EMERSON 5X00226G01 Relay Output Module – Reliable Dry-contact Switching for Ovation DCS

The EMERSON 5X00226G01 is a relay output module used in Ovation distributed control systems to drive field devices that need electrically isolated, dry-contact switching. It’s typically chosen for actuating solenoids, interlocks, motor starters, beacons, and audible alarms where clean separation between control logic and field power is required.

From my experience, this module is a practical drop-in choice for brownfield upgrades where you want the stability of relay contacts without reworking existing field wiring. It seems to be favored in plants that value predictable behavior and straightforward diagnostics.

• Dry, isolated relay contacts – Helps protect the controller from field transients and allows switching of AC or DC loads using the same output point.

• Designed for Ovation backplane – Integrates with the Ovation I/O rack for streamlined wiring and native system diagnostics.

• Per-channel status indication – You might notice quick fault tracing thanks to on-card LEDs that typically mirror output state.

• Fail-safe behavior options – In many cases configurable through the control strategy so outputs go to a defined state on controller/comm loss.

• Contact agnostic to field power – Suitable for switching low-voltage DC to mains-rated AC via interposing circuits, as allowed by the contact rating.

• Serviceable in place – The plug-in card format usually allows quick replacement to minimize downtime during maintenance windows.

This module fits well in power generation (turbine and balance-of-plant interlocks), water/wastewater (pump and valve actuation), chemicals and petrochem (solenoid manifolds, ESD relays), mining and metals (conveyor interlocks, alarms), as well as cement and materials handling. You can route low-level control signals in the Ovation system to reliably switch higher-energy field circuits through the relay contacts.

One thing I appreciate is how it supports mixed loads across a single card—some customers switch 24 VDC solenoids on certain channels and use others as permissives to MCCs via interposing relays. A maintenance lead at a combined-cycle plant told us, “We swapped a 5X00226G01 during a hot standby and had the valve train back in service in under 20 minutes.”

• Compatibility – Native fit in Ovation racks reduces engineering effort; usually no adapters or custom wiring.

• Reliability – Relay isolation helps avoid ground loops and noise coupling that sometimes affect transistor outputs.

• Lifecycle support – EMERSON’s installed base means spares and service expertise are typically easy to source across regions.

• Cost control – Using dry contacts can offset the need for specialized field drivers; interposing relays only where the load requires it.

• Straightforward troubleshooting – Visible channel status and clear terminal mapping shorten outage time during fault isolation.

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• Panel & environment – Mount in a clean, ventilated control cabinet; keep ambient within typical industrial limits and away from vibration/condensation.

• Wiring – Use properly rated field conductors. Match load current/voltage to the relay contact ratings. For inductive loads (solenoids, coils), add suppression (flyback diodes or RC snubbers) to extend contact life.

• Earthing & separation – Maintain segregation between hazardous and SELV wiring. Keep field power returns off the logic ground.

• Commissioning – Verify fail-safe states in the Ovation strategy, then perform loop checks—monitor the card LEDs and the field device simultaneously.

• Routine care – Periodically actuate each channel during planned outages, check terminal torque, and inspect for contact wear symptoms (chatter, abnormal heating). Firmware/config backups should match the controller revision used on site.

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• Manufactured under ISO 9001 quality systems (EMERSON production standards).

• CE marking and UL recognition are commonly applicable to Ovation I/O modules; RoHS compliance is typical. Exact listings can vary by hardware revision.

• Standard manufacturer warranty is typically 12 months from shipment; extended coverage may be available on request.

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If you’re matching an existing installation, share the rack/base part number and any terminal base details. That small step usually ensures the 5X00226G01 lands as a true drop-in without rewiring surprises.