Westinghouse 5X00226G03 Ovation 5X00226G03 Card, Verified Surplus With Nameplate Photo

Description

Product Core Brief

• Model: 5X00226G03
• Brand: Westinghouse / Emerson Ovation heritage
• Core Function: Sold across two completely different roles, either as part of an Ovation controller set or as an Ovation I/O module for signal processing and spares coverage
• Product Family: 5X00226 series, where G01 and G02 often appear together in spare lists, G03 shows up in controller and I/O writeups, and OCR1100 is commonly listed as 5X00481G04 with 5X00226G04
• Common Confusion: Reseller pages call it a DPU computer module handling data processing and transfer, an Ovation I/O module used as a like for like replacement to recover failed channels, and even describe current mode control and PWM theory that has nothing to do with the part
• Condition: New Surplus / Pulled Used, nameplate photo and rack photo required

Product Introduction

Westinghouse 5X00226G03 is one of the noisiest numbers in the Ovation spare market because almost nobody publishes a real datasheet for it. Some sellers describe it as a possible Emerson Ovation DPU computer module or Westinghouse DCS card responsible for data processing and transfer. Others list it as a field proven Ovation I/O module used to maintain and expand control points, chosen as a direct like for like replacement to stabilize aging loops and recover failed channels without re engineering. Both stories circulate on the same part number.

The confusion spreads because the whole 5X00226 family gets dumped into generic spare lists next to cards like 5X00241G02, 5X00070G04, 5X00119G01 and 1C31227G01, with no function stated. Meanwhile OCR1100 controllers are commonly referenced as 5X00481G04 with 5X00226G04, which pulls the series toward controller hardware rather than field I/O. Add in pages that paste whole paragraphs about current mode control, inductor peak current and slope compensation under this model number, and you can see how buyers end up ordering the wrong thing.

The practical takeaway is that the suffix and your own cabinet files decide everything. A controller side failure drops a whole DPU, kills redundancy and takes many points offline at once, while an I/O card failure usually only kills the channels on that slot. Confirm which world you are in before you spend an outage window on the wrong board.

Key Technical Specifications

No confirmed factory datasheet is publicly available under this number alone, so treat catalog blurbs as leads until matched to your own project files.

Quality Control Process

This part gets verified against your own documentation before any money moves.

1. Nameplate and suffix check. Confirm it really is G03, since G01, G02 and G04 circulate in the same lists and point at different hardware.
2. Confirm which family your rack runs. If your files reference OCR1100 hardware, check whether the listed pairing is 5X00481G04 with 5X00226G04 rather than G03
3. Confirm the terminal board. Field terminations stay on the terminal or connector board, so verify the exact terminal board model and channel mapping before commissioning
4. Scan the slot out of service. Take the points out of service in I/O Builder before pulling anything, then restore them to their original state after the swap.
5. Follow the install order. Seat the characteristic module in the base first, then slide in the electronic module so it locks, then close the locking lever, and reverse that when removing.
6. Check pin alignment before powering. Misaligned pins can burn a card the moment power goes on.
7. Grounding and shielding review. Keep cabinet ground bonding intact and route shielded signal cable per site standards to control noise
8. Redundancy and loop test. For controller hardware force a primary to secondary change and watch for output jumps, for I/O hardware drive or inject each channel and confirm the faceplate follows.
9. ESD bag with desiccant. Pulled boards stored in humid warehouses often fail silently months later.

I once saw a buyer order by number alone after a reseller called it an I/O card, while the rack actually needed controller side hardware. Nobody checked the I/O Builder export, the DPU refused to come back cleanly, and the team lost most of a planned outage window re tracing the rack.

Replacement Pitfall Guide

❗ Believing the DPU computer module story. Some sellers describe this number as a module responsible for data processing and transfer, which may be a guess copied across listings rather than a factory definition

❗ Believing the generic I/O module story. Other pages call it a like for like Ovation I/O replacement for recovering failed channels, which conflicts with controller side listings

❗ Reading PWM current mode writeups as specs. Pages pasting current mode control, inductor peak current and slope compensation theory under this model are template content, not product data

❗ Ignoring the suffix. OCR1100 is commonly referenced with 5X00226G04 instead of G03, so grabbing the wrong suffix can leave you with an unusable board

❗ Skipping the terminal board check. Wrong terminal board or channel mapping produces outputs landing on the wrong device, which is far more dangerous than a dead channel.

❗ Pulling a card with points in service. Always scan the slot out first, otherwise you risk unexpected valve or starter behavior during the swap.

❗ Trusting blanket one year warranties and instant delivery. Sealed box claims, flat warranties and fast lead times are catalog habits, not proof of verified stock

Keep these in mind and you’ll cut 90% of rework time.

Compatibility Matrix & Benchmarks

Benchmark references

• Acceptance criterion: the slot comes online in I/O Builder with all configured points healthy, no ground fault or internal card alarms remain, and injected or forced values match the faceplate across the range.
• Stability target: bumpless primary to secondary switchover with no lost points and no control output jump, sustained over a 24 hour watch including cabinet HVAC cycling and large motor starts.