The 3500/15 (125840-02) is a specialized Low Voltage AC Power Input Module (PIM) designed for the Bently Nevada 3500 Machinery Protection System. This rear-mounted module serves as the primary interface for AC power entry, providing essential filtering and surge suppression before routing power to the front-facing 3500/15 power supply modules. It is engineered to maintain a stable power backbone for the entire rack, ensuring that critical monitoring modules receive consistent, noise-free energy.
While designated as a "Low Voltage" PIM, the 3500/15 (125840-02) is built to accommodate a wide operational window, specifically optimized for standard 110V AC grids while remaining resilient against voltage fluctuations. Its half-height design allows for the implementation of redundant power feeds within a single rack slot, which is vital for high-availability industrial assets where a power failure could lead to unmonitored machinery states.
The following specifications detail the electrical performance and environmental standards of the 125840-02 module:
Manufacturer: Bently Nevada (Baker Hughes)
Model Number: 3500/15
Part Number: 125840-02
Product Type: Low Voltage AC Power Input Module (PIM)
Input Voltage Range: 85–264 V AC RMS (Nominal 110–220 V AC)
Peak Input Voltage: Up to 373 V AC Peak
Input Frequency: 47–63 Hz
Power Consumption: < 1 W (Self-consumption of the PIM interface)
Redundancy Support: Compatible with dual-redundant power supply configurations
Communication Interface: Optional RS-485 for remote rack diagnostics
Mounting: Rear-facing, designated power supply slots in 3500/05 rack
Operating Temperature: -30 °C to +65 °C (-22 °F to +150 °F)
Storage Temperature: -40 °C to +85 °C (-40 °F to +185 °F)
Humidity: 95% Non-condensing
Dimensions: Standard Bently Nevada half-height PIM form factor
Voltage Stability: Efficiently handles AC input to ensure downstream monitor modules operate without rebooting during minor grid sags.
Space-Efficient Design: The half-height footprint allows for two PIMs to be installed in a single slot area, facilitating redundant AC/AC or AC/DC source inputs.
Diagnostic Integration: When equipped with the optional RS-485 interface, the PIM can transmit health status to the Rack Interface Module (RIM) for remote monitoring.
Industrial Hardening: Designed to meet stringent EMI/RFI standards, preventing electrical noise from the factory floor from interfering with sensitive vibration measurements.
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