Bently Nevada 177230-01-01-CN Seismic Transmitter

Bently Nevada 177230-01-01-CN Seismic Transmitter

Product Introduction

The Bently Nevada 177230-01-01-CN provides reliable machinery protection. This seismic transmitter measures absolute vibration velocity. It outputs a standard 4-20 mA loop signal proportional to RMS levels. You can use it with most industrial control systems. Specifically, it works with PLCs, DCS, and SCADA platforms. The device features a hermetically sealed 316L stainless steel body. Its ceramic shear sensing element ensures stable performance. Additionally, the 177230-01-01-CN offers a wide operating temperature range from -40°C to +85°C. Many customers choose this model for continuous vibration monitoring on pumps, fans, compressors, and turbines.

Key Technical Specifications

The Bently Nevada 177230-01-01-CN delivers a measurement range of 0 – 25.4 mm/s (0 – 1.0 in/s). Its frequency response is 10 Hz to 1 kHz (600 to 60 kcpm) with ±10% accuracy. The main loop output provides 4 ± 0.3 mA at 0.0 mm/s. At full scale, it reaches 20 ± 2 mA. Settling time stays under 15 seconds within 2% of the final value. Moreover, the mounted resonant frequency exceeds 12 kHz. Transverse sensitivity is less than 5% of the main sensitivity. The sensing element uses a ceramic shear design.

Mechanical and Environmental Limits

This transmitter operates from -40°C to +85°C (-40°F to +185°F). It survives 100% relative humidity as long as it is not submerged. Electrical isolation exceeds 10^8 ohms. Breakdown voltage reaches 600 Vrms with less than 1 mA leakage. Shock survivability meets a 9.810 m/s² (1 g peak) drop test. The sensor seal is hermetic. Magnetic field sensitivity stays below 20 μm/s/gauss peak. Furthermore, the 177230-01-01-CN uses a 316L stainless steel case and connector. The 3-pin MIL-C-5015 connector also uses 316L stainless steel.

Physical Dimensions and Mounting

Diameter measures 25.4 mm (1.00 in). Total height is 66.0 mm (2.60 in). Typical weight reaches 131 g (4.62 oz). The mounting hole in the body uses a 1/4-28 UNF thread. You can also order M6 x 1 SI or M8 x 1.25 SI mounting threads. Recommended mounting torque is 4 to 7 N-m (35.4 to 62.0 in-lbf). For best results, clean the mounting surface before installation. Apply a thin layer of grease to the mounting stud. Next, hand-tighten the sensor, then torque it to specification. Do not overtighten, or you may damage the threads.

Installation Guidelines for the 177230-01-01-CN

First, verify that your power supply provides 12-30 Vdc with current limiting around 30-35 mA. Connect Pin A to the positive loop input of your PLC or DCS. Connect Pin B to the loop return. If you need the dynamic acceleration signal, connect Pin C to a high-impedance analog input. Use shielded twisted-pair cables for all wiring. Ground the shield only at the control system end. Meanwhile, ensure the mounting surface is flat and rigid. For temporary installations, use a magnetic mount. For permanent installations, drill and tap a 1/4-28 UNF hole directly into the machine housing. Finally, apply the specified torque of 4-7 N-m.

Why Choose This Bently Nevada Seismic Transmitter?

This model delivers both a 4-20 mA trend signal and a raw dynamic output. Consequently, you save on additional sensors and wiring. The stainless steel construction resists corrosion in harsh environments. Its wide frequency range captures low-speed as well as high-speed machinery faults. Additionally, the Bently Nevada 177230-01-01-CN requires no external signal conditioner. It connects directly to standard analog input cards. Many reliability engineers trust Bently Nevada for critical asset protection. Therefore, this transmitter fits perfectly in predictive maintenance programs.

Packaging List

• 1 x Bently Nevada 177230-01-01-CN Seismic Transmitter

• 1 x 1/4-28 UNF mounting stud (pre-installed)

• 1 x protective cap for connector

• 1 x quick start guide (printed)

• 1 x CN approvals field notification letter

Note: Shipping via Fedex, UPS, DHL only. No certificates or warranty documents are included in the package.

Frequently Asked Questions (FAQ)

1. Can I use the 177230-01-01-CN directly with a 24V PLC input card?
Yes, absolutely. The transmitter accepts 12-30 Vdc. Most PLC analog input cards provide 24V with current limiting around 30 mA. Simply connect Pin A to the card's positive terminal and Pin B to the negative terminal.

2. What does the "CN" approval option mean for this model?
The CN suffix indicates country-specific approvals. A separate field notification letter and quick reference guide describe those approvals. You will find these documents in the download section on the official product page.

3. How do I interpret the dynamic signal on Pin C?
Pin C outputs an unbuffered acceleration signal referenced to Pin B. This signal is not amplified or conditioned. You must connect it to a high-impedance input (typically >100 kΩ). Use a separate analog input channel for this signal.

4. Can the Bently Nevada 177230-01-01-CN survive in condensing humidity?
Yes, it can. The transmitter is hermetically sealed and rated for up to 100% relative humidity as long as it is not submerged. However, avoid direct water spray on the connector area.

5. What happens if I exceed the 30Vdc excitation voltage?
Exceeding 30Vdc may damage the internal current-limiting circuit. This damage is not repairable in the field. Always double-check your power supply before connecting the sensor. Stay within 12-30 Vdc for reliable operation.