Description
Technical Specifications
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Board Type: Tachometer and Bus Interface PCB with conformal coating.
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Tachometer Input: 1 channel for DC analog tachometer signals, configurable for ±50V, ±100V, or ±200V ranges.
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Tachometer Output: Conditioned speed feedback signal to regulator board.
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Bus Interface: RS-232 or RS-422 serial communication for external system integration.
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Protocol Support: GE proprietary protocol.
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Signal Conditioning: Precision scaling, filtering, and offset adjustment for tachometer signals.
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Communication: Backplane interface to regulator board via 96-pin DIN connector.
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Status Indicators: 8 LEDs for power, tachometer signal presence, bus activity, and fault conditions.
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Form Factor: Standard 6U height, 220mm depth, GE 19″ rack compatible.
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Temperature Range: 0°C to +60°C operational.
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Isolation: 1500V RMS between field and logic circuits.
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Power: 5 VDC and ±15 VDC from backplane.
Advantages & Key Features
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Analog Tachometer Processing: The GE Fanuc F31X136TBGAAG1 provides precision processing of DC analog tachometer signals for accurate speed feedback in applications without digital encoders.
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Configurable Input Ranges: Supports multiple tachometer voltage ranges, providing flexibility for different tachometer types and speeds.
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Integrated Bus Interface: Combines tachometer processing with bus communication in a single board, enabling remote monitoring and setpoint adjustment.
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Precision Signal Conditioning: Onboard scaling, filtering, and offset adjustment on the GE Fanuc F31X136TBGAAG1 ensure accurate speed feedback.
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Diagnostic LEDs: 8-LED indicator matrix provides real-time status for troubleshooting.
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Conformal Coating: Protects against dust, moisture, and chemicals.
Application Fields
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Steel & Metal Processing: Rolling mill auxiliary drives utilizing analog tachometer feedback.
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Paper & Pulp: Paper machine sections with analog tachometer speed feedback.
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Material Handling: Crane and conveyor systems using analog speed feedback.
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General Industrial: Any GE DC300/DC200 drive requiring analog tachometer feedback.
Comparison with Alternatives
| Feature | GE Fanuc F31X136TBGAAG1 | Generic Aftermarket Clone | Separate Tachometer + Comm Board |
|---|---|---|---|
| Tachometer Processing | Yes | Varies | Requires separate board |
| Bus Communication | Yes | Varies | Requires separate board |
| Integration | Direct backplane | Direct (if cloned) | Requires external wiring |
| Diagnostics | 8 LEDs | Limited | Varies |
| Cost | High | Moderate | High |
Key Differentiator: The GE Fanuc F31X136TBGAAG1 integrates both tachometer processing and bus communication functions onto a single backplane-connected board, making it an efficient solution for systems requiring analog speed feedback and remote communication.
Selection Suggestions & Precautions
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Tachometer Type: Confirm your tachometer’s voltage range matches the configuration options of the GE Fanuc F31X136TBGAAG1 (±50V, ±100V, or ±200V).
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Tachometer Wiring: Use shielded twisted-pair cables for tachometer connections to ensure signal integrity.
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Calibration: Verify scaling and offset calibration for accurate speed feedback.
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Bus Communication: Confirm that your external system supports the same serial interface and protocol.
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Capacitor Aging: NOS boards stored >5 years may require capacitor inspection.
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Test Report Required: Request verification of tachometer accuracy and communication functionality.
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Spare Strategy: For critical systems, maintain a tested spare.
Final Recommendation
The GE Fanuc F31X136TBGAAG1 is a specialized tachometer and bus interface board for GE DC300/DC200 drive systems utilizing analog tachometer feedback for speed control. Its integrated design combines tachometer processing with bus communication in a single module, making it a practical solution for systems requiring both functions. Prioritize suppliers with testing capabilities for tachometer accuracy verification. For critical applications, maintain a tested spare of the GE Fanuc F31X136TBGAAG1 to minimize downtime. As GE has discontinued this series, sourcing through reputable aftermarket suppliers with refurbishment and testing capabilities is recommended.

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