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GE D20 M+SS Substation Controller
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- Part Number: D20 M+SS
- Brand: General Electric
- Type: Substation Controller
- Dimensions: 4x18.5x12.7cm
- Country of Origin: USA
- Barcode: 8537101190
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Additional Specifications
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Product Description
The GE Digital Energy D20 M+SS, also cataloged as the D20 M+SS Substation Controller, operates as a dedicated hardware component for data processing and automation algorithm execution within power substation networks.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | D20 M+SS |
| Brand | GE Digital Energy (General Electric) |
| Series | D20 / WESDAC |
| Origin | United States (US) |
| Weight | Configuration dependent (Varies based on card layout and module population) |
| Dimensions | 19" wide x 5.25" high x 8.1" deep (Standard rack-mount format) |
| Operating Temp | -20 to +70 deg C (-4 to +158 deg F) standard substation envelope |
| Power Consumption | Input options: 20-60 VDC, 100-300 VDC, or 85-264 VAC options |
| CPU Architecture | 32-bit microprocessor (D20ME II CPU Board execution core) |
| 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 |
| Physical Interfaces | Multiple RS-232/485 serial communication ports, Ethernet connectivity |
| I/O Module Capacity | Supports scaling up to a maximum of 120 distributed D20 I/O modules |
GE Digital Energy Industrial Control and Network Optimization
- Backplane Bus Communication Velocity Licences: The integrated 32-bit D20ME II CPU board drives high-speed parallel scanning across internal chassis lanes. It acts as a real-time data concentrator, capturing field signals from up to 120 remote digital, analog, or relay I/O boards, compiling them into a local system database within predictable, sub-millisecond execution loops.
- Profinet / EtherNet/IP Deterministic Networks: Outfitted with dedicated serial and Ethernet ports, the processor handles rapid protocol mapping routines. It parses raw asynchronous serial bytes (RS-232/485) and routes them into deterministic network streams, serving timestamped event records and substation telemetry data straight to up to date host computers.
Frequently Asked Questions
Q: What precise diagnostic steps occur when the D20 M+SS detects a data corruption event in its database?
A: The 32-bit processing core validates memory integrity continuously by evaluating hardware-level checksum profiles across the 1.5 MB SRAM and 512 KB NVRAM blocks. If a data integrity error or parity mismatch manifests, the CPU triggers a system fault flag, updates the internal system log database, and switches the module over to the standby controller card if redundant configurations are physically implemented.
Q: Can single I/O modules connected to the peripheral bus lines be live hot-swapped while the primary D20 chassis is running?
A: No. While the D20 network layout supports wide scaling up to 120 modules, the inter-module power rails and serial data cables lack localized isolation switches. Breaking or establishing terminal connections while the module bus lines are actively energized can distort data packets, damage the high-speed transceiver circuitry, or drop critical substation telemetry scans.
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