Bently Nevada 177230-02-01-CN Seismic Transmitter for Vibration Monitoring

Introduction

When unplanned machinery downtime threatens production targets, accurate vibration monitoring becomes essential. The Bently Nevada 177230-02-01-CN is a seismic transmitter engineered to deliver reliable, real-time vibration data for rotating and reciprocating equipment. This compact, hermetically sealed sensor integrates seamlessly with PLC, DCS, and SCADA systems, providing a 4-20 mA current loop output proportional to peak vibration levels. Built for demanding conditions, it offers 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.

Technical Specifications Breakdown

The 177230-02-01-CN features a ceramic shear sensing element with transverse sensitivity less than 5% of sensitivity, ensuring accurate readings even in the presence of cross-axis motion. Its main loop sensitivity is calibrated so that 4 ± 0.3 mA equals 0.0 mm/s and 20 ± 2 mA equals the full-scale range. The full-scale range option 01 provides 25.4 mm/s (1.0 in/s) ± 10%. The transmitter operates on an excitation voltage of 12 to 30 Vdc, current limited to 40 mA, and has a settling time of less than 15 seconds within 2% of final value. The mounted resonant frequency exceeds 12 kHz, and electrical isolation is greater than 108 ohms with an isolation breakdown voltage of 600 Vrms. The device is housed in a 316L stainless steel case with a 3-pin MIL-C-5015 connector, also 316L stainless steel. It weighs 0.131 kg and measures 25.4 mm (1.00 in) in diameter and 66.0 mm (2.60 in) in height.

Industry Applications

This seismic transmitter is ideal for monitoring vibration on pumps, fans, compressors, turbines, and motors in industries such as oil and gas, power generation, petrochemical, and water treatment. Its 4-20 mA output simplifies integration with existing control systems, enabling continuous condition monitoring and early fault detection. The transmitter operates reliably in environments with relative humidity up to 100% non-submerged and over a temperature range of -40°C to +85°C (-40°F to +185°F). The CN country-specific approval ensures compliance for installations in China.

Installation & Setup Guidance

Mount the 177230-02-01-CN using the 1/4-28 UNF mounting hole or optional M6 x 1 SI or M8 x 1.25 SI threads. Apply a mounting torque of 4 to 7 N-m (35.4 to 62.0 in-lbf). Connect Pin A to the 4-20 mA positive loop, Pin B to the loop return (negative), and Pin C for the dynamic acceleration signal (unbuffered, referenced to Pin B). Ensure the power supply is current limited between 30 mA and 35 mA for typical PLC/DCS/SCADA inputs. Allow the transmitter to settle for at least 15 seconds after power-up before taking critical measurements.

Maintenance & Reliability

The hermetically sealed sensor and 316L stainless steel construction provide excellent resistance to moisture, corrosion, and mechanical shock. With shock survivability tested to 9.810 m/s² (1.000 g peak) maximum drop test, the transmitter is built for long-term field service. Periodic inspection of the connector and cable integrity is recommended. No internal adjustments are required; the factory-calibrated sensitivity remains stable over the operating life.

Selection Guide & Purchasing Advice

When selecting the 177230-02-01-CN, verify that the full-scale range and frequency response options match your application requirements. The standard configuration includes full-scale range code 01 (25.4 mm/s) and frequency response code 02 (3 Hz to 1 kHz ± 10%). For complete technical specifications and current availability, please contact BluePLC Industrial, your trusted source for Bently Nevada automation components.