DS200SLCCG1AEF: LAN Communication for the Mark V

DS200SLCCG1AEF is a G1-group SLCC – the LAN Communication Card used across GE's Speedtronic Mark V turbine control system and EX2000 excitation cabinets. Some resellers and GE documentation cross-reference SLCC cards using an alternate DS215 assembly number (this unit's listing references DS215SLCCG1AZZ01A alongside the DS200 part number); if your card's label shows the DS215 designation, treat it as referring to the same SLCC family, but confirm the full string against your own documentation before ordering, since we do not have a confirmed one-to-one mapping between every DS200 and DS215 SLCC suffix.

Functionally, the SLCC processes and filters incoming LAN communication signals using isolated and non-isolated circuits, built around a LAN Control Processor (LCP, U1) whose software resides in two replaceable EPROMs (U6/U7) with dedicated RAM at U8/U9. A dual-ported RAM at U5 lets the LCP exchange data with the drive control processor on the SDCC card through connector 3PL, and an attachable alphanumeric keypad/display module supports on-card diagnostics and fault-code readout. The card sits in the Mark V's <C> (communication) core and connects to the NTB/3TB, SDCC, TCCB, and DCFB boards via a 2PL connector. As a G1-group card, it includes DLAN and ARCNET network adaptation circuitry that GE later dropped entirely from the G4 group.

Before You Order: What Actually Causes SLCC-Type Faults

SLCC symptoms are some of the easiest on a Mark V panel to misdiagnose. In a documented field case, an operator interface stopped updating live data – and the site replaced every card in the <C> core, including the SLCC, TCCA, SDCC, and TCDA, plus the TCPS power supply card. The fault remained. What eventually helped:

• Power supply voltages at the <R> and <C> test points, checked against the Mark V Maintenance Manual (GEH-5980) limits
• The BOI (backup operator interface), which talks to <R> directly without routing through <C> – useful for isolating whether the fault is truly a communications problem
• Connector corrosion or a broken wire, checked before any card was condemned
• The TCQC card in <R> and the ARCPL cable connecting it to the <C> core's SLCC – a fault here produces the exact same symptoms as a bad SLCC

It's also worth knowing that a processor core only reaches I/O status A7 once every card in it individually reaches A6 – so before you condemn the SLCC, check which specific card in the <C> core is actually holding back that progression.

What This Part Number Tells You

DS200 is the Mark V-era board series prefix, SLCC is the LAN Communication Card acronym, G1 is the product grouping (DLAN and ARCNET circuitry included), and EF is this unit's specific functional and artwork revision combination. Because SLCC groups reflect genuine hardware differences and not simply a chronological sequence, match the complete part number – and cross-check any alternate DS215 label reference – against your system documentation before ordering.

Related Boards and Longer-Term Alternatives

The SLCC shares its <C> core with TCCA, SDCC, IOMA, and TCDA, and links back to <R> through the TCQC card. For sites considering a platform change, GE's Mark VI system replaced the DS200 series with IS200-series boards and a different communications architecture; see our Mark V vs Mark VI: DS200 to IS200 guide. For how GE structures its Speedtronic part numbers, see the GE Speedtronic Part Number Decoder, and for the SLCC's place among other DS200 boards, see GE Mark V DS200 Boards Explained.

What to Send With Your Quote Request

• The complete part number and suffix, e.g., DS200SLCCG1AEF (and any DS215 cross-reference on the label)
• A photo of the label
• Turbine model and whether the panel is Mark V or EX2000
• Quantity needed
• Urgency – planned outage or active fault

Request a Quote

This DS200SLCCG1AEF is offered used, clean and tested, with a 1-year warranty (see below). Pricing isn't published online since Mark V board quotes depend on exact revision match and current stock – submit a Request a Quote and expect a reply within 24 hours. We ship worldwide DDP, accept purchase orders, and support both planned outages and urgent turbine-down orders.

General Information about the Product
Part Number	DS200SLCCG1A Mark V DS200
Description	GE General Electric DS200SLCCG1A DS200SLCCG1AEF DS215SLCCG1AZZ01A Speedtronic PC Communication Board
Condition	used Clean and Tested. With 1 Year Warranty