Product Details
The GE D20 MIC 10BASE-T 820-0756, also cataloged as the 820-0756 Ethernet Interface Module, operates as a dedicated hardware component for LAN media conversion and 10 Mbps Ethernet signal conditioning within GE D20 Substation Automation platforms.
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | 820-0756 |
| Brand | GE |
| Origin | USA |
| Platform | D20 Substation Automation Systems |
| Module Type | Media Interface Controller (MIC) |
| Port Type | 10BASE-T Ethernet (RJ45 / AUI media conversion) |
| Physical Media | Category 3/5 Unshielded Twisted Pair (UTP) |
| Data Transfer Rate | 10 Mbps (half-duplex / full-duplex execution) |
| Dimensions | Standard D20 rack card profile |
| Weight | 0.4 kg |
| Operating Temp | -20 to +70 deg C |
| Power Consumption | 2.5 W (typical, backplane powered) |
Backplane Bus Communication & I/O Density Scaling
The interface card routes 10BASE-T network frames into the internal D20 backplane architecture, supporting deterministic protocol translation and sequence-of-events reporting. Internal logic buffering regulates network packet queues to prevent frame collision backpressure from delaying local SCADA task execution. The onboard transceiver isolates logic ground loops while maintaining continuous signal integrity across expanded substation network topologies.
Frequently Asked Questions
Q: What network medium does the 820-0756 module interface with?
A: The module provides direct physical conversion to 10BASE-T twisted-pair Ethernet media over an standard RJ45 copper interface at 10 Mbps transmission speeds.
Q: How is operating power delivered to the media controller board?
A: Operational logic power is drawn directly from the internal D20 chassis backplane bus, requiring no external auxiliary power wiring.
Q: How are channel signal lines protected against station ground potential rise?
A: Channel-to-bus galvanic isolation transformers isolate field network cabling from the core processor backplane to prevent ground potential interference.
Field Installation Guidelines
- Power down the host D20 chassis or verify hot-swap rack procedure compliance before sliding the card into its designated slot.
- Align the module card edges with the internal card guides and push firmly until the rear connector seats into the backplane socket.
- Tighten the front panel retaining screws to a torque specification of 0.6 Nm to ensure mechanical retention and frame grounding.
- Plug the CAT3/CAT5 STP or UTP network cable into the RJ45 port until the retention tab locks securely.
- Ensure Ethernet signal cables are dressed away from high-voltage DC control circuits and switching transformer lines.
Additional Information
- 100% Genuine Parts: All products are original and authentic, ensuring reliable industrial performance.
- 30-Day Refund Guarantee: Return any in-stock item within 30 days in original, unopened packaging for a full refund (excluding shipping and fees).
- 12-Month Warranty: Covers defects in materials or workmanship; excludes misuse, normal wear, or unauthorized modifications.
- Worldwide Shipping: We ship via USPS, UPS, FedEx, and DHL. Delivery times vary by country and may be subject to customs or import fees.
- Support & Contact: Technical and warranty assistance is available anytime. Contact us here: Contact.
- Purchase Guidance: Check product specifications and compatibility carefully before ordering to ensure proper application.
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