GE D20MIC10BASE-T (P/N 820-0756) – 10BASE‑T Ethernet Interface for GE D20 RTU

The GE D20MIC10BASE-T (820-0756) is a 10BASE‑T Ethernet communication module designed for the GE D20 substation RTU platform. It brings the D20 onto a plant or utility LAN using standard twisted‑pair Ethernet, which in many cases is the simplest way to add IP networking to an existing D20 rack without reworking I/O or field wiring. From my experience, it’s a straightforward drop‑in for engineers maintaining legacy D20 fleets who need stable TCP/IP connectivity for SCADA, maintenance access, and remote diagnostics.

Our Order Process & Guarantees

• Warranty: 365 days
• Lead time: 1 week if in stock; no more than 1 month at the latest
• Payment: 50% advance payment; full payment prior to delivery
• Express options: FedEx, UPS, DHL
• Pre‑ship checks: Visual inspection, basic power‑on where applicable, and anti‑static packing are standard.

Key Features

• 10BASE‑T Ethernet (RJ45) – Provides 10 Mbps twisted‑pair connectivity for the D20 RTU; ideal for legacy substation LANs.
• Backplane‑powered – No external power supply; the card draws from the D20 chassis for a clean, simple install.
• Protocol enablement via D20 firmware – Typically supports DNP3 over TCP/UDP and Modbus TCP when enabled in the D20 configuration environment.
• Status LEDs – Front‑panel indicators for link/activity make first‑line diagnostics quicker in the field.
• Drop‑in for existing D20 racks – Fits the standard D20 chassis slot; you keep your I/O and wiring intact.
• Designed for utility environments – Built for substations and industrial cabinets where noise and temperature swings are common.

Technical Specifications

Application Fields

Utilities and industrial operators use the D20MIC10BASE-T to put legacy D20 systems on IP networks without swapping I/O hardware. You might notice that it’s especially common in:

• Transmission and distribution substations (SCADA integration and remote engineering access)
• Generation sites (hydro, gas, and CHP) consolidating RTU data on plant Ethernet
• Oil & gas pipelines and terminals using DNP3/Modbus TCP for control centers
• Industrial substations and process plants modernizing legacy serial networks

Advantages & Value

• Keep your installed base – Extend D20 service life with Ethernet rather than re‑platforming.
• Compatibility – Designed for the D20 backplane and D20 firmware toolchain; no messy adapters.
• Lower project risk – Minimal cabinet changes and limited outage time, which typically means faster approvals.
• Predictable maintenance – Front‑panel LEDs and standard RJ45 make field checks quick.
• Support, not just supply – We can help align firmware/protocol options so it behaves as your SCADA expects.

Installation & Maintenance

• Cabinet & environment – Mount within a GE D20 chassis inside a clean, ventilated control cabinet. Provide stable grounding and keep Ethernet cabling away from high‑noise conductors.
• Wiring – Use quality Cat5e (or better) twisted pair for 10BASE‑T runs; verify shield and drain practices per site EMC rules.
• Safety – De‑energize the D20 rack before inserting/removing the card. Use ESD protection and secure the card with the front hardware.
• Configuration – Set IP/network parameters in the D20 configuration environment. Protocols such as DNP3 TCP or Modbus TCP are typically enabled/licensed at the firmware level.
• Routine care – Periodically inspect connectors, clean dust with dry air, check LED status, and keep firmware at an approved revision after site FAT/SAT.

Quality & Certifications

GE D20 hardware families are commonly deployed in IEC/IEEE utility environments and are produced under ISO 9001 quality systems. Units are typically CE compliant for EMC/Low Voltage, and many installations require UL/cUL labeling; specific markings can vary by build revision, so we confirm label photos before shipment when needed. RoHS status tends to be revision‑dependent for legacy modules.

Warranty from us is 365 days. If you need a test report or pictures of the actual part number label (820-0756) for your records, we can provide them prior to dispatch.

Related & Supporting Components

• D20 CPU/Controller modules (e.g., D20ME) for application processing
• D20 I/O boards (digital/analog) for field signal termination
• D20 power supply modules sized for your chassis population
• Additional comms options (serial interface cards) if you need mixed Ethernet/serial topologies