177230-02-01-CN | Bently Nevada Seismic Transmitter

Introduction to the Bently Nevada 177230-02-01-CN

When unplanned downtime threatens production, the 177230-02-01-CN from Bently Nevada provides the accurate vibration data you need to act early. This seismic transmitter is engineered for continuous monitoring in demanding environments, converting vibration into a standard 4-20 mA signal for seamless integration.

With a measurement range of 0–50.8 mm/s (0–2.0 in/s) and a frequency response of 10 Hz to 1 kHz (600 to 60 kcps) RMS, this device captures critical vibration levels. Its robust 316L stainless steel construction ensures long-term durability even in harsh conditions.

Key Features and Technical Specifications

The 177230-02-01-CN is built to deliver precise, repeatable measurements. Key specifications include:

• Measurement range: 0–50.8 mm/s (0–2.0 in/s)
• Frequency response: 10 Hz to 1 kHz (600 to 60 kcps) RMS
• Output signal: 4–20 mA current loop
• Excitation voltage: 12 to 30 Vdc (current limited to 40 mA)
• Settling time: less than 15 seconds within 2% of final value
• Mounted resonant frequency: greater than 12 kHz
• Transverse sensitivity: less than 5% of sensitivity
• Operating temperature: -40°C to +85°C (-40°F to +185°F)
• Case material: 316L stainless steel
• Connector: 3-pin MIL-C-5015, 316L stainless steel
• Mounting hole: 1/4-28 UNF
• Weight: 0.131 kg (4.62 oz)

One distinctive feature is the 4–20 mA main loop with a sensitivity of 4 ± 0.3 mA at 0.0 mm/s and 20 ± 2 mA at full scale. This linear output simplifies integration with PLCs, DCS, and SCADA systems.

Real-World Applications and Benefits

In rotating machinery, excessive vibration often signals misalignment, unbalance, or bearing wear. The 177230-02-01-CN helps you detect these issues early, reducing the risk of catastrophic failure. Its frequency response covers typical machine vibration frequencies, making it suitable for fans, pumps, motors, and gearboxes.

Furthermore, the transmitter's 100% non-submerged relative humidity rating and hermetically sealed sensor ensure reliable operation in humid or wet environments. This durability translates into fewer false alarms and lower maintenance costs over the equipment's lifespan.

Installation and Setup Guidance

Proper mounting is essential for accurate readings. The 177230-02-01-CN offers a 1/4-28 UNF mounting hole, and mounting threads include M6 x 1 SI, M8 x 1.25 SI, and ¼-28 UNF. Recommended mounting torque is 4 to 7 N-m (35.4 to 62.0 in-lbf).

Wiring follows a clear convention: Pin A carries the 4-20 mA positive loop, Pin B is the loop return, and Pin C provides an unbuffered dynamic acceleration signal. Always verify the excitation voltage is within the specified 12 to 30 Vdc range to avoid damage.

Maintenance and Reliability Tips

Routine inspection of the transmitter and its connections helps maintain measurement integrity. Check the mounting torque periodically, as loose mounting can alter frequency response. Also, inspect the connector for corrosion or damage, especially in harsh environments.

Given its 316L stainless steel case and hermetically sealed sensor, the 177230-02-01-CN requires minimal maintenance under normal conditions. Following the manufacturer's guidelines ensures long-term reliability.

Compatibility and Integration

This transmitter is designed for use with PLCs, DCS, and SCADA systems that have internal power supplies typically current-limited to 30–35 mA. The 4-20 mA output simplifies wiring and reduces noise susceptibility, making it a drop-in solution for most control architectures.

Frequently Asked Questions

What is the measurement range of the 177230-02-01-CN?

The measurement range is 0–50.8 mm/s (0–2.0 in/s).

What output signal does the 177230-02-01-CN provide?

It provides a 4–20 mA current loop output proportional to peak vibration levels.

What is the operating temperature range?

The operating temperature range is -40°C to +85°C (-40°F to +185°F).

Is the 177230-02-01-CN suitable for humid environments?

Yes, it can operate in relative humidity up to 100% non-submerged.

Product Support and Availability

The 177230-02-01-CN is available through Petro Auto Tech. Contact our team for current availability and lead times. We are committed to helping you maintain reliable operations.