Product Overview
When monitoring machinery vibration in harsh industrial environments, the Bently Nevada 177230-01-02-05 Seismic Transmitter delivers reliable performance. This compact sensor measures peak vibration levels and outputs a proportional 4 to 20 mA current loop signal. Its hermetically sealed 316L stainless steel case withstands 100% non-submerged humidity and operates from -40°C to +85°C. With multiple approvals including CSA/NRTL/C, ATEX, and IECEx, it suits global applications.
Technical Specifications Breakdown
Key parameters from the datasheet help you evaluate this transmitter:
- Measurement Range: Full scale range -AA 01 provides 0 – 25.4 mm/s (0 – 1.0 in/s) ±10%.
- Frequency Response: Range -BB 02 covers 3 Hz to 1 kHz (180 cpm to 60 kcpm) ±10%.
- Output Signal: 4-20 mA current loop from Pin A to Pin B. Sensitivity is 4 ± 0.3 mA at 0.0 mm/s and 20 ± 2 mA at full scale.
- Electrical Excitation: Requires 12 to 30 Vdc, current limited to 40 mA. Designed for PLC, DCS, and SCADA systems with internal power supplies typically limited to 30–35 mA.
- Physical Dimensions: Diameter 25.4 mm (1.00 in), height 66.0 mm (2.60 in), weight 0.131 kg (4.62 oz).
- Mounting: 1/4-28 UNF mounting hole; also supports M6 x 1 SI and M8 x 1.25 SI threads. Recommended torque: 4 to 7 N-m (35.4 to 62.0 in-lbf).
- Environmental: Operating temperature -40°C to +85°C. Hermetically sealed sensor.
Industry Applications
This seismic transmitter excels in rotating machinery monitoring—pumps, fans, compressors, and turbines. Its 4-20 mA output integrates directly with existing PLC or DCS systems for continuous vibration trending. The high mounted resonant frequency (>12 kHz) and low transverse sensitivity (<5% of sensitivity) ensure accurate readings even in high-frequency environments. For example, in a refinery, the 177230-01-02-05 can be mounted on a centrifugal compressor to detect early bearing wear before unplanned downtime occurs.
Installation & Setup Guidance
Mount the transmitter using the 1/4-28 UNF hole or M6/M8 threads. Apply torque between 4 and 7 N-m. Connect wiring per the 3-pin MIL-C-5015 connector: Pin A for 4-20 mA positive loop, Pin B for loop return, and Pin C for dynamic acceleration signal (unbuffered, referenced to Pin B). Ensure the external power supply is current-limited to 40 mA or less. Allow less than 15 seconds settling time within 2% of final value after power-up.
Maintenance & Reliability
The hermetically sealed 316L stainless steel case protects against moisture and corrosion. No routine maintenance is required beyond periodic inspection of the connector and mounting integrity. The transmitter tolerates 100% non-submerged humidity and shock survivability up to 9.810 m/s² (1.000 g peak) drop test. Verify electrical isolation greater than 10⁸ ohms and isolation breakdown voltage of 600 Vrms with less than 1 mA leakage current during system checks.
Selection Guide & Purchasing Advice
Before ordering, confirm your required measurement range (01: 0–25.4 mm/s) and frequency response (02: 3 Hz–1 kHz). The 177230-01-02-05 includes multiple approvals (CSA/NRTL/C, ATEX/IECEx) for hazardous locations. SpareTechPLC stocks this Bently Nevada seismic transmitter and can advise on availability and lead times. Verify lifecycle status with SpareTechPLC before purchasing.
Frequently Asked Questions
Q: What is the output signal of the 177230-01-02-05?
A: It provides a 4 to 20 mA current loop proportional to peak vibration levels. Sensitivity is 4 ± 0.3 mA at 0.0 mm/s and 20 ± 2 mA at full scale (25.4 mm/s).
Q: What power supply voltage does this transmitter require?
A: Excitation voltage is 12 to 30 Vdc, current limited to 40 mA. It is designed for PLC, DCS, and SCADA systems with internal supplies typically limited to 30–35 mA.
Q: What mounting threads are supported?
A: The mounting hole is 1/4-28 UNF. It also supports M6 x 1 SI and M8 x 1.25 SI threads. Recommended torque is 4 to 7 N-m.
Q: Is the 177230-01-02-05 suitable for hazardous areas?
A: Yes, it carries multiple approvals: CSA/NRTL/C, ATEX, and IECEx, making it suitable for many hazardous locations.
Q: What is the operating temperature range?
A: The transmitter operates from -40°C to +85°C (-40°F to +185°F).
