Description
Product Overview
- Brand: Bently Nevada
- Model: 133388-01
- Series: 3500
- Module Type: Overspeed Detection Module
- This module protects machines from overspeed events.
- It works inside Bently Nevada 3500 monitoring racks.
- The design supports critical rotating equipment.
Main Product Benefits
- Fast overspeed response for machine safety.
- Wide sensor compatibility for flexible design.
- Clear LED status for easy operation checks.
- Stable signal handling in noisy plants.
Input Signal Characteristics
- Input Signal Range: +10.0 V to −24.0 V
- Input Protection: Internal signal limiting
- Input Impedance: 20 kΩ
- Supported Sensors: Proximity probes and magnetic pickups
- Typical Sensors: 3300 and 7200 series transducers
- Power Consumption: About 8 W typical
Output and Indication Functions
- OK LED: Confirms normal module operation
- TX/RX LED: Shows rack communication activity
- Bypass LED: Indicates bypass condition
- Test Mode LED: Shows test operation status
- Alarm LEDs: Display relay alarm states
Signal Outputs
- Buffered Outputs: One coaxial connector per channel
- Output Protection: Short circuit and ESD protected
- Output Impedance: 550 Ω
- Transducer Supply: −24 Vdc, up to 40 mA
Recorder and Measurement Data
- Recorder Output: 4 to 20 mA
- Output Scaling: Proportional to full speed range
- Load Resistance: 0 to 600 Ω
- Voltage Compliance: 0 to +12 Vdc
- Resolution: 0.3662 µA per bit
- Update Rate: About 100 ms
- Accuracy Drift: Low across temperature range
Additional Technical Highlights
- Supports single-channel overspeed logic.
- Designed for turbine and compressor protection.
- Stable performance under continuous operation.
- Compatible with standard 3500 rack power supplies.
Typical Applications
- Steam turbine overspeed protection
- Gas turbine safety systems
- High-speed compressor monitoring
- Critical rotating machinery shutdown
Professional FAQ
- Is this module used only for protection?
- No. It also provides speed data for monitoring.
- Can magnetic pickups be used directly?
- Yes. The input supports magnetic pickup signals.
- Does recorder wiring affect protection?
- No. Short circuits do not change module operation.
- What should be checked before replacement?
- Confirm rack slot, sensor type, and speed range.
- Buying advice for new projects?
- Match overspeed limits to machine design speed.
Packaging, Warranty and Shipping
- Delivered in secure industrial packaging.
- Warranty: 12 months.
- Worldwide shipping via FedEx, UPS, or DHL.
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