Product Overview
When machinery vibration threatens uptime, the Bently Nevada 177230-02-02-05 Seismic Transmitter provides reliable, real-time data for condition monitoring. This industrial-grade sensor converts peak vibration levels into a proportional 4-20 mA current loop signal, making it a direct fit for PLC, DCS, and SCADA systems. Its hermetically sealed 316L stainless steel construction withstands harsh environments, and its compact 25.4 mm diameter and 66.0 mm height allow installation in tight spaces.
Technical Specifications Breakdown
The 177230-02-02-05 offers a measurement range of 0 to 50.8 mm/s (0 to 2.0 in/s) peak, with a frequency response of 3 Hz to 1 kHz (180 to 60 kcpm) ±10%. The main loop sensitivity is calibrated so that 4 ± 0.3 mA equals 0.0 mm/s and 20 ± 2 mA equals full-scale range. Excitation voltage is 12 to 30 Vdc, current limited to 40 mA. Settling time is less than 15 seconds within 2% of final value. The mounted resonant frequency exceeds 12 kHz, and transverse sensitivity is less than 5% of sensitivity. The sensing element is ceramic/shear type. Operating temperature range is -40°C to +85°C (-40°F to +185°F). The transmitter withstands 100% non-submerged relative humidity and has a shock survivability of 9.810 m/s² (1.000 g peak) maximum drop test. Electrical isolation is greater than 108 ohms with an isolation breakdown voltage of 600 Vrms at less than 1 mA leakage current.
Industry Applications
In rotating machinery such as pumps, fans, compressors, and turbines, the 177230-02-02-05 monitors casing vibration to detect imbalance, misalignment, or bearing wear early. Its 4-20 mA output integrates directly with existing control systems, eliminating the need for separate signal conditioners. For example, in a petrochemical plant, this transmitter can feed vibration data to a DCS for trend analysis and alarm management, helping prevent unplanned downtime.
Installation & Setup Guidance
Mount the transmitter using the ¼-28 UNF hole in the body, applying a mounting torque of 4 to 7 N-m (35.4 to 62.0 in-lbf). Alternative mounting threads include M6 x 1 SI and M8 x 1.25 SI. The 3-pin MIL-C-5015 connector (316L SS) follows this wiring convention: Pin A is 4-20 mA positive loop, Pin B is loop return (negative for Pin A and common for dynamic signal), and Pin C is dynamic acceleration signal (unbuffered, referenced to Pin B). Ensure the excitation voltage is between 12 and 30 Vdc and that the system’s internal power supply current limits are in the typical range of 30 mA to 35 mA.
Maintenance & Reliability
The hermetically sealed sensor and 316L stainless steel case provide excellent corrosion resistance and long service life in humid or washdown environments. No routine disassembly or cleaning is needed; periodic verification of the 4-20 mA loop and visual inspection of the connector and mounting integrity are sufficient. The transmitter’s robust design minimizes drift, reducing calibration frequency and overall maintenance costs.
Compatibility & Integration
This seismic transmitter is designed for use with PLCs, DCS, and SCADA systems that accept a 4-20 mA input. The dynamic acceleration signal on Pin C can be used for additional analysis if required. The product carries Multiple Approvals (CSA/NRTL/C, ATEX/IECEx), ensuring suitability for hazardous area installations. Always verify system compatibility and approval requirements before ordering.
Selection Guide & Purchasing Advice
Before purchasing the 177230-02-02-05, confirm the measurement range and frequency response match your application: the -AA option specifies full-scale range (01 = 25.4 mm/s ±10%) and -BB option specifies frequency response (02 = 3 Hz to 1 kHz ±10%). Ensure your system’s excitation voltage and current limiting are compatible. SpareTechPLC stocks this Bently Nevada transmitter and can assist with availability and replacement options. Please verify current lifecycle status with our team before ordering.
Frequently Asked Questions
Q: What is the output signal of the 177230-02-02-05?
A: The output is a 4-20 mA current loop from Pin A to Pin B, proportional to peak vibration levels. 4 mA corresponds to 0.0 mm/s, and 20 mA corresponds to the full-scale range.
Q: What is the operating temperature range?
A: The transmitter operates from -40°C to +85°C (-40°F to +185°F).
Q: Can this transmitter be used in hazardous areas?
A: Yes, the 177230-02-02-05 has Multiple Approvals including CSA/NRTL/C and ATEX/IECEx, making it suitable for hazardous locations.
Q: What is the mounting thread size?
A: The mounting hole in the body is ¼-28 UNF. Alternative mounting threads include M6 x 1 SI and M8 x 1.25 SI. Recommended mounting torque is 4 to 7 N-m.
Q: How long does it take for the output to settle after power-up?
A: Settling time is less than 15 seconds within 2% of final value.
