Description
Product Core Brief
- Model: 3500/15 (Part: 127610-01)
- Brand: Bently Nevada
- Series: 3500 Machinery Protection System
- Core Function: Converts AC line voltage to internal DC power for the 3500 rack.
- Product Type: AC Power Supply Module
- Key Specs: High Voltage AC (175-264 Vac) | Redundant Capable | Hot-Swappable
- Condition: New Original (New Surplus)

BENTLY 3500/15 127610-01
Product Introduction
BENTLY 3500/15 127610-01 is a high-voltage AC Power Supply Module designed for the Bently Nevada 3500 Machinery Protection System. It provides the necessary internal DC power to operate all monitor, relay, and communication modules within the rack.
The 127610-01 is specifically configured for high-voltage AC input (typically 220V AC). It is installed in the leftmost power slots of the 3500 rack. For critical machinery protection, two of these modules can be installed (one in the upper slot as primary, one in the lower slot as backup) to provide redundant, hot-swappable power, ensuring zero downtime during maintenance or a single power failure.
Key Technical Specifications
- Module Type: AC Power Supply Module
- Input Voltage: 175 to 264 Vac rms (High Voltage AC)
- Frequency: 47 to 63 Hz
- Max Input Current: 2.3 A rms
- Indicators: Front panel “Power OK” LED
- Grounding: Single-point ground switch (Open/Closed)
- Protection: Over-voltage protection (blows internal PIM fuse)
- Compatibility: Requires High Voltage AC Power Input Module (PIM) 125840-01
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: Trace source via serial number. Inspect front panel and rear connectors for physical damage.
- Visual Inspection: Verify the single-point ground switch position and check internal fuse integrity.
- Live Functional Test: Apply 220 Vac to verify operation. Confirm “Power OK” LED illuminates and remains steady.
- Output Voltage Test: Measure backplane DC rail voltages to ensure they are within OEM tolerance.
- Final QC & Packaging: Seal in anti-static bag. Apply QC Passed label with date.

BENTLY 3500/15 127610-01
Replacement Pitfall Guide
❗ PIM Mismatch: The 127610-01 is the power module. It must be paired with the correct High Voltage AC Power Input Module (PIM), which is typically 125840-01. Do not mix with Low Voltage AC PIMs (125840-02) or Universal PIMs (106M1081-01).
❗ Redundancy Rules: If installing dual power supplies, both modules must be identical, and the single-point ground switches on both must be set to the exact same position (both OPEN or both CLOSED).
❗ Grounding Loops: The power module features a grounding switch. If the system is grounded elsewhere (e.g., via an external security ground), this switch MUST be set to OPENED to prevent ground loops.
❗ Over-Voltage Damage: While the module has over-voltage protection, a severe spike will blow the internal fuse to protect the rack. A blown fuse indicates a dead module requiring replacement.
❗ Hot-Swapping: Dual power supplies are designed for hot-swapping. Never remove the only power supply in a running rack without taking the system offline.
Keep these in mind and you’ll cut 90% of rework time.
Compatibility Matrix & Benchmarks
- 3500/15 127610-01 → 3500/15-02-02-00 : Direct — Standard dual high-voltage AC configuration
- 3500/15 127610-01 → 3500/15-02-00-00 : Direct — Single high-voltage AC configuration
- 3500/15 127610-01 → 106M1079-0 : Incompatible — Universal AC power module
Benchmarks:
- Power OK LED Response: < 2 seconds upon power-up
- Ground Switch Resistance: < 0.1 Ω (Closed), > 1 MΩ (Open)


