Description
Product Introduction & Engineering Value
Field wiring mistakes are one of the most common causes of delayed RTU commissioning. The GE D20C Termination module simplifies installation by providing a dedicated termination interface between field devices and the WESDAC D20C processing module.
Designed for the GE Multilin D20 substation automation platform, the termination module supports flexible wiring methods while maintaining reliable signal routing for digital status inputs, control outputs, and optional analog channels. It is widely deployed in electric utility substations and SCADA systems.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | GE Grid Solutions |
| Product Family | Multilin D20 |
| Module Type | D20C Field Termination Module |
| Compatible Processor | WESDAC D20C |
| Digital Inputs | 16 |
| Control Outputs | 8 |
| Optional Analog Channels | 16 AI or 8 AI / 8 AO (daughter card dependent) |
| Termination Options | Compression, DB25, Compression Disconnect, Barrier (model dependent) |
| Field Wiring | Direct terminal block or DB25 interface |
| Typical Installation | RTU Cabinets and Substation Control Panels |
| Primary Application | SCADA and Substation Automation Systems |
Field Application & The “Trench” Experience
A utility company scheduled the replacement of an aging RTU during a planned substation outage. Rather than rewiring hundreds of field conductors, engineers retained the existing cabinet layout and replaced the damaged D20C termination assembly with an identical version. After verifying every digital input and breaker control circuit, the WESDAC D20C processor recognized all field points without requiring major wiring modifications. The substation returned to service several hours ahead of schedule.
Typical applications include:
- Transmission Substation Breaker Status Monitoring
- Distribution Feeder Remote Terminal Units (RTUs)
- Generator Switchyard SCADA Control Cabinets
D20C Termination
D20C Termination
Transparency SOP: QA & Testing
Every Termination module is inspected before shipment using a documented quality procedure.
- Verify the complete catalog number and termination type.
- Inspect terminal blocks, DB25 connectors, and PCB traces for damage.
- Check connector alignment between the WESTERM termination board and the WESDAC processing module.
- Verify continuity across field termination points.
- Inspect for corrosion, overheating, or repaired circuitry.
- Package the module in anti-static materials with protective cushioning for transportation.
The Veteran’s Tech Trap Guide
⚠️ Don’t Assume Every Termination Board Is Identical
GE produced multiple termination variants, including Compression, DB25, Barrier, and Compression Disconnect versions. Confirm the exact termination style before ordering.
⚠️ Match the Termination Module to the WESDAC Configuration
Some installations include analog daughter boards, while others provide only digital I/O. Verify the required analog configuration before replacing the termination assembly.
PRO TIP: Label every field cable before removing the original module. Although many terminals appear identical, incorrect field wiring can result in false breaker indications or failed control commands during commissioning.
Dynamic FAQ
Q1. What is the purpose of the GE Termination module?
It provides the physical interface between field wiring and the WESDAC I/O processor, allowing digital and optional analog signals to be connected safely and efficiently.
Q2. Is the Termination module compatible with every D20 system?
It is designed specifically for compatible GE Multilin /WESDAC configurations. Compatibility should be confirmed using the complete catalog number and hardware revision.
Q3. Which field termination styles are available?
Depending on the catalog number, available options include Compression, DB25, Barrier, and Compression Disconnect terminations.
Q4. Can the module support analog inputs and outputs?
Yes. When used with the appropriate daughter board, the system supports either 16 analog inputs or 8 analog inputs plus 8 analog outputs.
Q5. How are New Surplus and Refurbished modules tested?
Each unit undergoes model verification, connector inspection, terminal continuity testing, visual PCB examination, and functional compatibility checks before shipment.
Q6. Is warranty coverage available?
Yes. Warranty is available for both New Surplus and professionally refurbished inventory. Coverage terms depend on product condition and can be provided with your quotation.
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