Product Core Brief
- Model: 135473-01
- Brand: BENTLY NEVADA
- Series: 3500/25
- Core Function: Tracks shaft speed and phase angle for rotating machinery protection.
- Product Type: Keyphasor I/O Module
- Key Specs: 3500 Series Rack | 24 VDC / 120 VAC | API 670 Compliant
- Condition: New Original / New Surplus
Bently Nevada 135473-01
Product Introduction
BENTLY 135473-01 is a 3500/25 Keyphasor I/O module for mechanical protection systems. It accepts proximity probe signals to extract precise speed, direction, and phase reference data.
This industrial automation unit integrates directly into the 3500 rack backplane. It supports hot-swapping and redundant configurations to prevent false machinery trips during critical operations.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Module Type | 3500/25 Keyphasor I/O |
| Input Signal | Proximity Probe (Eddy Current) |
| Operating Voltage | 24 VDC / 120 VAC |
| Output Frequency Range | 50-60 Hz (Standard) |
| Mounting | 3500 Series Backplane |
| Hot-Swap Capability | Yes |
| Redundancy Support | Yes (Hot/Cold Backup) |
| Compliance Standard | API 670 |
| Operating Temp | -30°C to +65°C |
| Degraded Operation | Manual Override Supported |
Quality Control Process
We validate every BENTLY 135473-01 before it leaves our facility. First, we perform a signal injection test using a calibrated waveform generator to verify phase angle accuracy.
Next, we simulate a redundant failover scenario to ensure seamless switching between primary and backup modules. We also verify the internal diagnostic circuitry triggers correctly under fault conditions.
Finally, each replacement module ships in anti-static shielding with desiccant packs. This prevents moisture ingress during transit.
Replacement Pitfall Guide
❗ Backplane Slot Assignment: Keyphasor modules have specific slot requirements in the 3500 rack. Installing this unit in a standard vibration monitor slot will cause a backplane communication fault.
❗ Signal Wiring Polarity: Eddy current probe inputs are sensitive to shield grounding. Ground the shield at the module end only to prevent ground loops that corrupt the phase reference signal.
❗ Redundancy Configuration: If running dual modules, verify the DIP switch settings match your hot-backup or cold-backup strategy. Mismatched settings cause the system to flag inconsistent results and trigger alarms.
❗ Degraded Mode Awareness: Understand the manual override capabilities. If the module fails, know exactly which machinery operations can safely continue in degraded mode before replacing the unit.
Keep these in mind and you’ll cut 90% of rework time.
Bently Nevada 135473-01
Compatibility Matrix & Benchmarks
| Original Model | Replacement / Successor Model | Compatibility Level | Migration Notes |
|---|---|---|---|
| 135473-01 | 3500/25-01-03-02 | Direct | Current production equivalent |
| 135473-01 | 3500/25-01-01-00 | Direct | Legacy revision; verify firmware |
| 135473-01 | 3500/25-02-00-00 | Needs Adaptation | Dual-channel version; config change |
- Phase Angle Accuracy: ±1° across operating range
- Failover Time: < 50ms in hot-backup mode
