Part of the Omron CJ-Series PLCs series — see the full model table, lifecycle status and replacement parts.
Omron CJ1W-OC211 — 16-Point Relay Output Unit
SKU: CJ1W-OC211USD 43.00
CJ-series 16-point relay output unit, 2 A 250 VAC or 24 VDC per point (8 A per unit total), removable M3 screw terminal block
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Product Overview
The Omron CJ1W-OC211 is the 16-point relay output unit for Omron's CJ-series PLC family — the workhorse output module for applications that need to switch AC loads (valve solenoids, indicator lights, motor contactors, heating elements) at 2 A per point or DC loads up to 24 VDC at 2 A. manufactured by Omron Corporation. Hengyixin Automation stocks this relay 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 CJ-series basic I/O Unit specification table. Each of the 16 outputs is a single-pole contact output rated 2 A at 250 VAC or 2 A at 24 VDC, with all 16 points sharing the same removable M3 screw terminal block. The CJ1W output family splits along four axes: point count (8 / 16 / 32 / 64), output type (relay / transistor NPN / transistor PNP / triac), current rating (0.5 A / 2 A), and connector type (screw terminal / MIL connector / high-density connector). For inductive AC loads (valve solenoids, motor contactors, transformers) the electrical life is significantly shorter than for resistive loads (heaters, incandescent lights) due to contact arcing — always add an external surge suppressor.
Key Features
- 15 ms max ON response, 15 ms max OFF response
- 2 A 250 VAC or 2 A 24 VDC per point
- Electrical life: 150,000 ops at 24 VDC resistive / 100,000 ops at 250 VAC inductive
- Non-replaceable NY-24W-K-IE relays
- SKU: CJ1W-OC211
- Series: CJ1W CJ-series Basic I/O — Contact Output
- I/O: 16 points
Best-Fit Applications
- Pneumatic valve solenoid control on a packaging machine — 16 × CJ1W-OC211 outputs driving 24 VDC valve solenoids, 200 mA.
- Indicator light stack-light control — 8 × CJ1W-OC211 outputs driving 24 VDC multi-color indicator lamps, 2 A per output handles.
- Heating element switching via interposing — CJ1W-OC211 outputs driving G3PE-225B DC12-24V SSR control inputs for high-current heater switching (the CJ1W-OC211's.
Buying Checklist
- Pick CJ1W-OD211 for 16-point NPN transistor sinking — pick for fast DC-only switching
- Pick CJ1W-OD212 for 16-point PNP transistor sourcing — pick for fast PNP-source DC-only switching
- Pick CJ1W-OD231 for 32-point NPN transistor — pick for higher density at lower current
Technical Specifications
| Model | CJ1W-OC211 |
|---|---|
| Series | CJ1W CJ-series Basic I/O — Contact Output |
| Type | 16-point contact output unit, removable screw terminal |
| Number of Points | 16 points, 1 common (all outputs share one common - Omron's CJ1 table; two independent groups is the CJ1W-OD212 sourcing layout, not this unit) |
| Relay Type | NY-24W-K-IE (Fujitsu Takamizawa Components), non-replaceable |
| Max Switching Capacity (Resistive) | 2 A 250 VAC / 2 A 24 VDC (8 A per unit total) |
| Max Switching Capacity (Inductive cos φ = 0.4) | 2 A 250 VAC / 2 A 24 VDC |
| Min Switching Capacity | 1 mA 5 VDC |
| Terminal Wire Range | 0.2 to 1.5 mm² (AWG 24 to 16) |
| 5 VDC Backplane Current | 0.11 A |
| Internal Current Consumption | 0.11 A at 5 VDC |
| Operating Temperature | 0 to +55 °C |
| Dimensions (W x H x D) | 31 × 90 × 89 mm |
| Certification | UL (Class I Div 2), CSA, CE, Lloyd's Register, EN 61131-2 |
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 CJ1W-OC211
Can the CJ1W-OC211 switch both AC and DC loads?
Not across the whole card. Every one of the CJ1W-OC211's 16 contacts shares a single common (the datasheet specifies 16 points per common, 1 circuit), so all sixteen outputs must sit on the same supply. Individual points are dry contacts rated 2 A at 250 VAC or 2 A at 24 VDC, but you cannot put 24 VDC solenoids on some points and 230 VAC lamps on others without shorting the common. For a panel that genuinely needs mixed voltages, use the CJ1W-OC201, which has eight independent contacts each with its own common.
How long do the relays in the CJ1W-OC211 last?
The NY-24W-K-IE relays inside the CJ1W-OC211 are rated for 150,000 operations at 24 VDC 2 A resistive load (the typical rating), 100,000 operations at 250 VAC cos φ = 0.4 inductive load, and 20,000,000 operations mechanical (no load). For most machine-control applications (1-10 operations per minute, 8 hours/day, 250 days/year) the electrical life of 150,000 ops translates to ~3-7 years of service before relay failure becomes likely.
Why is the relay response time 15 ms on the CJ1W-OC211?
The 15 ms ON/OFF response time is the time for the relay's coil to energize (ON) or de-energize (OFF) and the contacts to physically close or open. This includes: (1) relay coil energization time (~5 ms for the NY-24W-K-IE coil); (2) contact armature movement (~3 ms); (3) contact bounce settling (~5 ms).
Can I replace a failed relay inside the CJ1W-OC211?
No — the NY-24W-K-IE relays inside the CJ1W-OC211 are soldered to the internal PCB and are NOT user-replaceable. The datasheet explicitly states 'Cannot be replaced'. At end-of-life (or if a single point's contacts weld from an over-current surge), the entire CJ1W-OC211 unit must be replaced.
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