GE WESTERM D20C Termination Module (D20 Combination Module)

Description

Technical Specifications

• Manufacturer: GE Vernova (Grid Solutions)
• Model: WESTERM D20C
• Module Type: Field Wiring Termination (D20 Combination Module lower unit)
• Form Factor: 19-inch rack-mountable, 1U height (5.25” × 19” × 2.5” depth)
• Digital Inputs: 16 channels (12–130 VDC, sink/source selectable)GE Vernova
• Digital Outputs: 8 relay outputs (momentary or dual-function trip/close; 3 A max per channel)GE Vernova
• Analog I/O (Optional):
  • 16 Analog Inputs: Bipolar differential, ±35 VDC, 14-bit resolution, ±0.05% accuracyGE Vernova
  • 8 Analog Inputs + 8 Analog Outputs: 0–20 mA, 12-bit resolutionGE Vernova
• Wiring Termination: Compression disconnect terminals (accepts #12 AWG max wire) or DB25 connectorsGE Vernova
• Power Supply: 20–60 VDC, 5 W typical / 11 W full load
• Operating Temperature: -40°C to +70°C (-40°F to 158°F)
• Storage Temperature: -40°C to +85°C (-40°F to 185°F)
• Humidity: 5%–95% RH (non-condensing)
• Shock/Vibration: IEC 60255 compliant (substation-hardened)
• Isolation: Galvanic isolation between field I/O and controller (2500 Vrms)
• Dimensions: 483 mm (19”) × 133 mm (5.25”) × 63 mm (2.5”)
• Weight: 1.0 kg (2.2 lbs)
• Certifications: CE, UL 508, CSA C22.2, IEC 61010-1
• Status: Active (widely deployed; supported by GE Vernova)

Key Features

1. Detachable Modular Design: The WESTERM D20C separates from the WESDAC D20C control module, allowing field wiring to be terminated and tested offline before mating with the controller, reducing installation downtimeGE Vernova.
2. Comprehensive I/O Termination: Supports up to 16 digital inputs, 8 control outputs, and optional 16 analog inputs or 8 analog I/O pairs, accommodating diverse field sensor and actuator connectionsGE Vernova.
3. Substation-Hardened Construction: Built to withstand extreme temperatures, humidity, shock, and vibration, ensuring reliable operation in high-voltage substations, power plants, and industrial facilitiesGE Vernova.
4. Galvanic Isolation: All I/O channels feature 2500 Vrms galvanic isolation, protecting the controller from ground loops, voltage spikes, and electrical noise in harsh industrial environmentsGE Vernova.
5. Flexible Wiring Options: Choose between compression disconnect terminals (for direct field wiring) or DB25 connectors (for pre-fabricated cables), adapting to different installation preferencesGE Vernova.
6. Dual-Function Control Outputs: 8 relay outputs support momentary or trip/close dual-function operation, ideal for controlling circuit breakers, switches, and other power system devicesGE Vernova.
7. High-Accuracy Analog Processing: Optional analog inputs deliver ±0.05% voltage accuracy and 14-bit resolution, ensuring precise monitoring of voltage, current, temperature, and other process variablesGE Vernova.
8. Hot-Swappable Compatibility: Works with hot-swappable WESDAC D20C modules, enabling maintenance or replacement of the control unit without disconnecting field wiring or shutting down the systemGE Vernova.
9. Simplified Maintenance: Front-panel diagnostic LEDs indicate power, communication, and I/O status, allowing quick troubleshooting; detachable design eases module removal and replacementGE Vernova.
10. Seamless System Integration: Fully compatible with GE D20/D200 substation controllers, supporting DNP3 and GE proprietary D.20 Link protocols for communication with SCADA master stations and other intelligent electronic devices (IEDs)GE Vernova.

Applications

• Substation Automation: Primary termination interface for monitoring and controlling transformers, circuit breakers, switches, and other substation equipment in high-voltage power gridsGE Vernova.
• Power Generation: Field wiring hub for data acquisition and control in thermal, hydro, and renewable power plants, connecting sensors for voltage, current, frequency, and temperature monitoringGE Vernova.
• Industrial Control Systems: I/O termination for manufacturing, chemical, oil and gas, and water/wastewater facilities, linking PLCs, sensors, and actuators in distributed control systems (DCS)GE Vernova.
• SCADA & Remote Monitoring: Critical link between field devices and SCADA master stations, enabling real-time data collection, control, and reporting for remote industrial and power infrastructureGE Vernova.
• Legacy System Upgrades: Replacement or expansion termination module for aging GE D20-based systems, preserving existing field wiring investments while updating control hardwareGE Vernova.

System Compatibility

• Controller Compatibility: GE WESDAC D20C, D20, D200 Substation ControllersGE Vernova
• Communication Protocols: DNP3 (serial/Ethernet), GE D.20 Link (proprietary), Modbus RTU/TCPGE Vernova
• Chassis: 19-inch standard rack-mount chassis (1U height)
• Software: Configured via GE Vernova’s D20 Configuration Software, supporting IEC 61131-3 programming standardsGE Vernova