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GE DS200SLCCG3A

Product Name:​ Mark V LAN Communications Card (SLCC)
Product Introduction:​ The DS200SLCCG3A is a LAN communication card manufactured by GE Fanuc for the Mark V Speedtronic turbine control system and associated drive lineups (including EX2000). It acts as the primary LAN control processor (LCP) interface, managing high-speed data exchange between the drive control processors and the broader ARCNET communication network, while offloading communication tasks from the main control processors to keep turbine control loops deterministic.
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Detailed content

Technical Specifications & Performance Parameters:
  • System Series:​ Mark V Speedtronic / DC2000 / EX2000
  • Functional Acronym:​ SLCC (Staged LAN Communication Card)
  • Revision:​ G3A (Group 3, Revision A)
  • Processor:​ 80196 microcontroller (dedicated LAN control processor U1)
  • Memory:​ Socketed EPROMs (U6, U7) for LAN firmware; RAM (U8, U9)
  • Communication Protocol:​ ARCNET (802.4)
  • Backplane Interfaces:​ 2PL, 3PL, KPPL connectors
  • Configuration Port:​ RS-232 serial port for local troubleshooting and drive configuration
  • Diagnostic Display:​ 16-position onboard alphanumeric display (controlled by U-18) plus LED status indicators for LAN link and processor health
  • Logic Voltage:​ 24 VDC (typical)
  • PCB Coating:​ Normal protective conformal coating
  • Operating Temperature:​ –40 °C to +70 °C
Functional Characteristics:​ The onboard 80196 microcontroller independently handles all packet management and token passing. The ARCNET port features built-in optical isolation to prevent ground loops and protect internal logic from high-voltage transients. The LAN station address is set via onboard DIP switches. Firmware is field-upgradable by physically replacing the socketed EPROM chips.
Application Scenarios:​ Gas and steam turbine control systems, heavy-duty industrial motor drives, DC2000 drive lineups, and EX2000 excitation systems — anywhere real-time operational data, alarms, and status updates must be shared between drive control processors and the operator interface or other control cores.
Working Principle:​ The dedicated LAN control processor manages all ARCNET communication streams independently. Data exchange between the LCP and the drive controller processor on the SDCC is facilitated through dual-ported RAM (U5), providing a deterministic buffer for real-time control synchronization.
Installation Requirements:
  • Ensure the control cabinet is de-energized and verified at zero energy before module removal or installation.
  • Utilize an ESD-protective wrist strap connected to a reliable earth ground.
  • Align the module with the designated rack slots and ensure the 2PL and 3PL connectors are fully seated.
  • If a programmer module is installed, ensure it is firmly attached to the KPPL connector.
  • Set the unique LAN ID / station address via DIP switches to match the site-specific communication map.
Usage Notes:
  • The G3A is an advanced revision of the SLCC series; while generally backward compatible, the LAN firmware version on the EPROM must match the drive’s software level. Transferring original EPROMs to the new board is recommended when matching a specific legacy configuration.
  • Frequent “LAN Link Failure” alarms or intermittent data dropouts on the HMI typically indicate a failing board.

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