The Bently Nevada 140471-01 is a Prox/Velom I/O Module with Internal Terminations for the 3500/42M Proximitor/Seismic Monitor in the 3500 Machinery Protection System. It is a full-height rear I/O card that serves as the hardware interface between field-mounted proximity probes, accelerometers, and Velomitor sensors and the front-facing 3500/42M monitor module.
Item No :
140471-01Order(MOQ) :
1 PiecePayment :
EXW/CIFProduct Origin :
USAShipping Port :
WuhanLead Time :
3-5daysWeight :
3kg| Specification | Description |
|---|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Model | 140471-01 |
| Product Family | 3500/42M Proximitor/Seismic Monitor |
| Product Type | Prox/Velom I/O Module (Internal Terminations) |
| Compatible Monitor | 3500/42M Monitor (main card 176449-02) |
| Number of Channels | 4 independent input channels |
| Supported Sensors | Proximity probes (eddy current), Velomitor (velocity), accelerometers (seismic) |
| Probe Excitation | -24 VDC, 4–20 mA |
| Input Impedance | 10 kΩ |
| Gap Voltage Range | -2 V to -18 VDC |
| Frequency Response | 0.5 Hz to 10 kHz |
| Measurement Functions | Radial vibration, thrust position, differential expansion, eccentricity, REBAM, acceleration, velocity, shaft absolute |
| Termination Type | Internal Terminations (built-in screw terminal blocks) |
| Power Consumption | 7.7 W typical (3500/42M assembly) |
| Operating Temperature | -30°C to +65°C (-22°F to +150°F) |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5–95% RH non-condensing |
| Dimensions (H x W x D) | 241.3 mm x 24.4 mm x 99.1 mm |
| Weight | Approx. 0.20 kg (0.44 lb) |
| Rack Space | 1 full-height rear slot |
| Country of Origin | USA |
| Lifecycle Status | Discontinued / Legacy – New Surplus and refurbished stock available |
| Model | Description | Typical Application |
|---|---|---|
| 140471-01 (this model) | Prox/Velom I/O Module with Internal Terminations | Standard 3500/42M monitoring with internal rack wiring |
| 128229-01 | Prox/Seismic I/O Module with Internal Terminations | Alternative I/O for standard proximity/seismic inputs |
| 140482-01 | Prox/Velom I/O Module with External Terminations | Applications requiring external wiring access |
| 135489-04 | Prox I/O Module with Internal Barriers | Hazardous area (intrinsically safe) applications |
| 176449-02 | 3500/42M Proximitor/Seismic Monitor (main card) | Companion front card for the 140471-01 |
| 3500/42M-09-00 | Complete Prox/Velom Monitor assembly | Standard vibration monitoring configuration |
Q1: What is the primary function of the 140471-01?
It is the rear I/O module for the 3500/42M Proximitor/Seismic Monitor. It serves as the direct hardware interface linking external proximity probes, Velomitor sensors, and accelerometers to the front-facing monitor. It provides stable sensor power excitation, receives raw analog signals, and channels these signals through the backplane to the main processor card for computation of machinery metrics like radial vibration, thrust position, eccentricity, and REBAM.
Q2: What is the difference between 140471-01 and 128229-01?
The 140471-01 is the Prox/Velom I/O Module optimized for Prox/Accel/Velomitor sensor combinations. The 128229-01 is the Prox/Seismic I/O Module designed for standard proximity and seismic (velocity/acceleration) inputs. Both are internal termination modules but have different input circuit configurations.
Q3: Does the 140471-01 include the front-facing monitor card?
No. The 140471-01 is the rear I/O module only. A complete monitoring channel requires the compatible 3500/42M monitor card (176449-02) for signal processing and alarm functions.
Q4: Is the 140471-01 hot-swappable?
Yes, but with precautions. Before pulling or inserting the module, activate the Rack Bypass switch or manually bypass the corresponding alarm relays in the configuration software. This prevents temporary switching transients from accidentally tripping machinery during the swap.
Q5: Is the 140471-01 still available?
It is available as New Surplus only. The module is discontinued (Legacy/EOL) and no longer manufactured by Bently Nevada. It is available through aftermarket suppliers as new surplus or refurbished stock. Due to limited availability, maintaining at least one spare per critical monitoring channel is strongly recommended.
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