177230-00-01-CN | Bently Nevada Seismic Transmitter 0-12.7 mm/s

Introduction: The Evolution of Vibration Monitoring

For decades, industrial plants have relied on vibration monitoring to protect rotating machinery. Early systems were bulky and complex, but today's transmitters offer compact, loop-powered solutions. The 177230-00-01-CN from Bently Nevada represents this evolution, combining a rugged 316L stainless steel case with a 4-20 mA output for seamless integration into modern control systems.

What Is the 177230-00-01-CN?

The 177230-00-01-CN is a seismic transmitter designed for continuous vibration monitoring. It converts dynamic acceleration into a proportional 4-20 mA current loop signal, making it ideal for PLC, DCS, and SCADA systems. With a measurement range of 0 to 12.7 mm/s (0 to 0.5 in/s) RMS and a frequency response of 10 Hz to 1 kHz, it covers the most common machinery vibration frequencies.

Key Features & Technical Specifications

• Measurement Range: 0 – 12.7 mm/s (0 – 0.5 in/s) RMS
• Frequency Response: 10 Hz to 1 kHz (600 to 60 kcpm) ±10%
• Output Signal: 4-20 mA current loop, proportional to RMS vibration
• 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
• Sensing Element: Ceramic / Shear type
• Case Material: 316L stainless steel
• Connector: 3-pin MIL-C-5015, 316L stainless steel
• Mounting Hole: 1/4-28 UNF
• Weight: 131 g (4.62 oz) typical
• Operating Temperature: -40°C to +85°C (-40°F to +185°F)
• Relative Humidity: To 100% non-submerged
• Electrical Isolation: Greater than 10^8 ohms
• Isolation Breakdown Voltage: 600 Vrms with less than 1 mA leakage
• Shock Survivability: 9.810 m/s² (1.000 g peak), maximum drop test
• Magnetic Field Sensitivity: Less than 20 μm/s/gauss (790 μin/s/gauss) peak

Why Choose This Seismic Transmitter?

The 177230-00-01-CN offers a unique combination of ruggedness and precision. Its 316L stainless steel case and connector withstand harsh environments, while the ceramic shear sensing element provides stable, accurate readings. The 4-20 mA output simplifies wiring and reduces noise, making it a cost-effective choice for long-term reliability.

Installation & Setup

Mounting the transmitter is straightforward. Use the 1/4-28 UNF mounting hole or optional M6 x 1 SI, M8 x 1.25 SI threads. Apply a mounting torque of 4 to 7 N-m (35.4 to 62.0 in-lbf) to ensure a secure fit. Connect Pin A to the positive loop and Pin B to the loop return; Pin C provides an unbuffered dynamic acceleration signal. The transmitter is designed for use with PLCs, DCS, and SCADA systems that have internal power supplies typically current-limited to 30-35 mA.

Maintenance & Reliability

Because the transmitter is hermetically sealed, it requires minimal maintenance. Regular inspection per the manufacturer's manual is recommended to verify operation. Its 100% non-submerged humidity rating and wide operating temperature range ensure dependable performance in demanding conditions, reducing downtime and maintenance costs.

Compatibility & Integration

The 4-20 mA output makes the 177230-00-01-CN compatible with most industrial control systems, including PLCs, DCS, and SCADA. This universal signal type allows for easy integration into existing monitoring networks, providing real-time vibration data for predictive maintenance programs.

Frequently Asked Questions

Q: What is the measurement range of the 177230-00-01-CN?

A: The measurement range is 0 to 12.7 mm/s (0 to 0.5 in/s) RMS.

Q: What is the frequency response?

A: The frequency response is 10 Hz to 1 kHz (600 to 60 kcpm) ±10%.

Q: What is the output signal?

A: The output is a 4-20 mA current loop, 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: What is the mounting torque?

A: The recommended mounting torque is 4 to 7 N-m (35.4 to 62.0 in-lbf).

Product Support & Availability

The 177230-00-01-CN is available through Petro Auto Tech, a trusted industrial automation parts supplier. Please verify current lifecycle status and availability with Petro Auto Tech before ordering.