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WESDAC D20 ME II

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The GE WESDAC D20 ME II CPU Board is a high-performance processor for D20 and D200 systems, delivering enhanced communication speeds, flash-based application memory, and versatile connectivity options.
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Technical specifications for WESDAC D20 ME II

  • Manufacturer:
    General Electric
  • Part Number:
    WESDAC D20 ME II
  • Product Family:
    GE Mark VIe Distributed I/O
  • Power Supply:
    20-60VDC; 100-300VDC/85-264VAC.
  • Media Types:
    10 Base-T,10 Base 2,10 Base-FL
  • Memory Options:
    0 MB,8 MB,or 16 MB battery-backed SRAM
  • CPU and Memory:
    32-bit microprocessor architecture; 2 MB flash application memory; 1.5 MB SRAM; 512 KB NVRAM; 1 MB BootROM; TCXO clock, 1.0 ms resolution, accurate to ±2 ppm.
  • Power Requirements:
    5 VDC,2.5W typical, 5W maximum
  • Physical:
    Power Requirements 5 VDC,2.5W typical, 5W maximum
  • Weight:
    0.8 kg
  • Estimated shipping dimensions:
    26.1x18.5x2.0cm
  • Tariff Code:
    8538900000
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications

Features:

  • High-Performance 32-Bit Microprocessor Architecture With Flash And SRAM Memory
  • Seven Serial Ports And Ethernet Compatibility For Versatile Communication
  • Compact 6U Eurocard Form Factor With Low Power Consumption And Self-Diagnostics
The GE WESDAC D20 ME II CPU Board is designed to deliver superior processing power for D20 and D200 systems, featuring a 32-bit microprocessor with 2 MB flash application memory, 1.5 MB SRAM, 512 KB NVRAM, and 1 MB BootROM. Its TCXO clock provides 1.0 ms resolution with ±2 ppm accuracy, ensuring precise synchronization for demanding automation tasks. This board supports a wide power range including 20–60 VDC, 100–300 VDC, or 85–264 VAC, consuming only 2.5 W typically and up to 5 W at maximum.

Equipped with seven RS-232/485 serial ports, two D20 Link HDLC ports, and a dedicated RS-232 maintenance port, the GE WESDAC D20 ME II CPU Board allows aggregate serial data rates of up to 500 kbps. It also supports Ethernet PPP/TCP/IP networking, making it ready for modern substation applications. The board is compatible with both VME and non-VME systems and supports media types including 10 Base-T, 10 Base-2, and 10 Base-FL, providing flexible connectivity.

Integration and maintenance are simplified with the GE WESDAC D20 ME II CPU Board thanks to flash-based application memory that removes the need for EPROM programming. It fully supports existing D20 application firmware and configurations, reducing the number of processor boards needed in complex systems. The built-in self-diagnostics, including RAM tests, configuration checks, I/O module health monitoring, and error logging, ensure reliable and uninterrupted operation in industrial environments.

The WESDAC D20 ME II GE CPU Board may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).

GE WESDAC D20 ME II CPU Board Manuals, Datasheets, Drivers, Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
GE WESDAC D20 ME II CPU Board Specs

General

  • Manufacturer GE
  • Model WESDAC D20 ME II
  • Condition New Original ready stock
  • Product Family D20ME,D200ME II,D200ME
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Description
The GE WESDAC D20 ME II CPU Board represents the next generation in the proven D20 series, providing a powerful 32-bit microprocessor architecture with 2 MB flash application memory, 1.5 MB SRAM, 512 KB NVRAM, and 1 MB BootROM. Its TCXO clock delivers 1.0 ms resolution with ±2 ppm accuracy, ensuring precise timing across complex automation applications. This high-performance design provides up to two-and-a-half times the speed of the D20 M++ processor, significantly increasing I/O processing capabilities and communication port throughput.

Equipped with seven RS-232/485 serial ports and two D20 Link HDLC ports, the GE WESDAC D20 ME II CPU Board allows for aggregate serial data rates up to 500 kbps. The processor also features a dedicated RS-232 maintenance port and supports Ethernet connectivity with PPP/TCP/IP for seamless integration into modern substation networks. Both VME and non-VME versions are available, offering flexible deployment options.

The GE WESDAC D20 ME II CPU Board simplifies system management with flash-based application memory, eliminating the need to program EPROMs. It is fully compatible with existing D20 application firmware and configurations, allowing easy upgrades for existing systems. The processor reduces the number of boards required in complex systems while maintaining a large library of protocol and substation automation applications.

Designed with reliability in mind, the GE WESDAC D20 ME II CPU Board includes self-diagnostic features such as program memory checksum, RAM tests, configuration verification, interrupt controller verification, serial port tests, watchdog and power monitoring, I/O module health checks, and error logging. Its 5 VDC power requirement consumes 2.5 W typically and 5 W at maximum, while supporting a wide input voltage range of 20–60 VDC, 100–300 VDC, or 85–264 VAC.

Physically, the GE WESDAC D20 ME II CPU Board conforms to the standard 6U Eurocard height (10.5", 266.7 mm) and 4HP front panel width (0.8", 19.8 mm), making it easy to integrate into existing D20 and D200 control racks. The processor's media support includes 10 Base-T, 10 Base-2, and 10 Base-FL, providing flexible networking options for industrial automation environments.
Alternative Names
D20ME II D20EME D20MX D200MX D20A
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What is the memory configuration of the GE WESDAC D20 ME II CPU Board?
It features 2 MB flash application memory, 1.5 MB SRAM, 512 KB NVRAM, 1 MB BootROM, and optional 0, 8, or 16 MB battery-backed SRAM.
How many serial communication ports does the GE WESDAC D20 ME II CPU Board support?
The GE WESDAC D20 ME II CPU Board has seven RS-232/485 serial ports plus a dedicated RS-232 maintenance port.
Why does the GE WESDAC D20 ME II CPU Board use a TCXO clock?
The TCXO clock provides 1.0 ms resolution and ±2 ppm accuracy, ensuring precise timing for I/O and network communication.
Is the GE WESDAC D20 ME II CPU Board brand new?
Yes, all units of the GE WESDAC D20 ME II CPU Board are shipped as brand-new, fully tested products.