BL20-400 WOODWARD industrial power supply module

• Brand
  Woodward
• Model
  BL20-400
• Product Name
  ProTech-GII Overspeed Protection Module
• Dimensions
  145 mm x 110 mm x 40 mm
• Original
  United States
• Customs HS
  85371090
• Weight
  1.0 kg
• Operating Temperature
  -40°C to +85°C
• Storage Temperature
  -55°C to +90°C
• Warranty
  12 month
• Product Status
  New and original

Woodward BL20-400 ProTech-GII Overspeed Protection Device Product Introduction

Input

Input Channels: 3 independent speed sensing channels

Sensor Compatibility: Magnetic Pickup (MPU) or Eddy Current Proximity Probes

Frequency Range: 0–20 kHz (wide RPM coverage)

Input Isolation: 2500 VDC channel-to-channel isolation

Signal Threshold: Programmable trigger levels for overspeed detection

Response Time: <12 milliseconds total system trip response

Output

Trip Outputs: 3 configurable relay outputs (2 normally open, 1 normally closed)

Alarm Outputs: 2 dedicated alarm relays for fault indication

Contact Rating: 5A @ 250 VAC / 30 VDC (resistive load)

Communication: Modbus TCP/UDP and Modbus RTU for diagnostics and configuration

Power Requirements

Dual Redundant Power Inputs

High Voltage: 88–264 VAC / 90–150 VDC

Low Voltage: 18–32 VDC

Power Consumption: ≤15 W

Core Functions

1.Continuously monitors shaft speed via three independent sensor channels.

2.Executes 2oo3 voting logic to validate overspeed conditions and prevent false trips.

3.Initiates immediate safety shutdown via redundant relay outputs when overspeed is detected.

4.Provides real-time speed measurement, trend logging, and sequence-of-events (SOE) recording.

5.Supports remote configuration, calibration, and diagnostics via Modbus communication.

6.Delivers fail-safe operation with automatic fault detection and de-energize-to-trip design.

Key Features

1.TMR Architecture: Three independent processing channels ensure fault tolerance.

2.Programmable Parameters: Configurable speed thresholds, trip delays, and sensor sensitivity.

3.LED Indication: Front-panel LEDs for power, status, channel health, and trip/alarm conditions.

4.EMC Compliance: Meets IEC 61000-4 standards for industrial electromagnetic compatibility.

5.Shock & Vibration Resistance: Withstands 6 G vibration (40–2000 Hz) and 20 G shock.

6.Industry Approvals: SIL 3, ATEX, FM, CE, and cUL certifications.

7.MTBF > 3,000,000 Hours: Exceptional reliability for long-term critical operation.

Application Cases

1.Gas Turbines: Protects power generation and mechanical drive turbines from overspeed during load rejection.

2.Steam Turbines: Ensures safe shutdown in utility and industrial steam turbine systems.

3.Compressors: Monitors centrifugal and axial compressor speeds in oil & gas pipelines.

4.Generators: Prevents overspeed in diesel and gas generator sets during grid loss.

5.Oil & Gas Refineries: Integrates with safety instrumented systems (SIS) for turbine and compressor protection.

6.Power Plants: Deployed in combined-cycle power plants for turbine overspeed safety.

7.Marine Propulsion: Safeguards marine gas turbines and diesel engines on vessels and offshore rigs.

8.Industrial Manufacturing: Protects turbines in chemical, pulp & paper, and metal processing facilities.

Key Advantages

1.SIL 3 Certification: Complies with IEC 61508 SIL 3 for highest safety integrity in critical applications.

2.2oo3 Voting Logic: Triple modular redundant (TMR) architecture with 2-out-of-3 voting eliminates single-point failures.

3.Ultra-Fast Response: Trip response under 12 ms protects machinery from overspeed damage.

4.Universal Sensor Compatibility: Supports both MPU and eddy current probes for flexible installation.

5.Hot-Swappable Design: Allows replacement without system shutdown, minimizing downtime.

6.Advanced Diagnostics: Continuous self-testing and real-time fault monitoring for predictive maintenance.

7.Harsh Environment Rating: Operates reliably in extreme temperatures, vibration, and EMI conditions.

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