D20 ME Overview

The D20 ME MAIN PROCESSOR CARD General Electric II is a 32-bit main processor module for D20 substation controllers. It features 2 MB flash memory, 7 serial ports, and self-diagnostics for reliable SCADA data concentration and automation.

Specifications

Processor Architecture: 32-bit microprocessor with 2 MB flash application memory, 1.5 MB SRAM, and 512 KB NVRAM for robust data handling.

Clock Accuracy: TCXO clock with 1.0 ms resolution accurate to ±2 ppm for precise time-stamping.

Serial Communications: 7 RS-232/485 serial ports plus dedicated RS-232 maintenance port for flexible connectivity.

I/O Interface: 2 D.20 Link HDLC ports for high-speed communication to D20 I/O modules.

Network Ready: Wireless Ethernet ready with PPP/TCP/IP protocol support for modern integration.

Comprehensive Diagnostics: Includes program memory checksums, RAM test, watchdog timer, power monitor, and I/O module health checks.

FAQ

Q1: What is the D20ME II CPU Board?

A1: It is the sixth-generation 32-bit main processor module for the D20 platform, handling data collection, local automation algorithms, and maintaining I/O and device data.

Q2: What are the key memory specifications?

A2: It features 2 MB flash application memory, 1.5 MB SRAM, 512 KB NVRAM, and 1 MB BootROM for robust data processing and storage.

Q3: What communication ports are available?

A3: It includes 7 RS-232/485 serial ports, one RS-232 maintenance port, and 2 D.20 Link HDLC ports for I/O module communication, plus wireless Ethernet readiness with PPP/TCP/IP.

Q4: What self-diagnostics capabilities does it have?

A4: It performs program memory checksums, RAM tests, configuration verification, interrupt controller verification, serial port tests, watchdog monitoring, and I/O module health checks.

Q5: What is the clock accuracy and resolution?

A5: It features a TCXO clock with 1.0 ms resolution accurate to ±2 ppm for precise time-stamping and synchronization.