Omron CJ1W-ID212 — 16-Pt DC Input, High-Speed, Removable TB
SKU: CJ1W-ID212USD 69.00
CJ-series 16-point 24 VDC digital input unit with screw terminal block and 15 µs quick-response / interrupt-input capability. 7 mA per point, 1 shared common, ON response time configurable 8 ms / 0–32 ms or high-speed 15 µs.
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Product Overview
The CJ1W-ID212 is Omron's 16-point 24 VDC digital input unit for the CJ-series PLC platform, distinguished from the standard CJ1W-ID211 (already done in our catalog) by its high-speed input capability — the 16 inputs can be reassigned in the PLC Setup as quick-response inputs with 15 µs ON / 90 µs OFF response time, usable as interrupt inputs (direct mode or counter mode) on the CJ2M, CJ2H, and NJ-series CPUs. This makes the CJ1W-ID212 the workhorse input unit for high-speed event capture: registration-mark detection on packaging lines, edge-of-glass detection on bottle lines, and overtravel-limit inputs on servo axes that must be serviced within one CPU scan — without resorting to a separate high-speed counter module like the CJ1W-CT021.
Decoding the CJ1W-ID212 model number
CJ1W = CJ-series expansion I/O; ID = DC input unit; 2 = high-speed (15 µs quick-response capable); 1 = 16 points (vs 2 = 32 points, 0 = 8 points); 2 = terminal-block removable (vs 1 = MIL connector, 3 = high-density 32-pt MIL). The 'ID212' codepoint thus says: high-speed 16-point terminal-block. Sibling models: CJ1W-ID211 (standard 8 ms / 16 pts / removable TB — the most common CJ input), CJ1W-ID231 (32 pts, 1 common, Fujitsu connector), CJ1W-ID232 (32 pts, 1 common, MIL connector), CJ1W-ID233 (high-speed 32 pts, MIL), CJ1W-ID261 (64 pts, 2 commons, MIL), CJ1W-ID262 (64 pts, Fujitsu connector).
Quick-response and interrupt input functionality
When the CJ1W-ID212 is mounted on a CJ2-series CPU rack and configured via the CJ2 PLC Setup (under 'Input Unit Quick Response' settings), the unit's 16 inputs are split into two groups: the first 8 points (CIO word n, bits 00-07) can be assigned as quick-response inputs; the second 8 points (n+1, bits 00-07) remain standard inputs.
Bidirectional input — works with NPN or PNP field devices
The CJ1W-ID212 uses a bidirectional optocoupler input stage: each of the 16 points references the COM terminal, which the user wires to either +24 VDC (for NPN sink-input devices like Omron E2E-X8MD1 2M sensors) or 0 V (for PNP source-input devices like the E2E-X8MY1 2M, E3Z-D82, or E3FA-DP21 family). This bidirectional polarity is the key feature that makes CJ1W-ID212 universal — you do not have to stock separate input units for NPN vs PNP sensors, unlike the CJ1W-IA@@@ AC-input units. Watch the COM-terminal voltage: if the wrong polarity is wired, the input will simply never turn ON — no damage but no signal.
Key Features
- CJ-series 16-point 24 VDC digital input unit
- High-speed input capability — first 8 inputs can be re-assigned as 15 µs quick-response / interrupt inputs on CJ2-series CPUs
- Screw-removable terminal block
- Compatible with CJ1M, CJ2M, CJ2H, and NJ-series CPUs
- Bidirectional optocoupler input — NPN sink or PNP source field devices accepted
- 24 VDC rated input
- 3.3 kΩ input impedance, 7 mA typical input current at 24 VDC
- ON threshold 14.4 VDC min / 3 mA min
- SKU: CJ1W-ID212
- Series: CJ1W I/O Basic Units (CJ-series expansion I/O)
- Voltage: 24 VDC
- I/O: 16 I/O
Best-Fit Applications
- Registration-mark detection on a horizontal form-fill-seal packaging machine — quick-response inputs 0-7 capture print-mark transitions at 100+ packages/min, triggering heat-seal.
- Servo overtravel-limit inputs on a pick-and-place gantry — quick-response inputs catch the ±OT limit switch on a 200 mm/s axis.
- High-speed encoder Z-phase index capture on a CNC machine tool — the encoder Z-pulse is wired to a quick-response input.
- PET bottle-edge detection on a filling line — retro-reflective sensor wired to quick-response input 0 detects bottle gaps as the.
Buying Checklist
- Pick CJ1W-ID212 for 16-pt 24 VDC high-speed input — supports 15 µs quick-response on inputs 0-7
- Pick CJ1W-ID211 for 16-pt 24 VDC standard input — cheaper when no high-speed input needed
- Pick CJ1W-ID231 for 32-pt 24 VDC input with Fujitsu connector — same response time as ID211
- Pick CJ1W-ID232 for 32-pt 24 VDC input with MIL connector — common for direct-to-bulkhead field wiring
- Pick CJ1W-ID233 for 32-pt HIGH-SPEED input with MIL connector — both high-speed AND 32 points in one unit
- Pick CJ1W-ID261 for 64-pt input when density matters, 2 commons
Technical Specifications
| Model | CJ1W-ID212 |
|---|---|
| Series | CJ1W I/O Basic Units (CJ-series expansion I/O) |
| Type | High-speed 16-point DC input unit, removable terminal block |
| Input Points | 16 points |
| Common Configuration | 1 common (all 16 points share one COM terminal) |
| Rated Input Voltage | 24 VDC |
| Operating Voltage Range | 20.4 to 26.4 VDC |
| Input Impedance | 3.3 kΩ |
| Input Current (typical at 24 VDC) | 7 mA per point |
| ON Voltage / ON Current | 14.4 VDC min / 3 mA min |
| OFF Voltage / OFF Current | 5 VDC max / 1 mA max |
| Internal Current Consumption | 90 mA at 5 VDC (from CJ bus) |
| Mounting | CJ-series DIN-rail mount, occupies one slot on CJ bus |
| Operating Temperature | 0 to +55 °C |
| Storage Temperature | -20 to +75 °C |
Resources & Downloads
FAQ for CJ1W-ID212
What's the difference between CJ1W-ID212 and CJ1W-ID211?
Both are 16-point 24 VDC input units with the same screw terminal block and identical electrical ratings (24 VDC, 7 mA per point, 3.3 kΩ impedance). The difference is response time: CJ1W-ID211 has a fixed 8 ms ON / 8 ms OFF default (selectable 0-32 ms in PLC Setup) with no quick-response capability.
How do I configure the CJ1W-ID212 quick-response inputs in CX-Programmer / Sysmac Studio?
On a CJ2-series CPU, open the PLC Setup (in CX-Programmer: 'PLC' menu → 'Edit PLC Setup' / in Sysmac Studio: double-click the CPU in the Multiview Explorer → 'PLC Setup'). Navigate to 'Input Unit Quick Response' settings — select the slot position where the CJ1W-ID212 is mounted, and enable the quick-response bits for inputs 0-7 of that unit. The CJ2M / CJ2H supports quick-response on the first 8 points of any mounted CJ1W-ID212 in slots 0-7 of the CPU rack.
Can I use the CJ1W-ID212 with both NPN and PNP sensors on the same unit?
No — all 16 inputs on a CJ1W-ID212 share one common terminal (COM), so they all reference the same polarity. If you wire COM to +24 VDC, the inputs accept NPN sink-output sensors (the sensor pulls the input to 0 V when active, sinking current into the input point). If you wire COM to 0 V, the inputs accept PNP source-output sensors (the sensor pushes the input to +24 VDC when active, sourcing current from the input point).
Is the CJ1W-ID212 compatible with CJ1-series CPUs like the CJ1M-CPU13?
Yes — the CJ1W-ID212 is fully compatible with the CJ1M-CPU@@, CJ2M-CPU@@, CJ2H-CPU@@, NJ101, NJ301, and NJ501-series CPUs. Quick-response input capability, however, requires a CJ2-series CPU (CJ2M or CJ2H) or NJ-series CPU — the older CJ1M CPU cannot assign quick-response to a CJ1W-ID212; quick-response on CJ1M was supported only on the older CJ1W-IDP01 dedicated high-speed input unit.
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