BENTLY 3500-70 125720-01 Proximity Power Supply Module

The BENTLY 3500-70 125720-01 isn’t just another power supply—it’s the backbone of reliable vibration monitoring systems in harsh industrial environments. Designed to power proximity sensors critical for turbine and rotating machinery protection, this module ensures uninterrupted data collection even when voltage fluctuations or extreme temperatures strike.

When a power plant in Texas experienced frequent sensor failures due to unstable grid voltage, technicians replaced their legacy power supplies with this 3500-70 module. The result? Vibration monitoring system uptime increased from 82% to 99.6% within three months. This module’s wide input range (180-260V AC) and built-in surge protection make it ideal for oil refineries, steel mills, and other environments where power quality fluctuates. It pairs seamlessly with Bently’s 3500 series rack systems, but also integrates with third-party monitoring setups through standard 24V DC output compatibility.

What sets this module apart isn’t just its specs—it’s the engineering behind them. The dual-layer PCB shielding reduces electromagnetic interference by 40% compared to standard modules, while the convection-cooled aluminum housing handles temperatures from -20°C to +70°C without fan assistance. Maintenance crews appreciate the front-panel LED indicators showing power status and load conditions at a glance. One engineer noted, “We swapped out a failed module during a turbine’s full-speed operation in under 90 seconds—no system shutdown required.” This hot-swappable design, combined with 2,500V galvanic isolation between input and output, means fewer production interruptions and lower long-term costs.