Part of the Omron NX-Series Safety & I/O series — see the full model table, lifecycle status and replacement parts.
Omron NX-OC2633 — NX 2-Point Relay Output, 2 A
SKU: NX-OC2633USD 115.00
Omron NX-OC2633 NX-series 2-point relay NO output slice, 250 VAC 2 A, 12 mm wide. In stock, China shipping.
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Product Overview
The Omron NX-OC2633 is the NX-series 2-point Relay NO output unit, 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 NX-series I/O System brochure (R183).
It sits on the NX I/O bus and gives two normally-open relays on independent contacts (A1/B1 and A3/B3), so each point can switch a different load at a different voltage. Maximum switching is 250 VAC at 2 A or 24 VDC at 2 A per point. Each unit handles 4 A total. Minimum load is 5 VDC at 1 mA. Electrical life 100,000 operations; mechanical 20,000,000 operations. Relay is NOT user-replaceable.
ON / OFF response is 15 ms each way. Isolation 2300 VAC for 1 minute between the two contact groups. The slice is 12 mm wide, 65 g. SIL None - not for safety. For 16-point PNP transistor outputs choose NX-OD5256. For 32-point PNP on a 30 mm body choose NX-OD6256-5.
Key Features
- NX-series 2-point Relay NO output unit on independent contacts (A1/B1 and A3/B3), 250 VAC 2 A per point / 4 A per unit
- Switches AC and DC loads, 5 VDC 1 mA minimum load, 100,000 electrical / 20,000,000 mechanical operations
- 15 ms ON / 15 ms OFF response, 2300 VAC isolation between the two contact groups for 1 minute
- Screwless clamping 8-terminal connector, 12 x 100 x 71 mm, 65 g, Free-Run refreshing, NX unit power 1.20 W max on CPU
- SKU: NX-OC2633
- Series: NX-series Digital I/O Unit (NX-OC family) on NX I/O Bus and EtherCAT Coupler
Best-Fit Applications
- Switching a 230 VAC heating jacket and a 24 VDC solenoid valve on the same packaging line, one contact each
- Dry-contact alarm output driving a beacon and a horn from two independent NO contacts isolated to 2300 VAC
- Spare replacement for an NX-OC2633 that failed after end of electrical service life on an NX-ECC201 EtherCAT Coupler with an NJ501-1300 Sysmac CPU
Buying Checklist
- Pick the NX-OC2633 when the project needs two isolated normally-open relay outputs on a 12 mm wide NX I/O slice and the load voltage differs between points.
- Pick the NX-OC2733 instead when the wiring plan calls for A1/3, B1/3 terminal marking instead of the A1/B1, A3/B3 layout of the OC2633.
- Pick the NX-OD5256 instead when 16 sourcing PNP transistor channels at 0.5 A are enough and no relay isolation is needed.
Technical Specifications
| Manufacturer | Omron Corporation (Japan) |
|---|---|
| Series | NX-series Digital I/O Unit (NX-OC family) on NX I/O Bus and EtherCAT Coupler |
| Model / SKU | NX-OC2633 |
| Number of Outputs | 2 points, independent N.O. contacts (A1/B1 and A3/B3) |
| Maximum Switching | 250 VAC / 2 A at cos phi = 1; 250 VAC / 2 A at cos phi = 0.4; 24 VDC / 2 A per point; 4 A per unit |
| Minimum Switching | 5 VDC, 1 mA |
| Relay Service Life | Electrical 100,000 operations (depends on load); mechanical 20,000,000 operations; relay NOT user-replaceable |
| Response Time | 15 ms ON / 15 ms OFF maximum |
| Isolation | 2300 VAC for 1 minute between A1/B1 and A3/B3 contact groups; 510 VAC between internal circuit and GR |
| Connection / Power | Screwless clamping 8-terminal connector; I/O power from external source (not from NX bus); NX unit power 1.20 W on CPU, 0.80 W on Coupler |
| Refresh / Diagnostics | Free-Run refreshing; standard speed; no disconnection detection; no short-circuit detection; SIL None (not for safety) |
| Dimensions / Approvals | 12 (W) x 100 (H) x 71 (D) mm; 65 g; IP20; CE, cULus, RCM, KC |
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 NX-OC2633
What is the Omron NX-OC2633 used for?
It is the NX-series 2-point Relay NO output slice for the NX I/O bus. Typical uses are switching a 230 VAC heating jacket and a 24 VDC solenoid valve from the same rack, firing a beacon and a horn from two independent dry contacts, and replacing an NX-OC2633 that has reached end of electrical service life on an existing EtherCAT Coupler.
NX-OC2633 vs NX-OD5256 - what is the difference?
The NX-OC2633 has two N.O. relay contacts that switch AC or DC up to 250 VAC at 2 A, with 2300 VAC isolation between the two contact groups. The NX-OD5256 has 16 PNP transistor outputs at 0.5 A per point that switch 24 VDC only, no galvanic isolation. Pick the OC2633 for mixed AC/DC loads on a small slice; pick the OD5256 when you need many 24 VDC outputs at high cycle rate.
Is the relay in the NX-OC2633 replaceable?
No. The relay is sealed inside the slice and is not user-replaceable. Electrical life is 100,000 operations (varies with the load current; lighter loads last longer). Mechanical life is 20,000,000 operations. Replace the whole slice when the contacts reach end of service life; Sysmac Studio does not flag this automatically.
Is the NX-OC2633 suitable for safety circuits?
No. The NX-OC2633 is marked SIL None and is not for safety functions. For an emergency-stop relay or a safety door switch on an NX-SL3300 / NX-SL3500 safety controller, use the G9SA-301 AC-DC24 safety relay or the NX-SOD400 safety output unit.
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