Omron CJ1W-ID211 — 16-Point DC Input Unit, 24 VDC
SKU: CJ1W-ID211USD 30.00
CJ-series 24 VDC 16-point DC input unit with screw terminal block. Rated 7 mA input current, 3.3 kΩ input impedance. Used as basic I/O on CJ1M / CJ2M / CJ2H / NJ-series racks. 8.0 ms ON response (default) adjustable to 0-32 ms in PLC setup.
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Product Overview
The CJ1W-ID211 is the standard 16-point 24 VDC sinking (NPN-compatible) DC input unit for Omron's CJ-series PLC family — the workhorse I/O module that connects push-buttons, limit switches, proximity sensors, and other 24 VDC digital devices to a CJ1, CJ2, or NJ-series CPU. Each of the 16 input points accepts a 24 VDC signal (operating range 20.4 to 26.4 VDC) and draws 7 mA typical per point at 24 VDC through a 3.3 kΩ input impedance. The module presents 16 inputs in one 16-bit I/O word (16 points allocated in the CJ I/O memory map as either CIO 0xxx or work area Wxxx depending on slot).
CJ1W-ID211 family context (ID201 / ID212 / ID231 / ID233)
The CJ1W-ID2xx family splits along four axes: point count (8 / 16 / 32 / 64), input voltage (12-24 VDC vs 24 VDC vs 100/200 VAC), response speed (standard 8 ms vs high-speed 15 µs / 30 kHz), and connector type (screw terminal block vs MIL connector vs high-density connector). The CJ1W-ID211 (this SKU) sits at the standard-speed / 16-point / 24 VDC / screw-terminal intersection. For 8-point needs pick the CJ1W-ID201 (saves a half slot of panel space). For 32-point / MIL connector pick the CJ1W-ID231 (34-pin MIL, 32 inputs). For 64-point / high-density connector pick the CJ1W-ID261 (64 inputs across 2 CIO words).
Wiring, indicators, and setup parameters
Wiring uses a removable M3 screw terminal block (24 terminals: 16 input + 2 × common + 4 spare) — strip 7 mm of insulation from each conductor and tighten to 0.25 N·m. The polarity on the input side is polarity-independent (a bridge rectifier at each input), but the COM terminal must be returned to +24 VDC for sinking-sensor operation (NPN sensors) or to 0 V for sourcing-sensor operation (PNP sensors). 16 green input LEDs on the front face show the live state of each point (lit when the input is ON).
Interrupt inputs and high-speed counter compatibility
Although the CJ1W-ID211 is marketed as a 'standard speed' input unit, four of its inputs (CIO 0xx00 to 0xx03, configurable) can be reassigned in the PLC Setup as direct interrupt inputs to trigger high-priority tasks — useful for very fast emergency-stop or registration-mark detection without waiting for the normal scan cycle. The interrupt response on CJ2-series CPUs is 0.2 ms; on CJ1M-CPU21/CPU22 it's 0.5 ms; on CJ1G-CPU4[]H it's 1.0 ms.
Key Features
- 16-point 24 VDC digital input module for CJ-series PLCs
- Single 16-point group with one shared common terminal
- Rated input voltage 24 VDC, operating range 20.4 to 26.4 VDC
- Input impedance 3.3 kΩ, rated input current 7 mA per point
- ON voltage 14.4 VDC min / 3 mA min
- OFF voltage 5.0 VDC max / 1 mA max
- ON response time 8.0 ms max
- Supports quick-response inputs for first 4 inputs
- SKU: CJ1W-ID211
- Series: CJ1W CJ-series Basic I/O — DC Input
- Voltage: 24 VDC
- I/O: 24 I/O
Best-Fit Applications
- Push-button and selector-switch wiring panel for a machine operator console — 16 inputs wired to indicator lamps and start/stop buttons.
- Proximity-sensor interface on a conveyor — 16 E2B-M18 inductive sensors detecting part-present at 16 inspection stations, each wired to one.
- Limit-switch and safety-door switch interface — D4N-112G roller-lever switches wired into 16 inputs for end-of-stroke detection across multiple axes
- Discrete sensor multiplexing panel — E3Z-D82 diffuse sensors, EE-SX674 slot sensors, and E2E inductive sensors all sharing one 16-input module.
Buying Checklist
- Pick CJ1W-ID211 for a 24 VDC 16-point NPN/PNP input module with screw terminal block
- Pick CJ1W-ID201 for an 8-point version of this SKU
- Pick CJ1W-ID212 for high-speed 16-point DC input — 15 µs ON response for high-speed counters up to 30 kHz
- Pick CJ1W-ID232 for 32-point DC input with 40-pin MIL connector — saves panel space at higher density
- Pick CJ1W-ID261 for 64-point DC input with Fujitsu-compatible high-density connector
- Pick CJ1W-IA201 for 200 VAC inputs — needed for legacy AC-sensor installations
Technical Specifications
| Model | CJ1W-ID211 |
|---|---|
| Series | CJ1W CJ-series Basic I/O — DC Input |
| Type | 16-point DC input unit, screw terminal, removable |
| Rated Input Voltage | 24 VDC |
| Operating Voltage Range | 20.4 to 26.4 VDC |
| Input Impedance | 3.3 kΩ |
| Rated Input Current | 7 mA typical per point (at 24 VDC) |
| ON Voltage / ON Current | 14.4 VDC min / 3 mA min |
| OFF Voltage / OFF Current | 5.0 VDC max / 1 mA max |
| Common Type | Single common (16 points share 1 COM terminal) |
| Interrupt Input Response | 0.2 ms on CJ2-CPU[], 0.5 ms on CJ1M-CPU21/22, 1.0 ms on CJ1G-CPU[]H (first 4 inputs) |
| Terminal Wire Range | 0.2 to 1.5 mm² (AWG 24 to 16) |
| 5 VDC Backplane Current | 0.08 A |
| Internal Current Consumption | 0.08 A at 5 VDC |
| Operating Temperature | 0 to +55 °C |
Resources & Downloads
FAQ for CJ1W-ID211
Can the CJ1W-ID211 handle both NPN and PNP sensors?
Yes — the CJ1W-ID211 has a polarity-insensitive input bridge (each input has a diode bridge rectifier inside the module), so it accepts either NPN (sinking) sensors with their load output wired to the input terminal and the sensor's positive supply wired to +24 VDC, OR PNP (sourcing) sensors with their load output wired to the input terminal and the sensor's negative supply wired to 0 V.
What's the difference between CJ1W-ID211 and CJ1W-ID212?
Both are 16-point 24 VDC input modules in the same form factor. The CJ1W-ID211 (this SKU) is the standard-speed model with default 8.0 ms ON response time configurable 0-32 ms in the PLC Setup — suitable for general-purpose limit switches, push-buttons, proximity sensors, and any input that does not need sub-millisecond response.
Can I use the CJ1W-ID211 inputs as high-speed counters?
Only on specific CPUs and only at limited counting rates. The first 4 inputs (CIO 0xx00 to 0xx03) of the CJ1W-ID211 can be assigned as high-speed counter inputs on CJ1M-CPU21/22/23 (maximum counting rate 1 kHz with single-phase / 500 Hz with two-phase) and CJ2M-CPU3[] (maximum 50 kHz single-phase / 50 kHz two-phase when using the built-in HSC function).
How do I configure the 0-32 ms input filter on the CJ1W-ID211?
In CX-Programmer (for CJ1/CJ2 CPUs) or Sysmac Studio (for NJ-series), navigate to the PLC Setup / IO Table / Module Configuration, select the CJ1W-ID211, and find the 'Input Filter Time' or 'Input Response Time' parameter — the default is 8.0 ms.
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