177230-01-01-CN | Bently Nevada Seismic Transmitter 25.4 mm/s

Introduction to the 177230-01-01-CN

When machinery vibration threatens uptime, the 177230-01-01-CN from Bently Nevada provides a dependable solution. This seismic transmitter converts vibration levels into a standard 4-20 mA current loop signal, enabling seamless integration with PLCs, DCS, and SCADA systems. Designed for continuous operation, it helps maintenance teams detect issues early and avoid costly downtime.

Key Features and Technical Specifications

The 177230-01-01-CN is engineered for accuracy and durability. Its key specifications include:

• Measurement range: 0 – 25.4 mm/s (0 – 1.0 in/s) RMS
• Frequency response: 10 Hz to 1 kHz (600 to 60 kcpm) RMS
• Output signal: 4-20 mA current loop (Pin A to Pin B)
• 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)
• Relative humidity: to 100% non-submerged
• 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 hermetically sealed sensor, which ensures reliable performance even in harsh environments. This makes the transmitter ideal for applications where moisture or dust could compromise lesser units.

Applications and Use Cases

In rotating machinery monitoring, the 177230-01-01-CN excels at providing real-time vibration data. For example, in a paper mill, continuous monitoring of dryer rolls can prevent bearing failures. Similarly, in a chemical plant, the transmitter helps track pump vibration to schedule maintenance proactively. Because it outputs a standard 4-20 mA signal, it easily connects to existing control systems, reducing integration effort.

Installation and Setup

Proper installation is critical for accurate readings. The transmitter mounts via a 1/4-28 UNF hole or M6 x 1 SI / M8 x 1.25 SI threads. Recommended mounting torque is 4 to 7 N-m (35.4 to 62.0 in-lbf). Ensure the mounting surface is clean and flat to avoid distortion. Wiring follows the connector convention: Pin A for 4-20 mA positive loop, Pin B for loop return, and Pin C for dynamic acceleration signal. Always refer to the official manual for detailed wiring diagrams.

Maintenance and Reliability

Routine inspection of the transmitter and its connections helps maintain accuracy. Because the unit is hermetically sealed, it resists moisture ingress, reducing maintenance frequency. The 316L stainless steel case withstands corrosive environments, extending service life. For best results, verify the output signal periodically against a known vibration source.

Compatibility and Integration

The 177230-01-01-CN is designed for use with PLCs, DCS, and SCADA systems that have internal power supplies typically current-limited to 30-35 mA. Its 4-20 mA output is universally accepted, making integration straightforward. The dynamic acceleration signal on Pin C provides additional diagnostic capability for advanced monitoring.

Troubleshooting Common Issues

If the output signal is erratic, check the excitation voltage and loop resistance. Ensure the transmitter is mounted securely and not subject to excessive transverse vibration. If readings drift, verify the sensor is within its operating temperature range. For persistent issues, consult the Bently Nevada documentation or contact Petro Auto Tech for support.

FAQ

Q: What is the measurement range of the 177230-01-01-CN?

A: The measurement range is 0 – 25.4 mm/s (0 – 1.0 in/s) RMS.

Q: What output signal does the transmitter provide?

A: It provides a 4-20 mA current loop signal proportional to RMS vibration levels.

Q: What is the operating temperature range?

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

Q: Can the transmitter be used in humid environments?

A: Yes, it is rated for relative humidity up to 100% non-submerged.

Q: What is the excitation voltage requirement?

A: The excitation voltage is 12 to 30 Vdc, with current limited to 40 mA.

Product Support and Availability

The 177230-01-01-CN is available through Petro Auto Tech. Contact our team for current pricing and lead times. We are ready to assist with your vibration monitoring needs.