Product Overview

The Bently Nevada 125840-01 is a High Voltage AC Power Input Module (PIM) designed exclusively for the 3500 Series Machinery Protection System. Functioning as the primary electrical gateway for the rack, this half-height module interfaces external high-voltage AC utility power with the internal 3500/15 power supply units. Engineered for mission-critical reliability, the 125840-01 ensures that the monitoring system receives stable, filtered power necessary for the continuous protection of high-value rotating assets like turbines, compressors, and generators.

The 3500 rack architecture supports a redundant power configuration, allowing for the installation of two separate power supplies and their respective input modules. The 125840-01 can operate as a standalone power source or in a secondary role as a hot-swappable backup. This redundancy ensures that if the primary utility line fails, the monitoring rack continues to operate without interruption, maintaining the safety integrity of the entire plant.

Technical Performance and Safety Features

The 125840-01 PIM is specifically rated for high-voltage environments, handling input ranges typically between 175 and 250 Vac RMS. A key design priority is equipment protection; the module features integrated safety circuitry where an overvoltage condition will trigger an internal fuse to open, effectively isolating the sensitive rack electronics from damaging surges. Conversely, the module is engineered to withstand undervoltage conditions without sustaining hardware damage, ensuring resilience during brownouts or fluctuating power grids.

Built for the extreme environments of the energy and process industries, the 125840-01 operates reliably in temperatures ranging from -30°C to +65°C. Its robust construction minimizes electrical noise and provides the high-integrity grounding required for precision vibration monitoring. The half-height form factor allows it to be installed in the dedicated power slots on the far left side of the 3500 rack, optimizing space for additional monitoring and relay modules.

Technical Specifications

• Model Identification: 3500/15

• Part Number: 125840-01

• Module Type: High Voltage AC Power Input Module (PIM)

• Input Voltage Range: 175 to 250 Vac RMS

• Form Factor: Half-height (Installed in left-side rack slots)

• Redundancy Support: Compatible with dual-power supply configurations

• Protection Mechanisms: Integrated overvoltage fuse protection

• Operating Temperature: -30°C to +65°C (-22°F to +150°F)

• Storage Temperature: -40°C to +85°C (-40°F to +185°F)

• Relative Humidity: 95% non-condensing

• Manufacturing Origin: USA (United States)

• Weight: 0.5kg

• Dimentions: 12 x 2.5 x 11 cm

Key Functional Advantages

• Redundant System Uptime: Supports "Hot-Standby" power configurations to prevent system-wide shutdowns during power loss.

• Surge Resilience: Onboard fuse protection safeguards internal 3500 modules from catastrophic voltage spikes.

• Versatile Integration: Capable of being paired with both AC and DC supplies within the same rack for diverse power source compatibility.

• Industrial Hardening: Designed to withstand the thermal and electrical stresses of power generation and oil and gas facilities.