Description
Product Core Brief
- Model: 3500/25-01-01-00 (PWA: 149369-01 + 125800-01)
- Brand: BENTLY NEVADA
- Series: 3500 Machinery Protection System
- Core Function: Converts proximity/magnetic sensor signals into digital keyphasor timing pulses.
- Product Type: Enhanced Keyphasor Module
- Key Specs: Half-Height | Dual Channel | Internal Terminals | Non-Isolated I/O
- Condition: New Original (New Surplus)
BENTLY 3500/25-01-01-00
Product Introduction
The BENTLY 3500/25-01-01-00 is an Enhanced Keyphasor Module designed for the 3500 Machinery Protection System. It acts as a half-height, dual-channel module that receives input signals from eddy current (proximity) or electromagnetic (magnetic pickup) sensors. It converts these raw signals into precise digital keyphasor pulses, indicating the exact moment a keyway or gear tooth passes the sensor.
This timing reference is critical for 3500 monitor modules and external diagnostic equipment to measure vector parameters such as 1X amplitude, phase angle, and shaft speed. The specific part number 3500/25-01-01-00 breaks down as follows:
- 01: Dual Channel (2 channels per half-height module)
- 01: Non-Isolated I/O Module with Internal Terminals (PWA 125800-01)
- 00: No specific agency approvals (Standard)
This module is built on the enhanced PWA board149369-01and can be directly inserted into existing 3500 racks.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | Enhanced Keyphasor (Dual Channel) |
| Complete Part Number | 3500/25-01-01-00 |
| Front PWA Board | 149369-01 (Enhanced Keyphasor) |
| Rear I/O Board | 125800-01 (Non-Isolated, Internal Terminals) |
| Input Sensors | Eddy Current / Electromagnetic (Magnetic Pickup) |
| Input Signal Range | -0.8 V to -21.0 V (Non-Isolated) |
| Trigger Min Amplitude | 2 V p-p (Auto Threshold) |
| Power Consumption | 3.2 Watts (Typical) |
| Installation | Half-Height Front Slot |
| Compliance | API 670 |
Quality Control Process (Engineer’s Perspective)
- Incoming Verification: We check source traceability and verify serial numbers against anti-counterfeit databases. Visual inspection confirms no physical damage, bent pins, or connector corrosion.
- Live Functional Test: Power-on self-checks validate basic operation. We run continuous load tests exceeding 24 hours with temperature logging to ensure stability.
- Electrical Parameter Test: Insulation resistance is verified using a 500 V Megger, requiring >10 MΩ. Ground continuity is also strictly checked.
- Firmware Verification: We read and record internal firmware versions. DIP switch and jumper settings are photographed for future reference.
- Final QC & Packaging: The unit is sealed in an anti-static bag. A QC Passed label with the inspection date is applied before shipping.
Replacement Pitfall Guide
❗ I/O Board Mismatch: The -01- suffix indicates a Non-Isolated I/O module with Internal Terminals (125800-01). If your application requires an isolated I/O board, you must order the -04- variant (125800-02).
❗ Terminal Type Confusion: The second -01- indicates Internal Terminals. If your panel requires external wiring connections, you must select the -02- variant (126648-01 for non-isolated external terminals).
❗ TMR Redundancy Requirements: If your system utilizes Triple Modular Redundancy (TMR) and requires a system-wide keyphasor input, you must install two keyphasor modules. They operate in parallel to provide primary and secondary keyphasor signals to the rest of the rack.
❗ Magnetic Pickup RPM Limit: If using passive electromagnetic sensors, ensure the machine’s minimum operating speed exceeds 200 RPM (3.3 Hz), as these sensors cannot generate sufficient voltage below this threshold.
❗ ESD Damage: Use an anti-static mat during installation. Dry environments significantly increase electrostatic discharge risks to sensitive electronics.
Keep these in mind and you’ll cut 90% of rework time.
BENTLY 3500/25-01-01-00
Compatibility Matrix & Benchmarks
- 3500/25-01-01-00 → 3500/25-01-04-00 : Needs Adaptation — Non-Isolated vs. Isolated I/O Module
- 3500/25-01-01-00 → 3500/25-01-02-00 : Needs Adaptation — Internal Terminals vs. External Terminals
- 3500/25-01-01-00 → 3500/25-01-01-CN : Direct — Standard vs. CN Regional Approval
- Max Keyphasors per Rack: Up to 4 standard signals (or 8 in paired configuration)
- Companion Modules: 3500/40M / 3500/42M (M-Series Monitors utilizing keyphasor for vector analysis)
Need the matching 125800-01 I/O backplane replacement, or upgrading your entire 3500/05 rack infrastructure? I can verify the exact wiring and phase-drift requirements for your turbine or compressor.
