Product Overview
When rotating machinery operates under demanding conditions, reliable vibration monitoring is essential. The Bently Nevada 177230-02-01-CN is a seismic transmitter engineered to deliver accurate, real-time vibration data for predictive maintenance and asset protection. This industrial automation module converts dynamic acceleration into a standard 4-20 mA signal, making it a direct interface for PLC, DCS, and SCADA systems.
Built with a hermetically sealed 316L stainless steel case, the 177230-02-01-CN withstands harsh environments, including 100% non-submerged humidity. Its compact design (25.4 mm diameter, 66.0 mm height) and versatile mounting threads (M6, M8, ¼-28 UNF) simplify integration into existing machinery. Whether you are upgrading legacy vibration sensors or adding condition monitoring to critical assets, this transmitter offers dependable performance.
Key Features & Benefits
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Direct 4-20 mA output – Compatible with most PLC, DCS, and SCADA analog input modules.
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Wide measurement range – 0 to 50.8 mm/s (0 to 2.0 in/s) RMS, covering common industrial vibration levels.
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Frequency response – 10 Hz to 1 kHz (600 to 60 kcps) RMS, suitable for rotating equipment monitoring.
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Rugged construction – 316L stainless steel case and connector, hermetically sealed sensor, operating from -40°C to +85°C.
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Low power consumption – Excitation voltage 12 to 30 Vdc, current limited to 40 mA; works with typical PLC/DCS supplies (30-35 mA).
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Easy mounting – 1/4-28 UNF mounting hole, with M6 and M8 thread options; mounting torque 4 to 7 N-m.
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High resonant frequency – Greater than 12 kHz mounted, minimizing structural interference.
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Low transverse sensitivity – Less than 5% of sensitivity, ensuring accurate axial measurements.
Technical Specifications
| Parameter |
Value |
| Product Type |
Seismic Transmitter |
| Measurement Range |
0 – 50.8 mm/s (0 – 2.0 in/s) RMS |
| Frequency Response |
10 Hz to 1 kHz (600 to 60 kcps) RMS |
| Output Signal |
4 to 20 mA current loop (Pin A to Pin B) |
| Full Scale Range |
01 – 25.4 mm/s (1.0 in/s) ±10% |
| Sensitivity (Main Loop) |
4 ±0.3 mA = 0.0 mm/s; 20 ±2 mA = Full Scale |
| Excitation Voltage |
12 to 30 Vdc (current limited to 40 mA) |
| Settling Time |
< 15 seconds within 2% of final value |
| Mounted Resonant Frequency |
> 12 kHz |
| Transverse Sensitivity |
< 5% of sensitivity |
| Sensing Element |
Ceramic / Shear |
| Operating Temperature |
-40°C to +85°C (-40°F to +185°F) |
| Electrical Isolation |
> 10^8 ohms |
| Isolation Breakdown Voltage |
600 Vrms with < 1 mA leakage |
| Shock Survivability |
9.810 m/s² (1.000 g peak) max drop test |
| Relative Humidity |
To 100% non-submerged |
| Magnetic Field Sensitivity |
< 20 μm/s/gauss (790 μin/s/gauss) peak; < 14.7 mm/s²/gauss (150 μg/gauss) peak |
| Case Material |
316L stainless steel |
| Connector |
3-pin MIL-C-5015, 316L stainless steel |
| Mounting Hole |
1/4-28 UNF |
| Mounting Threads |
M6 x 1 SI, M8 x 1.25 SI, ¼-28 UNF |
| Mounting Torque |
4 to 7 N-m (35.4 to 62.0 in-lbf) |
| Weight |
131 g (4.62 oz), typical |
| Approvals |
CN Country Specific |
Note: Output signal is proportional to peak vibration levels.
Industry Applications
The Bently Nevada 177230-02-01-CN excels in industries where machinery health directly impacts uptime and safety. Common applications include:
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Pumps and compressors – Monitor casing vibration to detect imbalance, misalignment, or bearing wear.
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Motors and generators – Provide continuous vibration data to protect rotating electrical equipment.
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Fans and blowers – Ensure smooth operation in HVAC, cooling, and ventilation systems.
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Machine tools – Integrate with CNC or production lines for condition-based maintenance.
Because the 177230-02-01-CN outputs a standard 4-20 mA loop, it connects easily to existing control systems, reducing installation cost and complexity.
Installation & Setup Guide
Proper installation is critical for accurate vibration readings. Follow these steps:
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Mounting surface – Ensure the mounting surface is flat, clean, and free of paint or debris. Recommended mounting torque is 4 to 7 N-m (35.4 to 62.0 in-lbf).
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Thread selection – Choose the appropriate mounting thread (M6, M8, or ¼-28 UNF) that matches your machine tapping.
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Wiring – Connect per the pinout: Pin A (4-20 mA positive loop), Pin B (loop return), Pin C (dynamic acceleration signal). Use shielded cable to minimize noise.
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Power supply – Provide 12 to 30 Vdc with current limiting to 40 mA. Most PLC/DCS supplies (30-35 mA) are compatible.
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Orientation – Mount the sensor along the measurement axis. For radial vibration, orient perpendicular to the shaft. For axial, align with the shaft axis.
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Verification – After installation, check the output at zero vibration (should be 4 ±0.3 mA) and at full scale (20 ±2 mA).
Allow the transmitter to settle for at least 15 seconds before taking critical readings.
Maintenance & Reliability
The hermetically sealed design and 316L stainless steel construction make the 177230-02-01-CN virtually maintenance-free. However, periodic checks are recommended:
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Visual inspection – Check the connector and cable for damage or corrosion.
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Calibration check – Verify output at zero and full scale annually or per site schedule.
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Environmental conditions – Although rated for 100% humidity (non-submerged), avoid prolonged submersion or chemical exposure.
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Shock events – After any severe impact, re-verify mounting torque and sensor output.
Routine checks help maintain measurement integrity, reducing unplanned downtime and extending equipment life.
Buying Guide
Before purchasing the Bently Nevada 177230-02-01-CN, confirm your system's power supply and input card compatibility. The transmitter requires 12-30 Vdc and outputs a 4-20 mA signal, so any analog input module accepting 4-20 mA will work. Also verify the mounting thread and connector style meet your installation requirements.
PLC Source PRO offers this industrial automation module with genuine manufacturer support. When you order the 177230-02-01-CN from PLC Source PRO, you receive a factory-sealed unit ready for deployment. Contact our team for availability and lead times.