Description

The GE UR6AV(official part number:336A5028G006)is a 16-channel universal relay output module designed for the GE Speedtronic™Mark VIe turbine control and protection system.It serves as a critical interface between the Mark VIe’s digital logic solvers and field-mounted final control elements—such as fuel valves,lube oil pumps,vent solenoids,and emergency shutdown devices.

Unlike solid-state outputs,the GE UR6AV uses electromechanical relays with Form-C(SPDT)contacts,providing galvanic isolation,high-voltage switching capability,and inherent fail-safe behavior—making it ideal for safety-critical and high-power auxiliary circuits in power generation and industrial turbine applications.

Application Scenarios

During a black-start test at a combined-cycle power plant in Texas,operators initiated an emergency trip sequence to validate turbine protection logic.Within 12 milliseconds,the Mark VIe system commanded the GE UR6AV modules to de-energize fuel shutoff valves and activate fire suppression solenoids.Despite years of exposure to vibration,humidity,and thermal cycling,all 16 relays per GE UR6AV operated flawlessly—confirmed by real-time contact feedback signals sent back to the controller.Post-test inspection revealed zero contact welding or coil degradation.This reliability under stress is why the GE UR6AV remains the go-to output solution for life-safety and asset-protection functions where semiconductor-based outputs might fail silently.

Parameter

Main Parameters Value/Description

Product Model GE UR6AV

Official Part Number 336A5028G006

Manufacturer General Electric(GE Power/GE Vernova)

Product Category Universal Relay Output Module(I/O Termination Board)

Compatible System GE Speedtronic Mark VIe(including Mark VIeS and Mark VIeR)

Number of Outputs 16 independent Form-C(SPDT)electromechanical relays

Contact Rating 5 A 250 VAC/30 VDC(resistive load)

Coil Voltage 24 VDC(supplied by Mark VIe I/O pack)

Isolation Galvanic isolation between logic and field sides(>2.5 kV)

Arc Suppression Built-in snubber circuits for inductive load protection

Diagnostics Optional contact status feedback(via separate FB module or wiring)

Mounting Snap-in carrier for Mark VIe I/O terminal packs(e.g.,PTBA,PTCB)

Operating Temperature-20°C to+70°C(suitable for turbine skid environments)

Certifications CE,UL,CSA,IEC 61508(when used in certified SIF architectures)

Technical Principles and Innovative Values

Innovation Point 1:True Fail-Safe Behavior via Electromechanical Design

The GE UR6AV’s relays default to a known safe state(typically“de-energized=trip”)during power loss or controller failure—unlike solid-state outputs that may latch or float.This passive safety aligns with IEC 61511 requirements for Safety Instrumented Functions(SIFs).

Innovation Point 2:Modular Integration in Mark VIe’s Distributed I/O Architecture

The GE UR6AV mounts directly onto standardized terminal base adapters(TBAs),enabling rapid replacement without rewiring.Combined with Mark VIe’s redundant IONet communication,this supports hot maintenance in live turbine environments.

Innovation Point 3:Robustness Against Real-World Electrical Stress

Each relay includes RC snubbers and flyback diodes to suppress voltage spikes from inductive loads(e.g.,solenoid valves).This extends contact life by>10×compared to unprotected relays in similar duty cycles.

Innovation Point 4:Diagnostic Extensibility for Predictive Maintenance

While basic versions lack built-in feedback,the GE UR6AV can be wired to optional feedback boards(e.g.,FB6AV)to monitor actual contact position—enabling detection of welded or failed relays before they compromise safety logic.

Application Cases and Industry Value

At a European waste-to-energy plant,frequent nuisance trips were traced to degraded solid-state outputs failing to fully open combustion air dampers.Engineers replaced them with GE UR6AV modules,leveraging their positive-break contact action and arc resistance.Over 18 months,unplanned outages dropped by 90%,and maintenance costs fell due to longer service intervals.Plant managers noted:“The click of a GE UR6AV relay is the sound of certainty.”

In another case,a Middle Eastern LNG facility upgraded its gas turbine auxiliaries to SIL2 compliance.The GE UR6AV,integrated into a certified Mark VIeS Safety system,provided the necessary hardware fault tolerance and diagnostic coverage—allowing the client to meet regulatory mandates without replacing the entire control platform.

Related Product Combination Solutions

GE FB6AV(336A5029G006):Feedback module that monitors actual contact status of GE UR6AV relays for enhanced diagnostics.

GE PTBA/PTCB Terminal Base Adapters:Mounting carriers that house the GE UR6AV and connect to field wiring via screw terminals.

GE Mark VIe IONet Modules(e.g.,VCMI,VPRO):Core controllers that send output commands to GE UR6AV via deterministic Ethernet.

GE UR6BV(336A5028G007):Alternate version with different contact configuration or coil specs—verify compatibility before substitution.

GE IC693MDL754:For hybrid systems integrating legacy Series 90-30 PLCs with Mark VIe,used in auxiliary balance-of-plant controls.

GE ToolboxST Software:Configuration and diagnostics suite for monitoring GE UR6AV command states and troubleshooting output paths.

GE 336A5030G001:Spare terminal block kit—ensures quick field replacement when upgrading or repairing GE UR6AV installations.

GE Mark VIeS Safety Controller:When deployed in safety applications,the GE UR6AV acts as the final element driver in a full SIL2-certified loop.

Installation,Maintenance,and Full-Cycle Support

The GE UR6AV installs by snapping onto a compatible terminal base adapter(TBA)already wired to field devices.No tools are needed for module replacement—simply lift the release tab and insert a new unit.Wiring remains untouched,minimizing outage time.Ensure ambient conditions stay within-20°C to+70°C and avoid condensation during cold startups.

Routine maintenance includes visual inspection for contact pitting,coil discoloration,or loose terminals.Although not required,periodic functional testing(e.g.,exercising relays during planned outages)is recommended for safety-critical loops.If used with feedback(FB6AV),monitor diagnostic alarms for“command vs.actual”mismatches.

We supply only genuine GE UR6AV(336A5028G006)modules sourced from GE-authorized channels or vetted surplus inventory.Every unit undergoes continuity testing,coil resistance verification,and mechanical actuation checks.Backed by a 12-month warranty and supported by engineers with direct Mark VIe field experience,we ensure your turbine protection system remains uncompromised.

Contact us for a customized solution—whether you’re commissioning a new turbine,executing a life-extension upgrade,or securing critical spares to avoid forced outages in your power generation fleet.