GE IS200WNPSH1ABA | WNPS Power Supply Daughter Card Mark VI

Description

GE IS200WNPSH1ABA MRP646180 In Stock Mark VI Power Card
GE IS200WNPSH1ABA Legacy WNPS Replacement Power Supply Card
GE IS200WNPSH1ABA Mark VI TVBA WNPS Power Supply Board
GE IS200WNPSH1ABA MRP646180 Original Surplus Fast Shipping

The 10-Second Procurement Snapshot

• Brand: GE General Electric
• Full Model Number: IS200WNPSH1ABA
• MRP Number: MRP646180
• Lifecycle Status: Legacy / Obsolete Spare
• Core Function: WNPS power supply daughter card for GE Mark VI turbine control
• System Application: Mark VI TVBA terminal board power architecture
• Power Conversion: DC power conversion for TVBA-related field circuitry, documented as −28 to 28 VDC conversion
• Redundancy: Three removable WNPS daughterboards can support redundant TVBA power supplies
• Service Concept: Individual WNPS cards can be removed from an online TVBA arrangement after disconnecting the associated I/O pack power path
• Board Type: Plug-in daughter card
• Stock & Condition: New Surplus / Unused inventory subject to physical stock confirmation
• Shipping: Emergency dispatch subject to confirmed inventory and carrier cutoff

GE’s Mark VIeS Functional Safety Manual identifies the WNPS as a power supply daughterboard associated with the TVBA and states that three redundant external supplies provide TVBA power through removable WNPS daughterboards. The same documentation describes the daughterboards as DC converters and explains the method for removing an individual WNPS from the online terminal-board arrangement.

Obsolescence & Supply Chain Deep Dive

A failed WNPS card can become a disproportionately difficult maintenance item because it belongs to the legacy GE Mark VI hardware family. The IS200WNPSH1ABA is identified as a GE Mark VI WNPS Power Supply Daughter Card, while current secondary-market inventories still list the exact assembly as available for replacement or surplus supply. The component is associated with the TVBA terminal-board power architecture rather than serving as a general-purpose PLC power module.

For a plant still operating the installed Mark VI architecture, retaining a tested WNPS spare can avoid the engineering work associated with replacing an entire terminal-board or control subsystem. GE documentation describes three removable WNPS daughterboards for redundant TVBA power, allowing an affected supply position to be serviced without necessarily taking the entire terminal board offline. That can reduce outage exposure and preserve existing wiring and cabinet infrastructure. (Actual maintenance time depends on the site’s isolation procedure, electrical permits, and whether the terminal board remains online during service.)

Compatibility & Replacement Matrix

Field Traps — Watch Out

TVBA association: WNPS is not a standalone universal power module. GE documentation places the daughterboard within the TVBA power architecture, so the installed terminal-board model must be confirmed before approval.

Revision matching: The is reported in the Mark VI spare-parts market with multiple revision variants, and the exact hardware suffix matters. Compare the complete board identification rather than approving a purchase from the shortened “WNPS” designation alone.

GE IS200WNPSH1ABA

Quality Assurance & Testing SOP

Each MRP646180 unit should pass a documented inspection sequence before shipment:

• OEM anti-counterfeit visual inspection: verify GE identification markings, part number, MRP reference, revision coding, PCB finish, connector condition, mounting holes, and component placement against the expected assembly.
• Part-number traceability: photograph the identification label and record all visible serial, revision, and assembly markings before packaging.
• PCB condition inspection: examine the board for corrosion, contamination, cracked laminate, damaged connectors, lifted components, loose hardware, and evidence of unauthorized rework.
• Power-path continuity testing: verify applicable connector and circuit continuity against the documented WNPS/TVBA architecture before applying power.
• Controlled power-up test: energize the card using an approved bench setup and confirm expected power-conversion behavior without connecting it to an operating turbine control loop.
• Output verification: measure the applicable DC conversion path and compare readings with the approved test specification for the particular board revision.
• Diagnostic verification: where installed system diagnostics are available, confirm that the WNPS position does not generate an abnormal power-supply fault after installation.
• I/O load testing: use representative test loads where applicable to confirm that the associated supply path remains stable under controlled demand.
• TVBA interface inspection: verify the daughterboard seating, mounting hardware, mating connector condition, and mechanical retention.
• Final QA release: retain test results, board photographs, identification records, and packing information as part of the shipment traceability file.

The testing objective is straightforward: confirm identity first, electrical condition second, and system-interface behavior third. A visual inspection alone is not sufficient for an obsolete power-supply daughterboard.

Procurement & Lifecycle FAQ

Is the GE MRP646180 genuinely in stock, and what is the cutoff for emergency shipping?
The exact part number appears in current secondary-market inventory records, including a published Mark VI spare-parts list showing as new-surplus inventory. Published availability from another supplier also identifies the part as in stock. These listings do not prove any particular warehouse’s live quantity, so emergency buyers should obtain a physical-stock confirmation, current unit photographs, and shipment cutoff before releasing the PO.

How do you verify the condition and authenticity of an obsolete or surplus unit?
Require confirmation of the complete identification, reference where marked, board revision, PCB condition, connectors, component integrity, and available traceability information. For unused surplus stock, pre-shipment photographs should document the actual unit rather than relying on catalog images.

Are there firmware compatibility issues my engineers should review before issuing the PO?
The WNPS is a power-supply daughterboard within the TVBA architecture, so the primary approval issue is hardware and terminal-board matching rather than a firmware flash on the WNPS itself. Verify the installed TVBA assembly, WNPS position, revision, and associated I/O-pack arrangement before purchase. GE documentation specifically identifies the WNPS as part of the TVBA redundant power arrangement.

Can one WNPS card be replaced without shutting down the entire terminal board?
GE’s Mark VIeS Functional Safety Manual states that the TVBA uses three removable WNPS daughterboards and describes replacement of an individual offline power supply by disconnecting the corresponding I/O pack power, one path at a time. Site safety rules, turbine operating conditions, and maintenance procedures determine whether this method is permitted for a specific installation.

What warranty and return terms should be included in the PO?
Specify the warranty period, DOA coverage, functional-failure coverage, RMA procedure, return inspection window, and identification requirements. For obsolete GE boards, record the supplied unit’s exact part number, revision, serial or traceability marking, and receiving-test results so the returned item can be matched to the shipment record.