BENTLY 3500/15 Power Supply – Compact, Cost-Effective Solution for Non-Redundant 3500 Installations

Description

Application Scenarios

At a mid-sized pulp and paper mill in Scandinavia, engineers needed to monitor bearing vibration on three aging steam turbines without the budget for a fully redundant system. They deployed BENTLY 3500 racks powered solely by BENTLY 3500/15 (106M1079-01) modules. Over four years of continuous operation—including winter blackouts and summer humidity spikes—not a single power-related fault occurred. The clean 24 VDC output ensured microvolt-level stability for proximity probes, enabling early detection of a developing shaft crack that prevented a catastrophic failure. This case proves that even in non-redundant configurations, the BENTLY 3500/15 delivers industrial-grade dependability where it matters most.

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Technical Principles and Innovative Values

Innovation Point 1: Ultra-Low Noise Design for Precision Analog Circuits

The BENTLY 3500/15 employs multi-stage filtering and linear post-regulation to minimize switching noise—critical for high-sensitivity modules like the 3500/42M vibration monitor, where power ripple could mask subtle fault frequencies.

Innovation Point 2: Universal Input for Global Deployment Without Reconfiguration

From 100 VAC in Japan to 240 VAC in Australia, the 3500/15 auto-adapts without jumpers or transformers, simplifying spares management and enabling rapid international deployment.

Innovation Point 3: Fanless, Solid-State Reliability

With no moving parts, the BENTLY 3500/15 eliminates a common failure point in industrial PSUs. Its convection-cooled design ensures silent, maintenance-free operation—even in dusty control rooms.

Innovation Point 4: Seamless Integration with 3500 Ecosystem

Though a single-supply unit, it communicates basic health status via the backplane to the 3500/20 Rack Interface Module, allowing centralized monitoring in System 1™ software—bridging simplicity with intelligence.

Application Cases and Industry Value

A hydroelectric plant in Canada retrofitted its generator bearing monitors using BENTLY 3500/15-powered racks due to space constraints in existing panels. Despite being located near high-current switchgear, the low-noise output prevented EMI-induced drift in radial position readings. Over five years, the system provided early warnings on two stator rub events—saving an estimated $ 2.3M in potential repair and downtime costs.

In another case, a sugar refinery in Brazil replaced obsolete PLC-based monitoring with a 3500 system using 3500/15 power supplies. During the rainy season, frequent voltage sags previously caused data gaps. The 3500/15’s wide input range maintained stable output through every event, ensuring uninterrupted condition monitoring during critical harvest operations.

Related Product Combination Solutions

BENTLY 3500/05: 8-slot rack—optimal host for a single 3500/15 power supply

BENTLY 3500/20: Rack Interface Module—enables communication and basic diagnostics from 3500/15

BENTLY 3500/42M: 4-channel vibration monitor—benefits from the 3500/15’s clean DC output

BENTLY 3500/32: Relay output module—commonly used with 3500/15 in alarm-only systems

BENTLY 3500/25: Dual redundant PSU—upgrade path when SIL or API 670 redundancy is later required

BENTLY 3500/15C: Conformal-coated version of 106M1079-01—for corrosive or humid environments

BENTLY 87199-01: Blank module—completes rack shielding when only one PSU is installed

BENTLY 3500/92: Communication gateway—relies on stable power from 3500/15 for Modbus or Ethernet output

Installation, Maintenance, and Full-Cycle Support

Install the BENTLY 3500/15 in the designated power slot of a 3500/05 or 3500/06 rack, connecting AC input via terminal block or IEC connector (depending on chassis version). Ensure proper grounding and avoid sharing the AC circuit with high-inrush loads like motors. For non-critical applications, a single unit suffices; for higher availability, consider future migration to 3500/25 redundancy.

Maintenance is minimal: inspect status LED quarterly (green = normal), and verify output voltage annually using the test points on the rack backplane. No calibration or firmware updates are needed. If failure occurs, replacement takes under 2 minutes—though field data shows MTBF exceeding 150.000 hours.

We supply both new and refurbished BENTLY 3500/15 (106M1079-01) units, each rigorously tested for output regulation, ripple, and thermal performance. All include compatibility verification for your specific 3500 chassis revision and come with a 12-month warranty.

Contact us for a customized solution—whether you’re modernizing legacy machinery monitoring or deploying a lean, reliable TSI system, the BENTLY 3500/15 delivers proven performance without unnecessary complexity.