Omron NX-DA2205 — 2-Pt 4-20mA Analog Output, High-Speed
SKU: NX-DA2205USD 302.00
NX-series 2-point analog current output slice with 4-20 mA output, 1/30000 resolution (15-bit equivalent), 10 us/point conversion time. Screwless push-in 8-terminal connector, 12 mm wide. Selectable Synchronous or Free-Run I/O refresh. For high-speed proportional valve and drive reference.
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Product Overview
The NX-DA2205 is Omron's high-speed 2-point analog current output slice for the NX-series modular I/O platform — providing 4-20 mA output with 1/30000 resolution and 10 us/point conversion time for proportional-valve control, variable-speed drive reference, and other high-speed analog control loops. The 1/30000 resolution is roughly 4x finer than the basic NX-DA2203 (1/8000), and the 10 us update is 25x faster than the basic 250 us/ch — together enabling servo-class analog control on hydraulic proportional valves, spindle speed reference, and tension-control loops where the basic slice's 250 us update would introduce a perceptible lag.
Decoding NX-DA2205 within the NX-DA family
The NX-DA@@@@ model code has four positional digits that encode point count, output type, and resolution: __22_ = 2-point current output (vs __26_ = 2-pt voltage, __32_ = 4-pt current, __36_ = 4-pt voltage); __2_05 = 1/30000 high-speed 10 us (vs __2203 = 1/8000 basic 250 us). The NX-DA2205 codepoint thus decodes as 2-point current output with high-speed 1/30000 resolution.
Synchronous vs Free-Run I/O refresh — when to choose which
The NX-DA2205 supports two I/O refresh modes selected in Sysmac Studio: (a) Synchronous I/O refreshing — the output updates at the EtherCAT cycle (typically 250 us to 4 ms, depending on the cycle time set on the NX-ECC@@@ coupler). The output value is read from the EtherCAT process data at each cycle boundary, so the analog output is in lockstep with the rest of the I/O and the NJ/NX CPU's program execution.
Application context: hydraulic press proportional valve control
A typical application for the NX-DA2205 is hydraulic press proportional valve control for a forming or forging press. The press has 2 proportional valves (one for the ram, one for the die cushion), each valve accepting a 4-20 mA command signal where 4 mA = closed, 12 mA = 50% flow, 20 mA = 100% flow. The 1/30000 resolution gives ~0.5 uA per step, providing smooth proportional control across the valve's full stroke range. The 10 us update rate gives the valve's closed-loop position controller fresh commands every 10 us, ensuring the cylinder position tracks the commanded profile without lag.
Key Features
- NX-series 2-point analog current output slice
- Output range: 4 to 20 mA
- Resolution: 1/30000
- Conversion time: 10 us/point
- Selectable I/O refresh: Synchronous I/O refreshing or Free-Run refreshing
- Output conversion range: -5 to 105% of full scale
- Output accuracy: +/-0.1% of full scale at 25 C, +/-0.3% at 0-55 C
- External connection: Screwless clamping terminal block
- SKU: NX-DA2205
- Series: NX-series Analog Output Units
- Voltage: 24 VDC
- I/O: 4 I/O
Best-Fit Applications
- Hydraulic press proportional valve control - 2 proportional valves on a forming/forging press, each accepting 4-20 mA command signal; the.
- Spindle speed reference on a CNC lathe - NX-DA2205 outputs 4-20 mA to the spindle drive's speed-reference input, with the.
- Tension control on a wire-winding machine - NX-DA2205 outputs 4-20 mA to a dancer-position-controlled tension brake, with the NJ501 reading.
- Variable-speed drive reference for multiple inverters - 4-20 mA reference signal to two 3G3MX2-A4075-V2 VFDs on a conveyor system, where.
Buying Checklist
- Pick NX-DA2205 for 2-pt 4-20 mA analog output, high-speed 1/30000 10 us - servo-class proportional valve or drive reference
- Pick NX-DA2203 for 2-pt 4-20 mA analog output, basic 1/8000 250 us - process loops at 100 ms update, half the cost
- Pick NX-DA2605 for 2-pt -10 to +10 V analog output, high-speed - voltage-output valve positioners or drive references
- Pick NX-DA2603 for 2-pt -10 to +10 V analog output, basic - voltage process loops at 100 ms update
- Pick NX-DA3205 for 4-pt 4-20 mA analog output, high-speed - 4-axis proportional valve control
- Pick NX-DA3203 for 4-pt 4-20 mA analog output, basic - 4-axis process loops at 100 ms update
Technical Specifications
| Model | NX-DA2205 |
|---|---|
| Series | NX-series Analog Output Units |
| Type | 2-point analog current output slice, high-speed |
| Number of Points | 2 points |
| Output Range | 4 to 20 mA |
| Output Conversion Range | -5 to 105% of full scale (3.2 to 21 mA drive) |
| Resolution | 1/30000 (15-bit equivalent) |
| Output Setting Value (Decimal) | 0 to 30000 (for 0-100% of full scale) |
| Absolute Maximum Output Current | 30 mA (short-circuit protection triggers above) |
| Current Consumption from I/O Power Supply | 10 mA max (for 24 VDC I/O supply) |
| Mounting | NX-series 35 mm DIN-rail mount, occupies one slice (12 mm wide) |
| Dimensions (W x H x D) | 12 x 100 x 71 mm |
| Operating Temperature | 0 to +55 C |
| Storage Temperature | -25 to +85 C |
| Certifications | CE, cULus listed (Class I Div 2), UL 508, KC, Lloyd's Register |
Resources & Downloads
FAQ for NX-DA2205
What's the difference between NX-DA2205 and NX-DA2203?
Both are NX-series 2-point 4-20 mA analog current output slices with the same 12 mm width, same load impedance, same external connection terminal block, and same NX bus compatibility. The differences: (a) Resolution - NX-DA2203 is 1/8000 (13-bit equivalent), NX-DA2205 (this SKU) is 1/30000 (15-bit equivalent). The 2205 gives 3.75x finer output resolution, useful for smooth proportional-valve control across the full stroke range.
Can the NX-DA2205 be used with both EtherCAT and EtherNet/IP networks?
Yes - the NX-DA2205 works with both EtherCAT and EtherNet/IP network masters when paired with the appropriate NX-series coupler: (a) NX-ECC201 / NX-ECC202 / NX-ECC203 - EtherCAT couplers (ECC201 already done). When one of these is used, the NX-DA2205 is on the EtherCAT network, communicating at the EtherCAT cycle (typically 250 us to 4 ms). (b) NX-EIC202 - EtherNet/IP coupler. When this is used, the NX-DA2205 is on the EtherNet/IP network, communicating via CIP message or tag-data-link.
How does the screwless push-in terminal block work on the NX-DA2205?
The NX-DA2205 has an 8-terminal screwless clamping terminal block on the front face for the analog output wiring (4-20 mA loop). The terminal block uses push-in spring-cage technology - to wire, strip 8 mm of insulation from a ferrule-terminated wire (or solid wire 0.25-1.5 mm^2 / stranded with ferrule 0.25-1.0 mm^2), insert into the terminal, and the internal spring clamp engages automatically.
What is the difference between Synchronous and Free-Run I/O refresh on the NX-DA2205?
The NX-DA2205 supports two I/O refresh modes selectable in Sysmac Studio: (a) Synchronous I/O refreshing - the analog output updates at the EtherCAT cycle boundary. The NJ/NX CPU writes the desired output value to the EtherCAT process data; at each EtherCAT cycle (typically 250 us to 4 ms), the NX-DA2205 reads the value and updates the analog output.
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