Omron CJ1W-NC233 — PLC Controller
SKU: CJ1W-NC233USD 335.00
CJ-series 2-axis position control unit with RS-422 line-driver pulse output for stepper and servo drives. 500 kpps max, 100 sequences per axis, trapezoidal + S-curve accel/decel, linear interpolation, XW2Z cable family.
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Product Overview
The CJ1W-NC233 is Omron's 2-axis position control unit for the CJ-series PLC platform, delivering line-driver (RS-422 differential) pulse output to stepper or servo drives at up to 500 kpps per axis. It is the workhorse motion-control module for mid-complexity machines — 2-axis gantries, X-Y plotters, simple pick-and-place stations, X-Theta indexing tables — where the user wants pulse-train control without the cost or complexity of a MECHATROLINK-III network. The unit runs in 'memory operation' mode (execute a pre-loaded sequence of 100 positions per axis) or in 'direct operation' mode (the PLC sends target position words on the fly), and supports linear interpolation between the two axes for straight-line moves like sealing-bar traverses on a packaging machine.
Decoding CJ1W-NC233 within the NC@@@ family
The CJ1W-NC@@@ model code follows two positional digits: __1_ = 1 axis (NC113/NC133), __2_ = 2 axes (NC213/NC233), __4_ = 4 axes (NC413/NC433); _X = output type (1 = open-collector, 3 = line-driver). The NC233 codepoint thus decodes as 2-axis line-driver output. Siblings the engineer is likely to cross-shop: CJ1W-NC113 (1-axis open-collector — for single-axis stepper control), CJ1W-NC133 (1-axis line-driver — for single-axis servo with noise-sensitive long cable), CJ1W-NC213 (2-axis open-collector — for 2-axis stepper control, lower cost than NC233), CJ1W-NC413 (4-axis open-collector — for 4-axis stepper / 4-axis pulse-train control), CJ1W-NC433 (4-axis line-driver — for 4-axis servo).
Line-driver vs open-collector output — when to choose NC233
The line-driver output on the CJ1W-NC233 is differential A/A\, B/B\ RS-422 signaling at 5 VDC, capable of driving cable lengths up to 10 m at 500 kpps. The open-collector variant (CJ1W-NC213) is single-ended 24 VDC pull-up, suitable for cable lengths of 2-3 m. For typical cabinet wiring (1-3 m), open-collector is fine and saves cost. For: (a) cable runs >3 m, (b) long cable-chain axes on a gantry, (c) installations near VFDs or servo drives with significant electrical noise, or (d) high-frequency pulse trains >200 kpps — line-driver (NC233) is the right pick.
Memory operation and direct operation modes
In memory operation mode, the CJ1W-NC233 stores up to 100 position sequences per axis in the unit's internal RAM (sequenced from the PLC's I/O memory at start). Each sequence has a target position, target speed, accel/decel time, dwell time, and a completion code. The PLC program triggers sequence 0 to begin, and the NC233 executes the position automatically — the PLC program doesn't need to send each pulse; the unit handles everything via its onboard DSP. This is the right pick for repetitive point-to-point moves (indexing tables, screw-fastening machines).
Key Features
- CJ-series 2-axis position control unit
- Line-driver pulse output for noise-immune long-cable servo/stepper drives
- Open-loop pulse-train control — no encoder feedback to the unit
- Up to 500 kpps per axis pulse rate
- Position range: -2,147,483,648 to +2,147,483,647 pulses per axis
- 100 memory-operation sequences per axis
- Direct operation mode for PLC-driven target positions
- Trapezoidal and S-curve acceleration/deceleration
- SKU: CJ1W-NC233
- Series: CJ1W Special I/O Units (CJ-series position control)
- I/O: 422 I/O
Best-Fit Applications
- X-Y gantry on a gluing machine on a packaging line — X axis carries the dispense head back and forth.
- 2-axis pick-and-place station on a SMT line — X axis positions the pick head over the feeder, Y axis positions.
- X-Theta indexing table on a bottling line — X axis indexes the bottle carousel in 30° steps, Theta axis rotates.
- Screw-fastening machine on an assembly line — Z axis lowers the screwdriver, Y axis shifts to the next fastener position.
Buying Checklist
- Pick CJ1W-NC233 for 2-axis pulse-train position control with line-driver output — noise-immune long-cable applications, Accurax G5/1S servo drives
- Pick CJ1W-NC213 for 2-axis open-collector output — lower cost for short-cable stepper applications
- Pick CJ1W-NC113 for 1-axis open-collector — single-axis stepper applications, lowest cost
- Pick CJ1W-NC133 for 1-axis line-driver — single-axis servo with long cable / noise-sensitive wiring
- Pick CJ1W-NC413 for 4-axis open-collector — 4-axis stepper control or 4-axis pulse-train
- Pick CJ1W-NC433 for 4-axis line-driver — 4-axis servo with long cable
Technical Specifications
| Model | CJ1W-NC233 |
|---|---|
| Series | CJ1W Special I/O Units (CJ-series position control) |
| Type | 2-axis position control unit, line-driver output |
| Controlled Axes | 2 axes |
| Control Mode | Open-loop pulse-train output (no encoder feedback to the unit) |
| Output Type | Line driver (RS-422 differential A/A\, B/B\) |
| Output Connector | MIL 40-pin connector on the unit front face; sold separately to drives via XW2Z-@@@J-A19 cable |
| Maximum Pulse Rate | 500 kpps per axis |
| Position Range | -2,147,483,648 to +2,147,483,647 pulses per axis (32-bit signed) |
| Internal Current Consumption | 5 VDC 250 mA max (from CJ bus); 24 VDC external supply 20 mA max |
| Mounting | CJ-series DIN-rail mount, occupies one slot on CJ bus |
| Dimensions (W × H × D) | 31 × 90 × 65 mm |
| Operating Temperature | 0 to +55 °C |
| Storage Temperature | -20 to +75 °C |
| Certifications | CE, cULus, UL 508, KC, Lloyd's Register |
Resources & Downloads
FAQ for CJ1W-NC233
What's the difference between CJ1W-NC233 and CJ1W-NC213?
Both are 2-axis position control units for the CJ-series PLC. The difference is the pulse output type: NC213 is open-collector output (single-ended 24 VDC pull-up, suitable for cable lengths up to 2-3 m, lower cost), NC233 is line-driver output (RS-422 differential A/A\, B/B\ at 5 VDC, capable of up to 10 m cable at 500 kpps, noise-immune). For typical in-cabinet wiring (1-3 m, low noise), NC213 is sufficient and saves cost.
What servo drives can I connect to the CJ1W-NC233?
The CJ1W-NC233 outputs line-driver (RS-422 differential) pulse-train signals, which is the standard pulse input on virtually every modern servo drive. Specifically tested and supported by Omron: Accurax G5 servo drives (R88D-KN@@@H-ECT, using the XW2Z-@@@J-A19 cable to the CN1 connector), Accurax 1S servo drives (R88D-1SN@@@H-ECT, same cable), SMARTSTEP 2 stepper driver (R7D-BP@@@H, using XW2Z-@@@J-A19 cable), SMARTSTEP A-series stepper driver (R7D-AP@@@H, using XW2Z-@@@J-A21 cable).
How do I configure the CJ1W-NC233 in CX-Position / CX-Motion?
Install CX-Position (the configuration tool for the NC@@@ family) on the same PC as CX-Programmer. Open CX-Position, create a new project, and select the CJ1W-NC233 from the unit list. The tool lets you configure: (a) axis parameters (pulse rate per motor revolution, gear ratio, feed constant, units), (b) origin search settings (origin proximity input, home position, ±OT limit, search speed), (c) memory operation sequences (each with target position, target speed, accel/decel, dwell, completion code), (d) backlash compensation, (e) software limits.
What is the maximum pulse rate on the CJ1W-NC233, and what does that mean for motor speed?
The CJ1W-NC233 outputs up to 500 kpps per axis (line-driver output). The motor speed follows the formula: Motor RPM = (Pulse rate Hz × 60) / (Pulses per motor revolution).
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