EMERSON 5X00226G02 Solid-State Relay Output Module – Clean, Durable Digital Switching for DCS Applications

The EMERSON 5X00226G02 is a solid-state relay (SSR) output module engineered for reliable digital actuation within Emerson control systems, typically the Ovation I/O platform. It’s designed to switch DC loads with no mechanical wear, delivering long service life and low maintenance in utility, oil & gas, and process environments. From my experience, it fits best where frequent cycling, noise immunity, and channel isolation really matter.

• Solid-state relay outputs – No moving contacts, which typically means higher switching endurance and quieter operation.

• Galvanic isolation – Helps protect the backplane/controller from field disturbances and ground potential differences.

• Fast, bounce-free switching – Useful for solenoids, lamps, and interposing relay coils where clean transitions reduce nuisance trips.

• Status indication – Front-panel LEDs (where fitted) assist with quick commissioning and troubleshooting.

• Backplane powered – Draws power via the Emerson I/O rack; no external power supply typically required for the module itself.

• System-native integration – Appears to be designed for Emerson DCS architectures, keeping configuration and diagnostics straightforward.

• Low maintenance – SSR architecture typically reduces replacement cycles compared with mechanical relay cards.

• Field wiring protection practices – Compatible with common suppression methods for inductive loads (diodes/RC snubbers) to extend life of connected devices.

You might notice that solid-state outputs shine in places where constant cycling and electrical noise are part of daily life. Typical applications include:

• Power generation: turbine auxiliaries, valve solenoids, lube and seal system interlocks

• Oil & gas: wellhead and separator skids, burner management outputs (non-safety), flare and utility skids

• Water & wastewater: pump starters, blower controls, chemical dosing relays

• Process industries: conveyors, light stacks, alarms, interposing relay coils for MCCs

• Infrastructure: HVAC dampers, access control signaling, remote I/O panels

A maintenance supervisor recently told us the SSR outputs “cut down nuisance relay replacements” on a brine dosing skid where outputs were cycling all day—exactly the use case this module seems to be built for.

• Reliability – No mechanical contact wear; stable performance even with frequent switching.

• Compatibility – Native fit within Emerson I/O racks, which typically simplifies engineering and spares management.

• Lower lifecycle cost – Reduced maintenance trips and fewer field replacements over time.

• Diagnostics – Visual channel status and controller-integrated alarms shorten downtime when issues arise.

• Supply continuity – Commonly used across many DCS cabinets, easing procurement and stocking strategies.

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• Cabinet & environment – Install in a ventilated industrial cabinet to maintain 0–60°C; keep humidity and airborne contaminants within control panel standards.

• Rack fitment – Seat the 5X00226G02 firmly into the Emerson I/O chassis, ensuring proper keying and backplane engagement.

• Field wiring – Land outputs on the designated termination assembly; observe polarity for DC loads and group commons as per the wiring diagram.

• Inductive suppression – Use diode or RC snubbers on solenoids and relays to minimize transients and heat stress on SSR channels.

• Grounding – Maintain a clean panel ground and segregate power and signal wiring to reduce noise coupling.

• Replacement – Module change-out can typically be performed during planned downtime; some systems support online replacement—follow your site’s Ovation procedures.

• Upkeep – Periodically check terminal tightness, clean dust filters, and review controller diagnostics/firmware release notes for any applicable updates.

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• Manufacturing quality aligned with ISO 9001 processes (typical for Emerson hardware)

• CE compliance and UL listing in most configurations; RoHS conformity on recent builds

• Traceable part numbers and revision control for regulated industries

• Standard manufacturer warranty—commonly 12 months from shipment

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