Bently Nevada 176449-04

Technical Parameters

Product type                          3500/45 Position Monitor

Part number PN                     176449-04

Physical dimensions                241.3mm in height x 24.4mm in width x 241.8mm in depth (9.50in x 0.96in x 9.52in)

Weight                                  0.91kg / 2.0lbs

Input channels                       4 channels, supporting Proximitor®, RPT, DC LVDT, AC LVDT, TMR.

Typical power consumption      8.5 watts.

Front panel LED

OK LED                                 Indicates that the module is operating normally.

TX/RX LED                            Indicates that the module communicates normally with other modules in the 3500 rack.

Bypass LED                           Indicates that the module is in bypass mode.

Output

Buffer the original signal output         One front panel coaxial connector for each channel

4-20mA analog output                      One channel per channel, load capacity 0-600 Ω, voltage compliance range 0 to +12 Vdc.

Measurement performance

Accuracy                            Typical value ±0.33% full scale, maximum value ±1% full scale.

Frequency response            Direct filter-3 dB at 1.2 Hz; Gap filter-3 dB at 0.41 Hz. This low-pass filtering characteristic enables it to focus on slowly changing or static position signals, effectively filtering out high-frequency vibration noise.

Sensor power supply

Proximitor/RPT                        -24 Vdc

DC LVDT                                +15 Vdc

AC LVDT                                 2.3 Vrms, 3400 Hz sine wave

Rotary Potentiometer               -12.38 Vdc

Operating temperature            -30°C to +65°C.

Hazardous area certification     CSA/NRTL/C Class I, Div 2 Groups A, B, C, D T4.

Comparison of similar products

Advantages

With industry-leading accuracy and stability, a typical accuracy of ±0.33% and a filter optimized for low frequencies, it has become the gold standard for position monitoring of large rotating machinery. The long-term stability of 176449-04 ensures the validity of trend data and serves as the foundation for thermodynamic analysis and life prediction.

Unparalleled sensor compatibility. One module solves the connection problems of all displacement sensors, greatly simplifying spare parts management and system design. Engineers do not need to prepare different monitoring hardware for different types of sensors.

As part of the 3500 System, its data, alarm and status information are fully integrated into the System 1 software ecosystem, achieving seamless data flow from the site to the control room.

The built-in slope differential expansion and CIDE algorithm's professional support for complex applications have solved the worldwide problems in the monitoring of large steam turbines, which is incomparable to general-purpose modules.

Disadvantage

Compared with 3500/42M, 176449-04 has a single function and cannot measure vibration. On a bearing housing that needs to monitor both vibration and displacement simultaneously, it may be necessary to install 3500/42M and 3500/45 at the same time, which increases the cost and complexity.

As a highly specialized module, its cost is relatively high, with a unit price much higher than that of general-purpose I/O modules or simple LVDT transmitters.

It has a strong dependence on I/O modules. The 176449-04 is merely the main processing unit and must be paired with the correct I/O module to achieve specific sensor input and termination methods. Incorrect selection can lead to missing functions.

Locked in the System 1 ecosystem. The full value can only be fully reflected in the System 1 software suite of Bently Nevada.