GE WESDAC D20ME 18-MAR-13 Redundant main controller

Specific Parameters

Electrical Parameters
Supply Voltage: 24V DC ±10%, supporting dual-channel redundant power supply
Processor: Dual Intel 80486DX2 processors, 66MHz clock speed
Memory Configuration: 16MB SRAM (working memory), 8MB Flash (program storage)
Communication Interfaces: 2×RS485 (D.20 Link, 1Mbps), 1×RS232 (maintenance port), 1×Ethernet (10BASE-T, Modbus TCP)
Redundancy Functions: Controller redundancy, power redundancy, communication link redundancy, switching time ≤5ms
Isolation Level: 2.5kV AC between power and signal (1 minute), 2kV AC between communication port and system (1 minute)
Protection Functions: Overvoltage protection, short circuit protection, reverse polarity protection, overheating protection (alarm triggered at 70°C)
Power Consumption: ≤25W under normal operation, ≤45W in redundant mode
Environmental Parameters
Operating Temperature: -40°C to 70°C
Storage Temperature: -40°C to 85°C
Relative Humidity: 5% to 95% (non-condensing, no dew formation)
EMC Immunity: Compliant with EN 61326-1 industrial grade standard, common mode rejection ratio ≥120dB
Vibration Resistance: 10-500Hz, 10g acceleration (compliant with IEC 60068-2-6)
Shock Resistance: 30g acceleration, 11ms duration (compliant with IEC 60068-2-27)
Mechanical Parameters
Dimensions: 160mm (W) × 130mm (H) × 250mm (D)
Weight: Approximately 2.2kg
Mounting Method: D20 series standard rack mounting (compatible with 19-inch cabinets)
Protection Class: IP20 (module itself)
Housing Material: Galvanized steel sheet (powder-coated surface)
Terminal Type: Phoenix terminals (power/communication), backplane bus connector (I/O interaction)

Product Performance

D20ME 18-MAR-13 adopts a dual-CPU hot-standby redundant architecture, with data synchronization delay between active and standby controllers ≤1ms, enabling non-disturbance switching in case of failure to ensure continuous operation of control logic. It supports parallel processing of more than 1000 control loops, with logic operation cycle ≤10ms. Integrated with D.20 Link high-speed communication protocol, the data interaction response time with I/O modules is ≤20ms. The Ethernet port supports Modbus TCP for connection with third-party systems, with data transmission rate ≥10Mbps.

Built-in comprehensive self-diagnostic system, it real-time monitors processor status, memory integrity, communication links and power voltage, with fault diagnosis coverage ≥99%. Fault information is synchronously fed back through LCD display and status indicators, supporting 512 time-stamped event records. Adopting industrial-grade anti-interference circuit design, it can maintain signal stability in strong electromagnetic environments, adapting to dusty and high-humidity industrial sites.

Fully compatible with GE D20 series I/O modules (such as EME, MIC), supporting online configuration programming and firmware upgrade via ToolboxST software, enabling system maintenance without shutdown. The mean time between failures (MTBF) is ≥350,000 hours, meeting the industrial requirements of long-term continuous operation.

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