The 3500/42M-09-00 from Bently Nevada is a powerful monitoring module. It belongs to the 3500 series machinery protection system. This monitor handles up to four signal inputs simultaneously. Specifically, you can connect proximity probes, velocity sensors, or accelerometers.
Many applications require radial vibration monitoring. Additionally, this module measures thrust position, eccentricity, and differential expansion. It also supports REBAM (Rolling Element Bearing Monitor). For absolute shaft measurements, the Bently Nevada 3500/42M Proximitor Seismic Monitor delivers accurate data.
Front panel LEDs keep you informed. The OK LED shows proper operation. TX/RX LED indicates communication with other rack modules. Bypass LED lights when bypass mode is active. Each channel has a buffered transducer output on the front panel. These coaxial connectors are short-circuit protected.
The 3500/42M-09-00 uses I/O module type 09 (part number 128229-01). This is a Prox/Velom I/O module with internal terminations. Supported transducer types include Prox/Accel, Velomitor, or HTVS. Input impedance for standard I/O is 10 kΩ for Proximitor and acceleration inputs.
Typical power consumption is 7.7 watts. This makes the module efficient for dense 3500 racks.
The Bently Nevada 3500/42M Proximitor Seismic Monitor offers many sensitivity settings. For radial vibration, choose 3.94 mV/μm or 7.87 mV/μm. Thrust and eccentricity use the same two options. Differential expansion uses 0.394 mV/μm or 0.787 mV/μm.
REBAM sensitivity is much higher. You get 40 mV/μm or 80 mV/μm. Acceleration inputs use 10 mV per m/s² (100 mV/g). Velocity inputs offer three choices. These are 20, 5.8, or 4 mV per mm/s peak.
Shaft absolute measurements for radial vibration use 3.94 or 7.87 mV/μm. Shaft absolute velocity uses the same three velocity options.
Each channel gets a dedicated recorder output. Signal range is +4 to +20 mA. These values are proportional to monitor full scale. Load resistance can be 0 to 600 Ω. Voltage compliance ranges from 0 to +12 Vdc across the load.
Short circuits on recorder outputs do not affect monitor operation. Resolution is 0.3662 µA per bit. Error at room temperature is ±0.25%. Over the full temperature range, error stays within ±0.7%. Update rate is approximately 100 ms or less.
Every channel has one coaxial connector on the front panel. Output impedance is 550 Ω. Each connector is short-circuit protected. This allows safe connection to diagnostic tools.
Shaft Absolute I/O modules provide one output per channel group. Output impedance is 300 Ω. Each output is also short-circuit protected.
The direct filter is user-programmable. You can select single-pole -3 dB at 4 Hz to 4000 Hz. Alternatively, choose 1 Hz to 600 Hz with ±1% accuracy. The gap filter is -3 dB at 0.09 Hz.
Not 1X filter ranges from 60 cpm to 15.8 times running speed. Minimum rejection in the stopband is -34.9 dB. Smax covers 0.125 to 15.8 times running speed. The 1X and 2X vector filters use constant Q design. Minimum rejection is -57.7 dB in the stopband.
Accuracy for direct and gap measurements is within ±0.33% of full scale typical. Maximum error is ±1%. Smax accuracy is within ±5% maximum. Not 1X accuracy is ±3% for speeds below 30,000 cpm. Above 30,000 cpm, it is ±8.5%.
Accuracy is typically within ±0.33% of full scale. Maximum error is ±1%. Direct filter is -3 dB at 1.2 Hz. Gap filter is -3 dB at 0.41 Hz.
Same accuracy applies. Direct filter is -3 dB at 15.6 Hz. Gap filter is -3 dB at 0.41 Hz.
Accuracy is within ±0.33% of full scale typical. Maximum error is ±1%, exclusive of filters. Both high-pass and low-pass filters are 4-pole. This means 80 dB per decade (24 dB per octave).
For Acceleration II, the bias filter is -3 dB at 0.01 Hz. Not OK filter is -3 dB at 2400 Hz. The 1X and 2X vector filters work for machine speeds from 60 cpm to 100,000 cpm.
Height is 241.3 mm (9.50 in). Width is 24.4 mm (0.96 in). Depth is 241.8 mm (9.52 in). The 3500/42M-09-00 weighs 0.91 kg (2.0 lb).
Operating temperature ranges from -30°C to +65°C (-22°F to +150°F). Storage temperature ranges from -40°C to +85°C (-40°F to +185°F). Humidity can reach 95% non-condensing.
Mount the Bently Nevada 3500/42M Proximitor Seismic Monitor in any 3500 rack slot. Ensure the rack backplane provides proper power and communication. The front panel LEDs will indicate status after power-up. Use the coaxial connectors for buffered outputs. Connect recorder outputs to your monitoring system.
3500/42M-09-00 Proximitor Seismic Monitor module (main board) – 1 unit
Original factory anti-static packaging – 1 set
No certificates or warranty documents included
All items ship via FedEx, UPS, or DHL. Products are new and original. Factory packing ensures safe delivery.
1. What transducer types work with the 3500/42M-09-00?
It works with Proximitor probes, accelerometers, Velomitor sensors, and HTVS transducers. The I/O module type 09 supports all these options.
2. Can I measure both vibration and thrust with one module?
Yes, absolutely. The Bently Nevada 3500/42M Proximitor Seismic Monitor handles radial vibration, thrust, eccentricity, differential expansion, REBAM, acceleration, and velocity. You just configure each channel as needed.
3. Are the recorder outputs short-circuit protected?
Yes, they are. Monitor operation remains unaffected by short circuits on recorder outputs. This protects your system during maintenance.
4. What is the update rate for all channels?
The update rate is approximately 100 ms or less. This ensures timely data for machinery protection.
5. Does this module require specific firmware versions?
Yes, you need 3500 Configuration Software 2.41 or greater. The 3500/20 RIM firmware should be rev. G or later. Check your system compatibility before installation.
| Brand Name | Bently Nevada |
| Model No. | 3500/42M-09-00 |
| Product Type | Proximitor Seismic Monitor |
| hasMerchantReturnPolicy | Adjust according to reality |
| Shippingdetails | Adjust according to reality |
