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

Introduction to the Bently Nevada 177230-01-01-CN

When rotating machinery vibration threatens uptime, the 177230-01-01-CN provides a dependable solution. This seismic transmitter from Bently Nevada converts vibration into a standard 4-20 mA signal, making it ideal for PLC, DCS, and SCADA systems. Its rugged design and precise measurement help you maintain equipment health and avoid unplanned downtime.

Key Features and Technical Specifications

The 177230-01-01-CN is engineered for accuracy and durability. Below are the core parameters you can expect:

• Measurement range: 0 to 25.4 mm/s (0 to 1.0 in/s) RMS
• Frequency response: 10 Hz to 1 kHz (600 to 60 kcpm) ±10%
• Output signal: 4-20 mA current loop (proportional to RMS vibration)
• Excitation voltage: 12 to 30 Vdc (current limited to 40 mA)
• Operating temperature: -40°C to +85°C (-40°F to +185°F)
• Case material: 316L stainless steel
• Connector: 3-pin MIL-C-5015, 316L stainless steel
• Weight: 131 g (4.62 oz) typical

One distinctive spec is the mounted resonant frequency greater than 12 kHz, which ensures minimal interference in high-frequency environments. This makes the transmitter suitable for applications where accurate vibration data is critical.

Applications and Use Cases

This seismic transmitter is designed for use with PLCs, DCS, and SCADA systems that have internal power supplies typically current limited to 30-35 mA. It is well-suited for monitoring pumps, fans, compressors, and other rotating equipment in industries such as manufacturing, energy, and process control. For example, in a predictive maintenance program, the 4-20 mA loop output allows seamless integration with existing control systems, enabling continuous vibration trending and alarm management.

Installation and Setup

Proper installation ensures accurate readings. The transmitter features a 1/4-28 UNF mounting hole and optional M6 x 1 SI or M8 x 1.25 SI threads. Recommended mounting torque is 4 to 7 N-m (35.4 to 62.0 in-lbf). 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. Always follow the manufacturer's manual for specific wiring and configuration steps.

Maintenance and Reliability

The 316L stainless steel case and hermetically sealed sensor ensure long-term reliability, even in harsh environments. With a relative humidity rating to 100% non-submerged, it withstands humid conditions. Regular inspection per the manufacturer's guidelines helps verify operation and extend service life. The transmitter's shock survivability of 9,810 m/s² (1,000 g peak) drop test adds robustness.

Compatibility and Integration

This transmitter is compatible with any system accepting a 4-20 mA input, making it a versatile choice for retrofits or new installations. Its low power requirement (12-30 Vdc) aligns with typical PLC/DCS power supplies. For systems requiring dynamic vibration data, the unbuffered acceleration signal on Pin C offers additional diagnostic capability.

Buyer's Guide: Evaluating Your Needs

When selecting a seismic transmitter, consider the measurement range, frequency response, and environmental limits. The 177230-01-01-CN covers 0-25.4 mm/s with a 10 Hz to 1 kHz response, suitable for most industrial vibration monitoring. Its compact size (25.4 mm diameter, 66.0 mm height) fits tight spaces. Verify that your control system's power supply can deliver the required excitation voltage and current limit.

Frequently Asked Questions

Q: What is the output signal of the 177230-01-01-CN?

A: The transmitter provides a 4-20 mA current loop output proportional to RMS vibration levels.

Q: What is the operating temperature range?

A: It operates from -40°C to +85°C (-40°F to +185°F).

Q: Can I use this transmitter with a PLC?

A: Yes, it is designed for PLC, DCS, and SCADA systems with internal power supplies current limited to 30-35 mA.

Q: What is the mounting thread size?

A: The body has a 1/4-28 UNF mounting hole, with optional M6 x 1 SI and M8 x 1.25 SI threads.

Q: How do I wire the connector?

A: Pin A is 4-20 mA positive, Pin B is loop return, and Pin C is dynamic acceleration signal.

Support and Availability

The 177230-01-01-CN is available through Petro Auto Tech. Contact us for current lifecycle status and availability before ordering. Our team can assist with technical questions and ensure you receive the right product for your application.