Description

IS410SRLYS2A:A 16-channel electromechanical relay output module for the Mark VIe distributed control system.It provides dry,isolated contacts for switching loads up to 2 A 250 V AC or 2 A 30 V DC,commonly used to energize solenoids,motor starters,alarm horns,and trip relays.Designed with channel-level diagnostics,hot-swap support,and compatibility with redundant I/O packs,it meets requirements for safety-related functions(up to SIL 2 when architected appropriately).

IS400SRLYS2ABB:The Mark VI predecessor to the IS410 series—also a 16-channel relay output card,but used in the older Speedtronic Mark VI controllers.While lacking some advanced diagnostics of the VIe version,it remains widely installed and supported.Both modules feature removable terminal blocks and per-channel LED indicators for visual status.

These modules serve as the final electrical interface between the turbine control logic and field devices,translating digital commands from the controller into physical switching actions.

Application Scenarios

At a 700 MW combined-cycle plant in California,operators experienced intermittent failure of lube oil pump start signals during black-start sequences.Investigation revealed contact oxidation on an aging IS400SRLYS2ABB module.The plant upgraded to IS410SRLYS2A modules in their Mark VIe retrofit.The new modules’contact health monitoring detected rising coil resistance during routine self-tests,triggering a predictive maintenance alert before failure occurred.Additionally,the hot-swap capability allowed replacement during operation—avoiding a 12-hour outage.Over two years,relay-related faults dropped by 90%.

Key Parameters

Parameter IS410SRLYS2A(Mark VIe)IS400SRLYS2ABB(Mark VI)

Channels 16 electromechanical relays 16 electromechanical relays

Contact Rating 2 A 250 V AC/30 V DC(resistive)Same

Contact Type Form C(SPDT)–dry contacts Form C(SPDT)

Isolation 2500 V RMS between logic and field~1500 V(basic isolation)

Diagnostics Coil OK/fail,contact weld detection,open circuit Basic LED per channel;no electronic diagnostics

Hot-Swap Yes(in VIe redundant I/O packs)No–requires system power-down

Mounting Snap-in to Mark VIe I/O pack(DIN rail)Screw-mounted in Mark VI chassis

LED Indicators Green=Powered;Red=Fault per channel Single bi-color LED per channel(On/Off only)

Operating Temp 0°C to+60°C 0°C to+55°C

Certifications CE,UL,CSA,RoHS UL,CSA(legacy compliance)

Technical Principles&Innovation

Fail-Safe Design:Both modules use force-guided(positively driven)relays,ensuring that if a contact welds shut,the associated normally closed(NC)contact cannot close—critical for safety circuits(per EN 50205).

Mark VIe Diagnostic Integration:The IS410SRLYS2A reports real-time relay health to the Mark VIe controller,enabling predictive maintenance and reducing unplanned downtime.

Seamless Migration Path:Plants upgrading from Mark VI to Mark VIe can often reuse field wiring,as terminal pinouts are similar—though the IS410SRLYS2A requires a VIe I/O pack and backplane.

High Inrush Tolerance:Contacts are rated for brief inrush currents(e.g.,solenoid coils),making them ideal for turbine trip solenoids and hydraulic valve actuation.

Related Product Combinations

GE IS410TCQD2A:Thermocouple input module–pairs with IS410SRLYS2A in temperature-based trip logic.

GE IC695CPU320:Not applicable—Mark VIe uses VCMI/VPRO controllers,not PACSystems.

GE Mark VIe I/O Pack(e.g.,P/N 336A5932G001):Required carrier for IS410SRLYS2A.

GE IS400TCQA2A:Analog input card for Mark VI—used alongside IS400SRLYS2ABB.

Emerson ROC800:For remote BOP monitoring—can offload non-critical relay functions.

Phoenix Contact REL-MR-…:Third-party relay alternatives—but lack turbine-specific certification and diagnostics.

⚠️Note:While third-party relays exist,GE/Emerson strongly recommends OEM modules in turbine protection circuits due to rigorous validation for vibration,thermal cycling,and EMI in power plant environments.

Installation&Maintenance

Installation:

IS400SRLYS2ABB:Insert into Mark VI chassis,secure with screws,connect field wires to screw terminals.

IS410SRLYS2A:Slide into Mark VIe I/O pack until it clicks;field wiring connects to removable pluggable terminal block.

Maintenance:

IS400SRLYS2ABB:Visual inspection of LEDs;manual testing with multimeter during outages.

IS410SRLYS2A:Monitor“Relay Health”tags in ToolboxST™software;replace during online operation if fault flagged.

Both modules have an expected service life of 100,000+operations under normal load conditions.

Lifecycle&Support Status

IS400SRLYS2ABB:Legacy/end-of-life—still supported via Emerson’s long-term service program,but new production has ceased.

IS410SRLYS2A:Active product—fully supported in current Mark VIe deployments and upgrades.

As an authorized Emerson partner,we maintain tested,traceable inventory of both modules—including factory-new NOS(New Old Stock)for IS400SRLYS2ABB and current-production IS410SRLYS2A units.All modules undergo functional verification,including contact resistance and coil activation tests.

Final Recommendation

Use IS410SRLYS2A for new installations,retrofits,or critical spares where diagnostics and hot-swap are required.

Use IS400SRLYS2ABB only for direct replacement in existing Mark VI systems where upgrade is not feasible.

🔧Pro Tip:When replacing IS400SRLYS2ABB,consider a full migration to Mark VIe—it unlocks cybersecurity updates,remote diagnostics,and extended hardware support through 2035+.

Contact us for genuine,tested modules with warranty,technical datasheets,and integration support for your GE turbine control system—whether maintaining a legacy fleet or modernizing to Mark VIe.

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