GE IS410SRLYS2A | Mark VIeS Simplex Relay Output Terminal Board

• Brand: GE
• Full Model Number: IS410SRLYS2A
• Associated Part Number: IS400SRLYS2ABB
• Product Type: Mark VIeS Simplex Relay Output Terminal Board
• Lifecycle Status: Active per GE technical documentation
• Core Function: 12-channel Form-C relay contact output interface
• Output Channels: 12 Form-C relay outputs
• I/O Pack: IS420YDOAS1B, 1 required
• Mounting: DIN rail
• Contact Rating: 0.6 A at 125 VDC; 1.2 A at 48 VDC; 2.25 A at 24 VDC; 2.25 A at 120/240 VAC
• Stock & Condition: Availability and physical condition to be confirmed by lot
• Shipping: Emergency dispatch subject to stock confirmation and order cutoff

GE’s documentation identifies IS410SRLYS2A as the SRLY terminal board for the Mark VIeS Functional Safety System. It provides 12 Form-C relay outputs and accepts one IS420YDOAS1B I/O pack. GE lists the board as active and safety-rated, with DIN-rail mounting and specified hazardous-location capabilities.

Obsolescence & Supply Chain Deep Dive

A failed relay terminal board can stop discrete actuator commands even when the main controller and application software remain serviceable. For a Mark VIeS installation, the GE IS410SRLYS2A is a dedicated simplex relay-output interface rather than a generic terminal assembly. The board provides 12 Form-C relay circuits, while isolated contact pairs provide relay-position feedback to the I/O pack. That architecture makes exact part-number verification important before procurement.

Replacing the failed board can preserve the existing control-system architecture and avoid the engineering, wiring, commissioning, and outage costs associated with a broader control-system change. TCO should include shutdown exposure, panel work, configuration verification, field labor, expedited freight, and the cost of maintaining a critical spare. GE’s specification identifies the IS410SRLYS2A as an active product, so procurement teams should distinguish a current replacement requirement from a true end-of-life migration project.

Compatibility & Replacement Matrix

GE documentation specifically associates with the SRLY terminal board and identifies IS420YDOAS1B as its required I/O pack. The documentation also lists optional WRO daughterboards that alter contact-wetting and fuse arrangements.

Field Traps — Watch Out

• I/O Pack Mismatch: Do not treat the terminal board as a standalone replacement without checking the installed IS420YDOAS1B. GE specifies this I/O pack for the SRLYS2A configuration.
• Daughterboard Configuration: The SRLYS2A can accept optional contact-wetting/fusing daughterboards. Confirm whether the existing installation uses an IS400WROBH1A, IS400WROFH1A, or IS400WROGH1A configuration before changing the board.
• Safety-System Application: Because GE identifies the SRLYS2A for the Mark VIeS Functional Safety System, substitutions should be reviewed against the site’s functional-safety documentation rather than approved solely on connector or mounting compatibility.

GE IS410SRLYS2A

Quality Assurance & Testing SOP

The pre-shipment inspection should treat the as a safety-system terminal board and document the exact physical unit supplied.

• OEM identification inspection: Verify GE markings, model designation, associated part-number markings, serial information, and terminal-board identification.
• OEM anti-counterfeit visual inspection: Examine PCB construction, terminal blocks, connectors, labels, fasteners, board finish, and component placement for signs of unauthorized alteration.
• Physical condition inspection: Check the enclosure, DIN-rail mounting structure, terminal blocks, connectors, and I/O-pack mounting interface.
• I/O pack interface inspection: Confirm the mounting and connector interfaces are clean, undamaged, and suitable for the specified IS420YDOAS1B.
• Relay-circuit inspection: Verify each of the 12 relay channels for continuity and correct contact-state behavior under the available test procedure.
• Contact feedback verification: Check the relay contact-feedback paths where the test fixture supports this function.
• Power and signal verification: Confirm applicable supply and signal paths against the GE specification before functional testing.
• I/O load testing: Apply representative loads within the specified relay ratings and monitor contact behavior for abnormal resistance, instability, or overheating.
• Daughterboard verification: Record whether an optional contact-wetting or fuse daughterboard is installed and document its exact part number.
• Final photographic record: Photograph the complete unit, nameplate, connectors, terminal blocks, and test identification before ESD-safe packaging.

GE specifies the SRLYS2A relay ratings as 0.6 A at 125 VDC, 1.2 A at 48 VDC, 2.25 A at 24 VDC, and 2.25 A at 120/240 VAC. Testing should remain within the applicable rating and site safety procedure.

Procurement & Lifecycle FAQ

Is the genuinely in stock, and what is the cutoff for emergency shipping?

Physical stock should be confirmed against the actual inventory lot before the PO is released. For emergency requirements, provide the quantity, destination, and required dispatch time so the available unit and shipping cutoff can be verified.

How do you verify the condition and authenticity of an obsolete or surplus ?

Each unit should be identified by its physical model and part-number markings, followed by visual inspection, connector inspection, relay-circuit testing, and photographic documentation. Condition should be stated separately as New Original, New Surplus, or Tested Refurbished.

Are there firmware compatibility issues engineers should check before issuing the PO?

The terminal board itself is not normally treated as a firmware-bearing controller. The engineering review should instead confirm the installed IS420YDOAS1B, Mark VIeS configuration, terminal assignment, safety application, and any installed WRO daughterboard. GE specifies as the I/O pack for .

Can IS400SRLYS2ABB be used as the same replacement designation as ?

Supplier listings commonly associate the two numbers, but the purchasing team should verify the physical nameplate and GE ordering documentation for the specific unit being quoted. GE’s own technical documentation identifies as the terminal-board part number.

What warranty and return terms should be included in the purchase order?

Specify the exact model, physical condition, serial number when applicable, warranty duration, DOA criteria, inspection period, and return authorization process. For a safety-system spare, acceptance criteria should also state that the supplied hardware must match the approved SRLY configuration before installation.