The Bently Nevada 128229-01 is the Proximitor/Seismicwith 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 :
128229-01Order(MOQ) :
1 PiecePayment :
EXW/CIFProduct Origin :
USAShipping Port :
WuhanLead Time :
3-5daysWeight :
3kg| Specification | Description |
|---|---|
| Manufacturer | Bently Nevada (Baker Hughes) |
| Model | 128229-01 |
| Product Family | 3500/42M Proximitor/Seismic Monitor |
| Product Type | Proximitor/Seismic I/O Module (Internal Terminations) |
| Compatible Monitor | 3500/42M Monitor (main card 176449-02) |
| Number of Channels | 4 non-isolated transducer input channels |
| Supported Sensors | Proximity probes, accelerometers, Velomitor, Seismoprobe |
| Transducer Excitation | -24 VDC power supply provided by the monitor |
| Input Impedance | 10 kΩ per channel |
| Termination Type | Internal Terminations (built-in terminal blocks) |
| Output Voltage | 0 to +12 VDC |
| Power Consumption | 7.7 W typical |
| Isolation | 500 Vrms galvanic isolation to prevent ground loops |
| Operating Temperature | -30°C to +65°C (-22°F to +150°F) |
| Storage Temperature | -40°C to +85°C |
| Humidity | 95%, 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) for non-barrier version |
| Rack Space | 1 full-height rear slot |
| Country of Origin | USA |
| Lifecycle Status | Active / Available as New Surplus |
| Model | Description | Typical Application |
|---|---|---|
| 128229-01 (this model) | Proximitor/Seismic I/O Module with Internal Terminations | Standard 3500/42M monitoring with internal rack wiring |
| 128240-01 | Proximitor/Seismic I/O Module with External Terminations | Applications requiring external wiring access |
| 135489-01 | I/O Module with Internal Barriers + Internal Terminations (4x Prox/Accel) | Hazardous area (intrinsically safe) applications |
| 135489-02 | I/O Module with Internal Barriers (2x Prox/Accel + 2x Velomitor) | Mixed sensor applications in hazardous areas |
| 140471-01 | Prox/Velom I/O Module with Internal Terminations | Prox/Accel/Velomitor applications |
| 176449-02 | 3500/42M Proximitor/Seismic Monitor (main card) | Companion front card for the 128229-01 |
Q1: What is the primary function of the 128229-01?
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 and seismic transducers 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, acceleration, velocity, eccentricity, and REBAM.
Q2: What is the difference between 128229-01 and 128240-01?
The primary difference is the termination method. The 128229-01 uses Internal Terminations — field wiring connects directly to built-in terminal blocks on the module. The 128240-01 uses External Terminations — field wiring connects to separate external termination blocks, with a cable linking to the I/O module.
Q3: Does the 128229-01 include the front-facing monitor card?
No. The 128229-01 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: Can the 128229-01 accept signals from Keyphasor transducers?
No. Keyphasor signals require a dedicated 3500/25 Keyphasor module and its associated I/O. The 128229-01 is designed for proximity and seismic transducer inputs only .
Q5: Is the 128229-01 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.
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