GE DS200SLCCG3AGH | Mark V LAN Board | Turbine Communication Troubleshooting

Description

GE DS200SLCCG3AGH | Mark V SLCC LAN Communication Board

Key Technical Specifications

The SLCC architecture includes an onboard LAN Control Processor that handles communication processing separately from the main drive-control processor. Its LCP software is stored in two replaceable EPROMs, while dedicated RAM and dual-port RAM provide local processing and host-processor communication functions.

The DS200SLCCG3AGH designation identifies functional revision A, hardware group 3, and artwork revision H. The available exact-part reference states that the first two revisions are compatible with each other, while the artwork revision should not be treated as interchangeable merely because the base SLCC number matches.

DS200SLCCG3AGH

Product Introduction

The GE DS200SLCCG3AGH is a LAN Communication Board used in GE Mark V Speedtronic turbine-control and associated EX2000 applications. The SLCC provides the communication-processing layer for the control system, using an onboard LAN Control Processor to manage incoming and outgoing communication traffic while maintaining an interface with the host control processor.

This board is more than a passive network interface. It contains its own processor, memory, programmable firmware storage, dual-port RAM, communication circuitry, and a local alphanumeric programmer interface. That architecture makes the exact hardware and EPROM configuration important when replacing a failed board in an operating Mark V cabinet.

Engineering Pain Point

SLCC failures can present as communication faults even when the physical LAN wiring is intact. A defective LCP, corrupted or mismatched EPROM set, failed RAM interface, or problem in the board-to-host connection can interrupt communication between the control processor and connected Mark V equipment. Troubleshooting should therefore separate the external network path from the SLCC’s internal processing and host-interface functions.

Typical Applications

• Mark V turbine control: Provides LAN communication processing within GE Speedtronic turbine-control cabinets.
• EX2000 excitation systems: Used in applicable GE EX2000 control architectures requiring the SLCC communication function.
• Drive communication: Interfaces communication between the host drive-control processor and connected control-system hardware.
• Maintenance diagnostics: The local alphanumeric display and programmer interface provide access to board-level status, configuration, and diagnostic information.

Technical Pitfalls to Avoid

1. Do not treat the SLCC as a generic Ethernet card. Its LCP, EPROM, dual-port RAM, and Mark V-specific interfaces make it part of the control architecture rather than a conventional network adapter.
2. Match the complete part number. For this unit, DS200SLCCG3AGH includes the G3 hardware group and H artwork revision. Matching only “DS200SLCCG3A” is not sufficient for a controlled replacement.
3. Check the EPROM set. The LCP software is stored in replaceable EPROMs U6 and U7. A board with different firmware contents can produce a hardware-compatible appearance while behaving differently in the installed system.
4. Verify the host-board relationship. The SLCC communicates with the drive-control processor through dual-port RAM. A communication failure should therefore be investigated across both the SLCC and the host control board rather than automatically replacing the LAN board.
5. Record the programmer configuration. The attached programmer module and alphanumeric display form part of the local service interface. Capture existing diagnostic information before removing a suspect board where system conditions permit.
6. Do not assume all SLCC revisions are interchangeable. The available exact-part documentation specifically distinguishes the three revision fields and states that the first two functional revisions are compatible while the artwork revision is not automatically interchangeable.
7. Do not copy generic temperature or power figures from reseller pages. Published secondary specifications vary. For cabinet-level limits, use the applicable GE manual and the actual Mark V installation documentation.

Related Products

• DS200SLCCG3A — Base G3A SLCC LAN Communication Board designation; the shorter designation does not by itself establish equivalence to the complete G3AGH configuration.
• DS200SLCCG3ACC — Related G3A SLCC configuration; verify functional and artwork revisions before substitution.
• DS200SLCCG3ADC — Another G3A SLCC configuration; compare EPROM and hardware revision details.
• DS200SLCCG3AEF — Related SLCC LAN communication configuration with a different complete suffix.
• DS200SLCCG3AFG — Another G3A SLCC configuration requiring complete-part-number verification.
• DS200SLCCG3AHB — Related SLCC communication-board configuration; do not substitute based only on the SLCC acronym.
• DS215SDCC — Mark V Drive Control Card containing the drive-control processor that communicates with the SLCC through the dual-port RAM interface.
• TCCB — Mark V Common Analog I/O Board associated with the SLCC communication architecture.
• DCFB — Mark V drive/control interface board referenced in the SLCC interconnection architecture.

Procurement and Replacement Note

For DS200SLCCG3AGH, specify the complete GE part number, including G3A functional identification and H artwork revision. Before replacement, document the EPROM labels, programmer/keypad arrangement, board jumpers, connectors, and any displayed diagnostic codes.

The most important compatibility checks are the Mark V/ application, host control board, LCP firmware/EPROM set, and complete SLCC revision. A board carrying the same SLCC functional acronym can still require configuration or hardware verification before it is suitable for the installed control system.