GE UR6PH
GE UR6PH
GE UR6PH
GE UR6PH
GE UR6PH

GE UR7CH | Multilin UR Fiber Communication Module – Field Notes

  • Model: UR7CH
  • Alt. P/N: UR-7CH
  • Product Series: GE Multilin UR Platform
  • Hardware Type: Dual-port fiber-optic communication module
  • Key Feature: 2×1300nm single-mode laser ports, long-distance fiber links
  • Primary Field Use: Connects UR relays over fiber for peer-to-peer protection and SCADA
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Part number: UR7CH
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Description

Hard-Numbers: Technical Specifications

  • Fiber Ports: 2 × SC/ST, 1300nm single-mode laser
  • Fiber Distance: Up to 10 km (9/125μm single-mode)
  • Protocols: IEC 61850 (GOOSE/MMS), DNP3, Modbus TCP/IP
  • Data Rate: 100 Mbps fiber, 2 Gbps backplane throughput
  • Isolation Rating: 2500Vrms field-to-backplane galvanic isolation
  • Operating Temperature: -40°C to +70°C continuous
  • Power Draw: 4.2W max, backplane powered
  • Form Factor: Standard UR slot, hot-swap capable
  • Redundancy: Supports PRP/HSR for redundant fiber rings
GE UR6PH

GE UR6PH

The Real-World Problem It Solves

Long-distance substation links suffer from EMI, ground loops, and copper cable limits. External fiber converters add cost, points of failure, and cabinet space.

Where you’ll typically find it:

  • Large transmission substations with relay bays >2 km apart
  • Mountainous or remote substations needing long fiber runs
  • Industrial plants (refineries, power plants) with heavy EMI environments

Bottom line: It integrates dual fiber ports directly into the UR rack, eliminating external converters and extending link distance.

 

Hardware Architecture & Under-the-Hood Logic

has a dedicated 32-bit comms processor, independent of the main relay CPU. All fiber circuits are galvanically isolated from the backplane.

  1. 1300nm laser transmitters convert electrical signals to light.
  2. Fiber receivers convert light back to electrical data; PHY chips handle encoding/decoding.
  3. Onboard processor filters and prioritizes GOOSE, MMS, and DNP3 messages.
  4. High-speed backplane interface exchanges data with the local UR relay CPU.
  5. Redundancy logic auto-switches ports if a fiber or laser fails.

 

Field Service Pitfalls: What Rookies Get Wrong

Using Multi-Mode FiberNew techs plug 62.5/125μm multi-mode fiber into . Link fails or has high error rates; laser damage over time.

  • Field Rule: Only use 9/125μm single-mode fiber; 1300nm lasers won’t work with multi-mode.

Dirty Fiber ConnectorsTechs mate un cleaned SC/ST connectors. Dust causes 50–90% signal loss; random link drops under load.

  • Quick Fix: Clean connectors with isopropyl alcohol and lint-free wipes before mating; inspect with a fiber scope.

Ignoring Laser SafetyRookies look directly into fiber ports when powered. 1300nm infrared laser causes permanent eye damage (invisible light).

  • Field Rule: Never stare into active fiber ports; power off module before handling connectors.
GE UR6PH

GE UR6PH

Commercial Availability & Pricing Note

Please note: The listed price is for reference only and is not binding. Final pricing and terms are subject to negotiation based on current market conditions and availability.

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