Description
Bently Nevada 125840-02 Power Supply Module
The Bently Nevada 125840-02 is a high-performance power supply module designed specifically for the 3500 Machinery Protection System. This Power Supply is a half-height module that provides regulated DC power to the 3500 rack backplane, ensuring that all monitoring and communication modules receive stable energy for critical machinery protection tasks.
Product Introduction
The 125840-02 is the High Voltage AC/DC version of the 3500/15 power supply series. It is engineered to convert a wide range of input voltages into the specific levels required by the internal electronics of the 3500 rack. To ensure maximum system availability, the 3500 system supports the installation of two of these modules in a redundant configuration (placed in the upper and lower slots of the power supply bay), allowing for seamless power transition in the event of a single supply failure.
BENTLY 125840-02
Product Parameters (Datasheet)
| Parameter | Specification |
| Model Number | 125840-02 (High Voltage) |
| Input Voltage (AC) | 175 to 264 Vac (nominal 220 Vac) |
| Input Voltage (DC) | 120 to 375 Vdc |
| Input Frequency | 47 to 63 Hz (for AC input) |
| Output Voltage | Regulated DC for 3500 Backplane |
| Isolation | 2200 Vdc Input-to-Output |
| Redundancy | Full support for dual-redundant configuration |
| Operating Temp | -30°C to +65°C |
| Humidity | 95% non-condensing |
Country of Origin
- Origin: United States (USA)
Usage Instructions
- Installation: Slide the 125840-02 module into the dedicated power supply slot on the left side of the 3500 rack. Secure the module using the front-panel captive screws.
- Input Selection: Ensure that the corresponding Power Input Module (PIM) is installed in the rear of the rack to match the 125840-02 high voltage requirements.
- Wiring: Connect the primary power source to the PIM terminals. Use appropriate wire gauges and ferrules to ensure a low-resistance connection.
- Redundancy Setup: For a redundant system, install a second module in the adjacent supply slot. The rack logic automatically handles load sharing and failover.
- Status Monitoring: Verify the “Supply OK” LED on the front panel is green. If the LED is off or red, check the input fuse and input voltage levels immediately.
Product Q&A
- Q: Can I use the 125840-02 with a low-voltage 24V DC input?
- A: No. The 125840-02 is specifically for high-voltage ranges (175-264 Vac or 120-375 Vdc). For 24V DC applications, you must use the 125840-01 low-voltage variant.
- Q: Is this module hot-swappable?
- A: Yes. If the rack is equipped with redundant power supplies, one module can be removed and replaced without interrupting the operation of the protection system.
- Q: Does this module power the field sensors?
- A: Yes, the module provides power to the backplane, which in turn distributes power to the individual monitor modules that drive the Proximitor sensors and transducers.
Recommended Similar Models
- Bently Nevada 125840-01: Low-Voltage AC/DC Power Supply Module.
- Bently Nevada 3500/15-02-02-00: Complete High Voltage Power Supply assembly with PIM.
- Bently Nevada 106M1079-01: Modern universal AC/DC Power Supply for 3500 series.
- Bently Nevada 127610-01: High Voltage Power Input Module (PIM).
- Bently Nevada 125734-01: Standard 3500/15 I/O Module.
Documentation & Manuals
For detailed electrical diagrams and certification information (ATEX/CSA):
Download BENTLY 125840-02 MANUAL datasheet
