177230-01-02-05 | Bently Nevada 25.4 mm/s Seismic Transmitter

Introduction to the Bently Nevada 177230-01-02-05

When machinery vibration threatens uptime, the 177230-01-02-05 from Bently Nevada provides a dependable solution. This seismic transmitter converts vibration levels into a standard 4-20 mA current loop signal, making it ideal for integration with PLCs, DCS, and SCADA systems. Its robust design and precise measurement capabilities help you monitor rotating equipment effectively.

Key Features and Technical Specifications

The 177230-01-02-05 is engineered for accuracy and durability. Below are the core specifications extracted from the official datasheet:

• Measurement Range: 0 – 25.4 mm/s (0 – 1.0 in/s) peak
• Frequency Response: 3 Hz to 1 kHz (±10%)
• 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
• Sensing Element: Ceramic / Shear
• 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 4-20 mA loop output that directly interfaces with existing control systems. This simplifies wiring and reduces the need for additional signal conditioning equipment.

Applications and Use Cases

The 177230-01-02-05 is well-suited for vibration monitoring on fans, pumps, motors, and other rotating machinery. In industrial plants, it helps detect imbalance, misalignment, and bearing wear early. For example, a facility using a DCS can integrate this transmitter to continuously track vibration levels and trigger alarms when thresholds are exceeded. Its hermetically sealed sensor and 100% non-submerged humidity rating make it reliable in harsh environments.

Installation and Mounting

Proper installation is critical for accurate readings. The transmitter features a 1/4-28 UNF mounting hole and also supports M6 x 1 SI and 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 stress on the sensor. The 3-pin MIL-C-5015 connector simplifies wiring: Pin A is the 4-20 mA positive loop, Pin B is the loop return, and Pin C provides a dynamic acceleration signal.

Maintenance and Reliability

Routine maintenance of the 177230-01-02-05 is straightforward. Periodically inspect the connector and cable for damage, and verify that the mounting torque remains within specification. Because the sensor is hermetically sealed, it requires minimal internal upkeep. The 316L stainless steel case resists corrosion, extending service life in demanding industrial settings. Regular calibration checks ensure measurement accuracy over time.

Compatibility and Integration

This transmitter is designed for use with PLCs, DCS, and SCADA systems that have internal power supplies typically current-limited between 30 mA and 35 mA. Its 4-20 mA output is universally accepted, allowing easy integration into existing control loops. The dynamic acceleration signal on Pin C can be used for additional diagnostics when connected to a suitable monitoring device.

Comparison with Similar Products

Compared to other seismic transmitters, the 177230-01-02-05 stands out due to its wide frequency response (3 Hz to 1 kHz) and high resonant frequency (>12 kHz). Many competing models offer narrower bandwidths, limiting their ability to capture high-frequency vibrations. Additionally, the hermetically sealed 316L stainless steel construction provides superior environmental protection versus plastic-housed alternatives.

FAQ

Q: What is the measurement range of the 177230-01-02-05?

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

Q: What output signal does this transmitter provide?

A: It provides a 4-20 mA current loop output from Pin A to Pin B, proportional to peak 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 it be used in hazardous areas?

A: Yes, it has multiple approvals including CSA/NRTL/C and ATEX/IECEx.

Q: What is the mounting torque requirement?

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

Product Support and Availability

The 177230-01-02-05 is available through Petro Auto Tech, a trusted industrial automation parts supplier. Contact Petro Auto Tech for current pricing, lead times, and technical support. Ensure you verify lifecycle status before ordering.