177230-02-02-05 | Bently Nevada Seismic Transmitter 0-50.8 mm/s

Why Choose the Bently Nevada 177230-02-02-05 Seismic Transmitter?

When machinery vibration threatens uptime, the 177230-02-02-05 from Bently Nevada provides the reliable measurement you need. This seismic transmitter converts peak vibration levels into a standard 4-20 mA current loop signal, making it ideal for integration with PLCs, DCS, and SCADA systems. With a measurement range of 0 to 50.8 mm/s (0 to 2.0 in/s) and a frequency response of 3 Hz to 1 kHz, it captures the critical vibration data that helps prevent unplanned downtime.

Key Features & Technical Specifications

• Measurement Range: 0 – 50.8 mm/s (0 – 2.0 in/s) peak
• Frequency Response: 3 Hz to 1 kHz (180 to 60 kcpm) ±10%
• Output Signal: 4-20 mA current loop (Pin A to Pin B)
• Sensitivity (Main Loop): 4 ± 0.3 mA equals 0.0 mm/s; 20 ± 2 mA equals full scale
• 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
• Connector: 3-pin MIL-C-5015, 316L stainless steel
• Mounting Hole: 1/4-28 UNF
• Weight: 131 g (4.62 oz) typical

This model also features a hermetically sealed sensor, 100% non-submerged relative humidity tolerance, and magnetic field sensitivity of less than 20 μm/s/gauss. These specs ensure dependable operation in challenging industrial settings.

Real-World Applications

The 177230-02-02-05 is designed for continuous vibration monitoring on rotating equipment such as pumps, motors, fans, and compressors. Its 4-20 mA output simplifies integration into existing control systems, allowing operators to track vibration trends and set alarms. For example, in a petrochemical plant, this transmitter can be mounted on a cooling tower fan to detect imbalance early, reducing repair costs. Additionally, its stainless steel construction and wide temperature range make it suitable for outdoor or washdown environments.

Installation & Setup

Mounting the 177230-02-02-05 is straightforward. Use the 1/4-28 UNF mounting hole and tighten to a torque of 4 to 7 N-m (35.4 to 62.0 in-lbf). The connector wiring convention is simple: Pin A carries the 4-20 mA positive loop, Pin B is the loop return, and Pin C provides an unbuffered dynamic acceleration signal. Ensure the excitation voltage is within 12 to 30 Vdc, and the current is limited to 40 mA. For best results, follow the manufacturer's installation guidelines and verify the mounting surface is clean and flat.

Maintenance & Reliability

Routine maintenance is minimal due to the rugged design. Periodically inspect the connector and cable for damage, and verify the sensor output is stable. The hermetically sealed case protects against moisture, and the 316L stainless steel resists corrosion. Because the transmitter has no moving parts, it offers long service life with minimal upkeep. Regular calibration checks, as recommended by Bently Nevada, ensure continued accuracy.

Compatibility & Integration

This transmitter is compatible with any PLC, DCS, or SCADA system that accepts a 4-20 mA input and provides a current-limited power supply (typically 30-35 mA). The output is proportional to peak vibration, making it easy to configure alarms and trend analysis. No special software is required—just connect the loop and scale the input. For dynamic signal analysis, Pin C provides an unfiltered acceleration signal that can be routed to a separate data collector.

Common Questions

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

A: The measurement range is 0 to 50.8 mm/s (0 to 2.0 in/s) peak.

Q: What power supply does this transmitter need?

A: It requires 12 to 30 Vdc excitation, with current limited to 40 mA.

Q: Can I use this transmitter in hazardous areas?

A: Yes, the 177230-02-02-05 has multiple approvals including CSA/NRTL/C and ATEX/IECEx, making it suitable for many hazardous locations.

Q: How do I connect the 4-20 mA loop?

A: Connect Pin A to the positive loop and Pin B to the loop return. The loop is powered by the control system's internal supply.

Q: What is the operating temperature range?

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

Support & Availability

The Bently Nevada 177230-02-02-05 is available through Petro Auto Tech. Contact our team for current pricing and lead times. We stock a wide range of industrial automation parts and can assist with technical inquiries.