177230-00-02-05 | Bently Nevada Seismic Transmitter 0-12.7 mm/s

What Is the Bently Nevada 177230-00-02-05?

The 177230-00-02-05 is a seismic transmitter from Bently Nevada, engineered to convert vibration signals into a standard 4-20 mA current loop output. This makes it an ideal choice for PLC, DCS, and SCADA systems that rely on analog inputs for machinery protection and condition monitoring.

With a measurement range of 0 to 12.7 mm/s (0 to 0.5 in/s) peak, the transmitter provides proportional output to vibration levels. Its compact design and robust construction ensure reliable performance in demanding industrial environments.

Key Features & Technical Specifications

• Measurement range: 0 to 12.7 mm/s (0 to 0.5 in/s) peak, with ±10% accuracy.
• Frequency response: 3 Hz to 1 kHz (180 to 60 kcpm) ±10%.
• Output signal: 4-20 mA current loop from Pin A to Pin B, proportional to peak 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.
• Operating temperature: -40°C to +85°C (-40°F to +185°F).
• Case material: 316L stainless steel, hermetically sealed.
• Connector: 3-pin MIL-C-5015, 316L stainless steel.
• Mounting hole: 1/4-28 UNF; mounting threads: M6 x 1 SI, M8 x 1.25 SI, ¼-28 UNF.
• Weight: 0.131 kg (4.62 oz).

These specifications make the 177230-00-02-05 a precise and durable solution for vibration monitoring.

Applications and Use Cases

This seismic transmitter is well-suited for rotating machinery such as pumps, fans, and motors. It integrates seamlessly with existing control systems, providing real-time vibration data that helps prevent unplanned downtime.

For example, in a typical plant, the transmitter can be mounted on a bearing housing to monitor vibration levels continuously. The 4-20 mA output allows direct connection to a PLC analog input, enabling alarm and shutdown logic based on vibration thresholds.

Installation and Setup

Mount the transmitter securely using the provided mounting hole (1/4-28 UNF) or optional M6/M8 threads. Apply a mounting torque of 4 to 7 N-m (35.4 to 62.0 in-lbf) to ensure proper contact and accurate readings.

Wire the connector as follows: Pin A is the 4-20 mA positive loop, Pin B is the loop return (negative), and Pin C provides an unbuffered dynamic acceleration signal referenced to Pin B. Ensure the power supply is current-limited between 30 mA and 35 mA for optimal operation.

Maintenance and Reliability

The hermetically sealed 316L stainless steel case protects the internal sensing element from harsh environments, including 100% non-submerged humidity. This design minimizes maintenance needs and extends service life.

Regularly inspect the mounting integrity and connector condition to ensure consistent performance. The transmitter's high resonant frequency (>12 kHz) and low transverse sensitivity (<5%) contribute to reliable measurements over time.

Compatibility and Integration

The 177230-00-02-05 is designed for use with PLCs, DCS, and SCADA systems that have internal power supplies. Its 4-20 mA output is universally accepted by most analog input modules, making integration straightforward.

For systems requiring dynamic vibration data, the unbuffered signal on Pin C can be connected to a data collector or analyzer. This flexibility allows both continuous monitoring and detailed diagnostics.

Frequently Asked Questions

Q: What is the output signal of the 177230-00-02-05?

A: The transmitter provides a 4-20 mA current loop output from Pin A to Pin B, proportional to peak vibration levels.

Q: What is the measurement range of this seismic transmitter?

A: The measurement range is 0 to 12.7 mm/s (0 to 0.5 in/s) peak, with an accuracy of ±10%.

Q: What power supply is required?

A: It requires an excitation voltage of 12 to 30 Vdc, with current limited to 40 mA. The power supply should be current-limited between 30 mA and 35 mA for typical use.

Q: How do I mount the transmitter?

A: 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).

Q: What are the environmental limits?

A: Operating temperature ranges from -40°C to +85°C, and relative humidity up to 100% non-submerged.

Product Support and Availability

The Bently Nevada 177230-00-02-05 is available through Petro Auto Tech. Contact our team to verify current lifecycle status and availability before ordering.