Description
- Brand: GE Digital Energy
- Full Model Number: D20EME10BASE-T 820-0474
- System/Series Family: Multilin D20/D200 / WESDAC
- One-Sentence Core Function: 10BASE-T Ethernet media-interface card for the D20 EME Ethernet memory architecture
- Top 3 Hardcore Specs: 10BASE-T Ethernet; IEEE 802.3; 10 Mbps
- Board Type: D20 EME Ethernet Media Interface Card
- Interface: 10BASE-T copper Ethernet
- Connector: RJ45 interface
- Network Speed: 10 Mbps
- Network Distance: Up to 100 m with appropriate twisted-pair cabling
- Installation: D20/D200 chassis or D20 EME expansion architecture
- PCB Identification: 526-2110-CC
- Board Revision Reported: 820-0474 Rev 00
- Conformal Coating: Epoxy-coated version available
- Stock Status: New Surplus / Fully Tested Refurbished subject to availability
GE Digital Energy documentation identifies the D20 EME 10BASE-T kit as an Ethernet media-interface option for the D20/D200 platform. The requested 820-0474 is also physically identified in field records as D20 EME 10BASE-T, PCB part number 526-2110-CC, with a reported board revision of 820-0474 Rev 00.
Module 3: Commercial-Technical Deep Dive
A failed Ethernet interface in a legacy D20 substation controller can isolate the substation automation system from an upstream SCADA or engineering network even though the D20 processor itself continues operating. The GE D20EME10BASE-T 820-0474 is associated with the D20 EME Ethernet memory/interface architecture and provides 10BASE-T copper Ethernet connectivity. GE’s D20/D200 product documentation lists the D20 EME 10BASE-T kit as a selectable Ethernet media-interface option, while field identification records associate the specific 820-0474 board with PCB number 526-2110-CC.
This is legacy Ethernet hardware, so interface identification matters more than modern network specifications. The 10BASE-T implementation operates at 10 Mbps, and the copper link should be treated as a D20/D200-specific network interface rather than a generic Gigabit Ethernet adapter. GE’s current D20/D200 documentation continues to list D20 EME 10BASE-T as part of the available chassis configuration options. One field note: some secondary listings incorrectly describe 820-0474 as a generic PLC module or associate it with unrelated newer GE PACSystems hardware; those descriptions should not override the D20 EME identification supported by GE’s D20/ documentation.
GE D20EME10BASE-T 820-0474
Module 4: Compatibility & Installation Traps
Migration/Compatibility
- System: GE Multilin D20/ Substation Controller
- Family: D20 EME / WESDAC
- Requested Model: D20EME10BASE-T 820-0474
- PCB Identifier: 526-2110-CC
- Interface Type: 10BASE-T Ethernet
- Network Speed: 10 Mbps
- Ethernet Standard: IEEE 802.3
- Module Role: Ethernet media-interface card for D20 EME architecture
- Installation: D20/ chassis / applicable D20 EME slot arrangement
- Replacement Type: Exact 820-0474 / 526-2110-CC match preferred
- Network Configuration: Preserve existing D20 Ethernet addressing and system communication parameters
- Logic Rewrite: Normally not required for a like-for-like Ethernet interface replacement; network and D20 configuration should still be validated
⚠️ Field Traps (Watch Out)
1. Do not mistake the 820-0474 board for a modern Ethernet module.
GE’s D20/ documentation identifies this option specifically as a D20 EME 10BASE-T interface. The supported link is legacy 10BASE-T Ethernet, not a 100 Mbps or Gigabit replacement interface.
2. Verify the PCB number as well as the catalog identifier.
Field records identify the board as 526-2110-CC and report the marking 820-0474 Rev 00. Because legacy D20 boards can carry multiple identification numbers, both should be captured during procurement and receiving inspection.
3. Check the complete D20 chassis configuration.
GE’s D20/ architecture uses specific processor, Ethernet/memory, modem, and power-supply slot options. A correct interface card must be installed in the appropriate D20/ assembly position; do not treat it as a standalone RJ45 adapter.
4. Do not diagnose every Ethernet alarm as a board failure.
Before replacing the card, verify the RJ45 patch cable, link partner, network parameters, chassis seating, and D20 configuration. Legacy 10BASE-T links can also be affected by cable condition and network-interface negotiation behavior.
Module 5: Quality Assurance SOP
Each available GE D20EME10BASE-T 820-0474 should pass a documented legacy-network interface inspection before shipment:
- OEM anti-counterfeit visual inspection: Verify GE identification, D20EME10BASE-T, 820-0474, and 526-2110-CC markings where present.
- Revision verification: Record the visible board revision, including the reported 820-0474 Rev 00 designation where applicable.
- PCB condition inspection: Check for corrosion, contamination, cracked components, damaged traces, thermal discoloration, loose components, and evidence of previous repair.
- Connector inspection: Examine the RJ45/interface connector and all board-to-chassis connections for bent contacts, oxidation, mechanical damage, or poor retention.
- Conformal-coating inspection: Where the board is epoxy coated, check the coating for cracks, delamination, moisture intrusion, and contamination.
- Power precheck: Perform controlled resistance and continuity checks before chassis installation.
- Power-on self-test (POST): Install the card in an approved D20/ test chassis and verify expected initialization.
- Ethernet link verification: Connect the card to a controlled 10BASE-T test network and verify link establishment.
- 10 Mbps communication test: Confirm reliable packet transmission and reception at the intended 10 Mbps operating rate.
- RJ45 interface test: Verify the physical interface and cable continuity using approved Ethernet test equipment.
- D20 controller handshake verification: Connect the interface to a compatible D20/WESDAC processor and confirm expected network communication.
- Data-transfer test: Exchange controlled test packets and verify that no abnormal packet loss or repeated link drops occur.
- Network fault test: Disconnect the controlled link partner and verify the expected link-status behavior.
- Chassis integration check: Verify correct recognition and operation in the intended D20/ configuration.
- Final QC record: Record catalog number, PCB number, revision, chassis/test fixture, link speed, communication results, and technician sign-off.
- ESD-safe packaging: Package the board in ESD-protective material with rigid protection for the RJ45 connector and PCB edges.
The most meaningful functional test is D20-to-network data exchange at the intended 10BASE-T interface, not merely a continuity check. Because the module is part of a legacy substation communications architecture, the QC report should identify the exact D20/ test environment used.
Module 6: CRO-Driven Buyer FAQ
What is GE D20EME10BASE-T 820-0474?
It is a D20 EME 10BASE-T Ethernet media-interface card associated with GE’s Multilin D20/ substation-controller architecture. Field identification records associate the 820-0474 board with PCB number 526-2110-CC.
What Ethernet speed does the 820-0474 support?
The requested board is specifically identified as 10BASE-T, providing 10 Mbps Ethernet connectivity. It should not be represented as a 100 Mbps or Gigabit Ethernet interface.
Is 820-0474 a D20 controller CPU?
No. The strongest GE documentation identifies the D20 EME 10BASE-T item as an Ethernet media-interface card. The D20/ chassis has separate processor, Ethernet/memory, modem, power-supply, and interface options.
Is 820-0474 the same as 526-2110-CC?
Field inventory records identify the physical board as P/N 526-2110-CC with 820-0474 Rev 00 marking. Both identifiers should be captured when matching a replacement, particularly for legacy D20 inventory.
Can the be replaced while the D20 is powered?
Do not assume live removal is permitted. The card is part of a substation automation communication assembly. Follow the approved D20/ maintenance procedure and isolate the applicable power before removing or installing the board.
What should I verify before ordering 820-0474?
Confirm the complete identification, PCB number 526-2110-CC, board revision, D20/ chassis position, Ethernet cable/interface type, and existing network configuration. A clear photograph of the board label is particularly useful for legacy replacement matching.
What warranty and technical support should I expect?
Warranty duration should be stated for the exact unit condition and test status on the quotation. Technical support should cover part-number verification, D20/ chassis compatibility, 10BASE-T interface testing, network checks, and documented bench-test results. Substation network engineering, RTU configuration, and SCADA commissioning should be treated separately unless explicitly included.
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