Description
Bently 125840-02 Power supply interface module
Product Dimensions:
1. Product Description
The 125840-02 is a half-height module that installs in the back of the 3500 rack, directly behind the main power supply module. In a 3500 system, power supplies are responsible for converting incoming utility power into the regulated DC voltages required by the monitoring and protection modules in the rack. The 125840-02 is the “input” side of this equation for low-voltage AC applications.
2. Product Specifications
| Parameter | Details |
| Model | Bently Nevada 3500/15 (125840-02) |
| Module Type | Low Voltage AC Power Input Module (PIM) |
| Input Voltage | 110 Vac nominal (Range: 85 to 132 Vac rms) |
| Input Frequency | 47 to 63 Hz |
| Max Current Draw | 4.5 A rms (maximum) |
| Dimensions | 120.7 mm x 25.4 mm x 114.3 mm (4.75 in x 1.0 in x 4.5 in) |
| Weight | Approx. 0.34 kg (0.75 lb) |
| Operating Temp | -30 °C to +65 °C (-22 °F to +150 °F) |
| Storage Temp | -40 °C to +85 °C (-40 °F to +185 °F) |
3. Product Advantages
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Redundancy Support: The 3500 rack can accommodate two power supplies. If two 125840-02 modules are used with corresponding power supplies, the system provides full power redundancy. The lower supply acts as primary and the upper as backup.
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Hot-Swappable: In a redundant configuration, the PIM or power supply can be replaced without disrupting the operation of the monitoring system.
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Robust Protection: Includes built-in filters to handle electromagnetic interference (EMI) and fuses to protect against over-voltage conditions.
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Space Efficient: Its half-height design allows the rack to maintain a compact footprint while offering high reliability.
4. Important Considerations (Precautions)
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Voltage Compatibility: The 125840-02 is strictly for Low Voltage AC (85-132 Vac). Do not connect High Voltage AC (220V) to this module, as it will blow the internal fuse and potentially damage equipment.
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Fuse Replacement: If the “Supply OK” LED on the front power supply module is off, check the fuse on the 125840-02 PIM. Use only the specified replacement fuse (typically 01720025).
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Slot Placement: Must be installed in the designated power supply slots on the far left side of the 3500 rack (rear side).
5. Product Applications
The 125840-02 is used wherever a Bently Nevada 3500 Machinery Protection System is deployed in environments with 110V AC power, including:
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Oil & Gas: Monitoring turbines, compressors, and pumps in refineries.
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Power Generation: Protection for steam/gas turbines and generators.
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Manufacturing: Vibration monitoring for large motors and fans.
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Water Treatment: Ensuring the health of large-scale pumping stations.
Payment: Bank of Chicago, Bank of Singapore
Express cooperation: fedex, DHL, UPS and your express account
Service: Professional Sales provides 24 hours /7 days online service
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