Product Core Brief
- Model: 125840-01
- Brand: BENTLY NEVADA
- Series: 3500/15
- Core Function: Converts high voltage AC input to regulated 24 VDC for 3500 rack modules.
- Product Type: Power Supply Module
- Key Specs: 100-240 VAC Input | 24 VDC Output | Half-Height Form Factor
- Condition: New Original / New Surplus
Bently Nevada 125840-01
Product Introduction
BENTLY 125840-01 is a 3500/15 high voltage AC power supply for mechanical protection systems. It accepts wide-range AC input and delivers stable 24 VDC to the entire 3500 rack.
This industrial automation unit supports redundant operation when paired with a second supply. It maintains regulation from -30°C to +65°C without derating.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Input Voltage | 100-240 VAC or 200-480 VAC |
| Input Frequency | 47-63 Hz |
| Output Voltage | 24 VDC Regulated |
| Form Factor | Half-Height Module |
| Mounting Position | Left Side of 3500 Rack |
| Redundancy | Hot-Swappable (Dual Supply) |
| Operating Temp | -30°C to +65°C |
| Storage Temp | -40°C to +85°C |
| Humidity | 95% Non-Condensing |
| Protection | Over-Voltage, Over-Current, Short Circuit |
Quality Control Process
We validate every BENTLY 125840-01 before shipment. First, we perform a full load-bank test at 24 VDC to verify current delivery and thermal stability. Voltage ripple must stay under 50 mV peak-to-peak.
Next, we simulate input brownouts and surges to confirm protection circuits trigger correctly. We also verify hot-swap functionality by removing and reinserting the module under full rack load.
Finally, each replacement module ships in anti-static shielding with desiccant. This prevents moisture damage during transit.
Replacement Pitfall Guide
❗ Slot Position Matters: This half-height module MUST install in the left-side designated slots. Lower slot = primary; upper slot = backup. Reversing them breaks redundancy logic.
❗ Input Voltage Selection: Verify your site voltage matches the module’s rating. Applying 480 VAC to a 100-240 VAC unit destroys the input rectifier instantly. Check the label before energizing.
❗ Hot-Swap Procedure: Never remove the primary supply without a backup installed. Single-supply removal under load causes a full rack reset and potential machine trip.
❗ Backplane Power Draw: Ensure total rack consumption doesn’t exceed the single-supply rating. Overloading triggers over-current protection and shuts down the entire 3500 system.
Keep these in mind and you’ll cut 90% of rework time.
BENTLY 1258BENTLY 125840-0140-01
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| 125840-01 | 3500/15-05-05-00 | Direct | Current production equivalent |
| 125840-01 | 127610-01 | Needs Adaptation | Different input voltage rating |
| 125840-01 | 3500/15-02-02-00 | Direct | Legacy version; verify firmware |
- Conversion Efficiency: >85% at full load
- Hold-Up Time: >10 ms at rated load
