring and is removable.
Body size is 12 x 100 x 80 mm at 70 g. Key specs: Number of Inputs 4 channels; Input Type 4 to 20 mA, differential; Resolution 1/8000 (13-bit); Conversion Time 250 us per channel (1 ms per unit); Input Method Differential; I/O Refreshing Method Free-Run only; Operating Load Voltage 10.2 to 28.8 VDC; External Connection Screwless push-in 12-terminal block.
Key Features
- NX-series 4-channel 4-20 mA differential analog input
- 1/8000 (13-bit) resolution, 250 us per channel conversion
- Screwless push-in 12-terminal block, Free-Run refreshing only
- 12 x 100 x 80 mm, 70 g, IP20, 0.90 W NX-bus max
- SKU: NX-AD3204
- Series: NX-series Analog Input Unit
- Voltage: 10.2 TO 28.8 VDC
- I/O: 10 I/O
Best-Fit Applications
- Monitoring tank level from four 24 VDC loop-powered ultrasonic level sensors on a CIP cleaning skid.
- Reading four 4-20 mA pressure transducer loops on a hydraulic press and scaling them to bar in the PLC.
- Bench testing where each of the four channels reads a different load cell amplifier output for calibration across the 4-20 mA range.
Buying Checklist
- Choose the NX-AD2208 instead when 1/30000 resolution is needed for high-precision weighing or strain-gauge work.
- Choose the NX-AD3204 when four 4-20 mA differential inputs are needed and Free-Run refreshing is enough.
- Choose the NX-AD2204 instead when you need 1/8000 resolution with single-ended wiring for cheaper sensor cabling.
Technical Specifications
| Series | NX-series Analog Input Unit |
|---|---|
| Number of Inputs | 4 channels |
| Input Type | 4 to 20 mA, differential |
| Resolution | 1/8000 (13-bit) |
| Conversion Time | 250 us per channel (1 ms per unit) |
| Input Method | Differential |
| I/O Refreshing Method | Free-Run only |
| Operating Load Voltage | 10.2 to 28.8 VDC |
| External Connection | Screwless push-in 12-terminal block |
| NX Unit Power Consumption | 0.90 W max |
| Current Consumption from I/O Power | 10 mA max at 24 VDC |
| Dimensions | 12 x 100 x 80 mm, 70 g, IP20 |
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-AD3204
What is the difference between NX-AD3204 and NX-AD2204?
The NX-AD3204 is differential-only with 250 us conversion. The NX-AD2204 is also 4-channel and 1/8000 but supports both single-ended and differential wiring at the same conversion time. Pick the 3204 for noisy cabinets where differential gives better noise rejection on long cable runs.
Does the NX-AD3204 support Synchronous I/O refreshing?
No - the NX-AD3204 supports Free-Run refreshing only. For Synchronous I/O with NX-ECC202 / ECC203, choose the higher-resolution NX-AD2208 (1/30000, Synchronous I/O capable) at the cost of a much higher price per slice today, on average at retail price.
Can the NX-AD3204 mount on an EtherCAT coupler?
Yes - the NX-AD3204 mounts on the NX-ECC201, NX-ECC202, NX-ECC203 EtherCAT Coupler, the NX-EIC202 EtherNet/IP Coupler, or directly on the NX102 modular CPU bus. The 12 mm width keeps four slices under 50 mm of DIN rail space at one time.
What is the maximum cable length for 4-20 mA signals?
Up to 100 m with shielded twisted-pair cable in a typical industrial cabinet. The differential input rejects common-mode interference up to 30 V peak. Use individually shielded pairs where multiple channels run in the same cable tray to avoid crosstalk.
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