Omron CJ1W-OC211 — PLC Controller
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, 15 ms ON/OFF response, electrical life 150,000 ops at 24 VDC resistive. NY-24W-K-IE relays (non-replaceable).
1-Year Warranty
Full manufacturer warranty
Global Shipping
Worldwide delivery available
Genuine Omron
100% authentic product
Ready to Ship
Usually ships within 24h
In Stock
This item is available for immediate shipment from our warehouse.
Contact for pricing, bulk discounts, and shipping
Product Overview
The 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. 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.
Where the CJ1W-OC211 fits in the CJ1W output family
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). The CJ1W-OC211 (this SKU) sits at the 16-point / relay / 2 A / screw-terminal intersection. The 8-point relay sibling is the CJ1W-OC201 (8 × SPDT relays, independently wired, 2 A 250 VAC/24 VDC, 16 A/Unit). The 32-point and 64-point transistor-output siblings are the CJ1W-OD231 (32-point NPN, MIL connector) and CJ1W-OD261 (64-point NPN, high-density connector).
Relay contact configuration and wiring
The CJ1W-OC211 outputs are single-pole contact outputs — each output has one user-accessible contact terminal (NO) and one shared common terminal per group of points. Internally the relays are SPDT (Form C) but only the NO contact is wired to the user-accessible terminal; the NC contact and common are internal. For applications that need both NO and NC outputs from the same point count, use the CJ1W-OC201 (8-point SPDT, both NO and NC accessible per point).
Relay electrical life, surge protection, and AC/DC load considerations
The CJ1W-OC211's NY-24W-K-IE relays have a published electrical life of 150,000 operations at 24 VDC resistive load (the most common rating), 100,000 operations at 250 VAC cos φ = 0.4 (inductive), and 20,000,000 operations mechanical (no load). 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 (RC snubber for AC, flyback diode for DC) across the load to extend relay life.
Key Features
- 16-point relay output unit for CJ-series PLCs
- 2 A 250 VAC or 2 A 24 VDC per point
- Single-pole contact output
- Non-replaceable NY-24W-K-IE relays
- Electrical life: 150,000 ops at 24 VDC resistive / 100,000 ops at 250 VAC inductive
- Mechanical life: 20,000,000 operations
- 15 ms max ON response, 15 ms max OFF response
- Removable M3 screw terminal block
- SKU: CJ1W-OC211
- Series: CJ1W CJ-series Basic I/O — Contact Output
Best-Fit Applications
- Pneumatic valve solenoid control on a packaging machine — 16 × CJ1W-OC211 outputs driving 24 VDC valve solenoids, 200 mA.
- Motor contactor interposing on a conveyor line — CJ1W-OC211 outputs driving 230 VAC motor contactor coils, 2 A relay rating.
- 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-OC211 for 16-point relay output, 2 A per point, screw terminal — pick if you need to switch mixed AC/DC loads
- Pick CJ1W-OC201 for 8-point independent SPDT relays — pick if you need both NO and NC outputs from each point
- 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-OA201 for 8-point triac — pick for AC-only resistive loads with high cycle rate
- 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 word, 2 groups of 8) |
| 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 × H × D) | 31 × 90 × 65 mm |
| Certification | UL (Class I Div 2), CSA, CE, Lloyd's Register, EN 61131-2 |
Resources & Downloads
FAQ for CJ1W-OC211
Can the CJ1W-OC211 switch both AC and DC loads?
Yes — the CJ1W-OC211's relay outputs are dry contacts (no internal polarity), so each point can switch either AC or DC load up to 2 A at 250 VAC or 2 A at 24 VDC. You can mix AC and DC loads on the same module — for example, 8 × 24 VDC valve solenoids on the first group of 8 points and 8 × 230 VAC indicator lights on the second group.
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.
Similar Products
Explore related Omron models often viewed alongside this product.
