Bently Nevada 126648-01 Enhanced Keyphasor I/O Module 3500/25 - 2-Channel Input, -40°C to +85°C Operating Range
The 126648-01 Enhanced Keyphasor I/O Module is a factory-released component for Bently Nevada 3500/25 machinery protection systems, delivering precise timing signals for critical rotating equipment monitoring and protection.
This half-height, two-channel module converts once-per-turn or multiple-event pulses from rotating shafts into digital timing signals used throughout the 3500 rack system. The 126648-01 is 100% backward-compatible with legacy Keyphasor modules while providing enhanced signal processing and superior noise immunity.
- Shaft speed measurement and monitoring
- 1X vibration amplitude and phase vector calculation
- Accurate triggering of transient-data captures
- Hot-swap installation capability
- Improved noise immunity for reliable operation
| Parameter | Specification |
|---|---|
| Part Number | 126648-01 (Keyphasor I/O module for 3500/25) |
| Manufacturer | Bently Nevada |
| Channels | 2 |
| Input Types | Eddy-current proximity probe, magnetic pickup |
| Input Voltage | -21.0 V to +0.8 V (prox); >200 rpm (mag) |
| Output Signal | TTL-compatible digital Keyphasor pulse |
| Output Impedance | 50 Ω maximum |
| Update Rate | 1 per revolution or user-defined multi-event |
| Power Consumption | 3.2 W typical |
| Operating Temperature | -40 °C to +85 °C |
| Dimensions | 241 mm × 24 mm × 103 mm (9.50″ × 0.96″ × 4.06″) |
| Weight | 0.40 kg (0.88 lb) |
| Certifications | CE, ATEX, CSA, FM, SIL 2, API 670 |
- Steam, gas and hydro turbines
- Centrifugal and reciprocating compressors
- Motors, generators, pumps, and fans
- Any rotating asset requiring phase-referenced vibration analysis or overspeed protection
Designed for seamless integration into existing 3500 system chassis, this module supports hot-swap installation and maintains full compatibility with legacy systems while delivering enhanced performance for modern industrial applications.
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