BENTLY 128229-01 Four channel Monitoring Module – Highly Integrated, Multi functional Measurement!

The Bently Nevada 128229-01 is a high-precision 4–20mA Vibration Transmitter module designed for continuous machinery health monitoring in critical industrial assets. Part of Bently Nevada’s 3300 XL series, this device converts raw accelerometer or velocity sensor signals into industry-standard analog outputs for integration with DCS, PLC, or SCADA systems. The 128229-01 provides real-time measurement of casing vibration (velocity or acceleration) with ±1% accuracy, enabling predictive maintenance for rotating equipment like turbines, compressors, and pumps. Its rugged design features galvanic isolation, EMI shielding, and DIN-rail mounting, ensuring reliable operation in electrically noisy environments such as power plants and refineries.

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Description

The Bently Nevada 128229-01 is a high-precision 4–20mA Vibration Transmitter module designed for continuous machinery health monitoring in critical industrial assets. Part of Bently Nevada’s 3300 XL series, this device converts raw accelerometer or velocity sensor signals into industry-standard analog outputs for integration with DCS, PLC, or SCADA systems. The 128229-01 provides real-time measurement of casing vibration (velocity or acceleration) with ±1% accuracy, enabling predictive maintenance for rotating equipment like turbines, compressors, and pumps. Its rugged design features galvanic isolation, EMI shielding, and DIN-rail mounting, ensuring reliable operation in electrically noisy environments such as power plants and refineries.

Engineered for SIL 2 compliance (IEC 61508), the module offers configurable alarm thresholds and failsafe modes to trigger shutdowns during dangerous vibration levels. The Bently Nevada 128229-01 supports dual-sensor inputs with automatic signal validation, detecting sensor faults or cable breaks to prevent false alarms. With its loop-powered design and hazardous area certifications, it simplifies retrofits in ATEX/IECEx Zone 2 locations while minimizing wiring complexity.

BENTLY 128229-01

BENTLY 128229-01

Technical Specifications

Parameter Name Parameter Value
Product Model 128229-01
Manufacturer Bently Nevada (Baker Hughes)
Product Type Vibration Transmitter
Input Signal 2x IEPE Accelerometers / Velocity Sensors
Output Signal 2x 4–20mA (Isolated)
Measurement Range Velocity: 0–10 mm/s RMS / Accel: 0–20 g RMS
Frequency Response 10 Hz–1 kHz (±3 dB)
Accuracy ±1% of Full Scale
Loop Resistance ≤600 Ω (24V DC)
Power Supply 15–30V DC (Loop-Powered)
Isolation 500V AC (Channel-to-Channel/Power)
Operating Temperature –40°C to +85°C (–40°F to +185°F)
Hazardous Certifications ATEX/IECEx Zone 2, UL/cUL Class I Div 2
Enclosure IP40 (DIN Rail)
Compliance ISO 10816, API 670

Main Features and Advantages

Advanced Diagnostics: Dual-channel validation detects sensor degradation, cable faults, or short circuits, triggering mA saturation (21.5 mA) for immediate DCS alerting. Autocalibration ensures long-term measurement stability without manual intervention.

Intrinsic Safety: Loop-powered design and <100>

Flexible Configuration: DIP switches select velocity/acceleration mode, filter ranges (10Hz–1kHz), and damping (0.1s–10s). TEDS sensor support automates parameterization.

Ruggedized Reliability: Stainless steel housing resists corrosion in offshore/marine environments. MIL-STD-202G vibration/shock compliance ensures operation in >5g RMS conditions.

Application Field

The Bently Nevada 128229-01 protects high-value rotating equipment:

 

Power Generation: Monitors steam turbine bearings and generator stators for imbalance/misalignment, preventing forced outages in coal/nuclear plants.

 

O&G Compressors: Detects surge/stall in centrifugal compressors (API 618/672), enabling preemptive shutdowns before catastrophic failure.

 

Water/Wastewater: Screens pump cavitation in critical cooling water systems using 4–20mA trend data for CBM programs.

 

Mining: Tracks vibration in conveyor drive motors and crushers exposed to dust/shock loads.

 

Related Products

 

Bently Nevada 330400-02-00: Proximity probe system – For shaft displacement monitoring.

 

Bently Nevada 330130-040-00-00: Accelerometer – IEPE sensor for 128229-01 input.

 

Bently Nevada 3500/42M: Vibration monitor – Integrates 128229-01 signals into machinery protection system.

 

Bently Nevada 1900/65A: Velocity sensor – Rugged transducer for high-temperature points.

 

TK-3E: Calibrator – Verifies 128229-01 output accuracy during maintenance.

 

Bently Nevada Trendmaster™ DX: Software – Analyzes 4–20mA vibration trends.

BENTLY 128229-01

BENTLY 128229-01

Installation and Maintenance

Pre-installation preparation: Verify sensor compatibility (IEPE constant current 2–10 mA). Ground sensor shields at one point only. Use shielded twisted-pair cables (<500>

Maintenance recommendations: Quarterly verification of output (4mA = 0 vibration; 20mA = full scale). Annual calibration with portable shaker. Replace sensors every 5 years in high-heat environments. Monitor mA values for diagnostic saturation (21.5 mA).

 

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