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- GE WESDAC D20ME VME Main Processing Module
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GE WESDAC D20ME VME Main Processing Module
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- Part Number: WESDAC D20ME
- Brand: General Electric
- Type: VME Main Processing Module
- Dimensions: 4x18.5x12.7cm
- Country of Origin: USA
- Barcode: 8537101190
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Additional Specifications
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وصف المنتج
The GE WESDAC D20ME, also cataloged as the D20ME Processing Module, operates as a central processing unit for data concentration, high-speed protocol translation, and real-time automation logic execution within VMEbus-based industrial and power substation automation platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | D20ME |
| Brand | GE (General Electric / Wescom) |
| Series | WESDAC / D20 Series |
| Origin | United States (US) |
| Weight | Standard VME slot-enclosure allocation metrics |
| Dimensions | 19" rack-mount chassis configuration / Single-slot VME profile |
| Operating Temp | 0 to +55 deg C (+32 to +131 deg F) functional window |
| Storage Temp | -40 to +70 deg C (-40 to +158 deg F) |
| Humidity | 5% to 95% relative humidity, non-condensing |
| Vibration Resistance | 5 to 2,000 Hz at peak acceleration of 5 g |
| Shock Threshold | 10 g, half-sine wave, over an 11 ms duration interval |
| Power Requirements | Input options: 20-60 VDC, 100-300 VDC, or 85-264 VAC source rails |
| Flash Memory | 2 MB flash application memory |
| SRAM | 1.5 MB static random-access memory (volatile) |
| NVRAM | 512 KB non-volatile random-access memory |
| BootROM | 1 MB integrated boot read-only memory |
| Serial Interfaces | 7 RS-232/485 serial ports / 1 RS-232 maintenance port (dedicated) |
| I/O Bus Interface | 2 D.20 Link HDLC ports for localized peripheral expansion |
GE Industrial Control and Backplane Execution
- Backplane Bus Communication Velocity Licences: The main processing module synchronizes peripheral tracking loops over parallel VMEbus lines and dual High-Level Data Link Control (HDLC) D.20 Link ports. It acts as a real-time data concentrator, capturing field telemetry inputs from downstream boards and updating the central system database within deterministic sub-millisecond execution cycles.
- Profinet / EtherNet/IP Deterministic Networks: Outfitted with an integrated network configuration layer, the D20ME supports the PROFIBUS DP protocol to accelerate high-speed fieldbus productivity. The 32-bit computing architecture translates raw asynchronous serial data streams from its 7 onboard ports into structured, deterministic network packets equipped with advanced system diagnostic hooks.
Frequently Asked Questions
Q: What self-diagnostic steps does the D20ME perform to safeguard program integrity?
A: The module runs continuous automated background checks, including memory checksum verifications across the 2 MB flash application space, runtime read/write validation tests inside the 1.5 MB SRAM, and strict user configuration file audits. If a memory cell corruption or parity exception manifests, the module flags a diagnostic fault to prevent corrupt logic from executing.
Q: Can peripheral I/O lines connected to the D.20 Link ports be modified while the D20ME is actively processing substation logic?
A: No. Modifying physical interface lines while the HDLC ports are actively scanning will disrupt serial synchronization loops, cause immediate communication timeouts, and inject bad data attributes into the active database. Always place dependent logic blocks into test mode or isolate the module's power supply before altering signal wiring.
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