Digital guide
You are here:
GE DS3800HRMD
Product Name: GE DS3800HRMD Mark IV 8 kB Dual-Ported RAM Board
Product Introduction: The DS3800HRMD is a specialized 8 kB RAM memory board designed for GE’s Mark IV Speedtronic turbine control system. It provides essential dual-ported memory storage that enables simultaneous data access by multiple devices or processes, thereby improving the efficiency of data exchange and control logic execution in demanding industrial turbine control applications.
Detailed content
Technical Specifications:
- Product Type: 8K Dual-Ported Byte RAM Board
- System Compatibility: GE Mark IV Speedtronic
- Memory: 8 kilobytes (8,192 bytes) dual-ported RAM
- Channels: 12
- Component Count: Over 100 resistors, 35 orange diodes, 3 metallic diodes, 1 dark diode, 1 ruby diode, 6 light-blue diodes, 3 slim gold capacitors, 1 slim dark-blue capacitor, 1 tube-shaped gold capacitor, 3 tiny black semi-circle capacitors, 44 EPROMs and EEPROMs
- Configuration: 20 pairs of jumper ports with movable black covers for energy flow regulation; 1 small switch in plastic cover; 1 female wiring harness connector on one side, 2 smaller male connectors (one smaller than the other) on opposite edge; “SPARE” area for additional EPROM/EEPROM
- Board-to-Board Connection: Pair of clips and a small number of screws
- Operating Temperature: -30 °C to +55 °C
- Physical Size: 8.25 cm (H) × 4.18 cm (W)
Functional Features: Dual-ported architecture allows two independent devices to access memory simultaneously — one can write sensor data while another reads it for processing, eliminating data exchange bottlenecks; large EPROM/EEPROM complement holds the platform firmware; jumper ports allow field configuration of energy flow; the “SPARE” EPROM socket allows future firmware expansion.
Working Principle: The dual-port RAM acts as a shared data buffer between the Mark IV system’s processing elements and peripheral boards. Sensor data, control logic states, and inter-process communication data are stored in the 8 kB memory. The dual-port design permits true parallel access, reducing latency in time-critical turbine control loops. Revisions are applied by reprogramming the EPROMs through their miniature port.
Application Scenarios: Mark IV Speedtronic gas and steam turbine control systems; industrial automation and control applications requiring efficient dual-access data memory; complex control environments where rapid data exchange between system components is essential.
Installation & Precautions: Install into the designated Mark IV memory slot using the provided clips and screws; verify jumper cover positions match system configuration; handle EPROMs/EEPROMs with ESD precautions; operate within -30 °C to +55 °C; avoid physical shock to the board due to its numerous delicate components; ensure proper seating of all wiring harness connectors (1 female + 2 male).
