Description
Bently Nevada 3500/02 129132-01 Keyphasor Module
Configured for phase reference generation in 3500 Machinery Protection System, the Bently Nevada 3500/02 129132-01 (3500/02 Keyphasor Module) provides direct physical conversion of transducer-derived shaft position signals into a TTL-compatible pulse train used for vibration and rotational speed synchronization across rack-based monitoring channels.
Hardware Specifications
| Parameter |
Specification |
| Model |
3500/02 |
| Part Number |
129132-01 |
| Brand |
Bently Nevada |
| Origin |
USA |
| Weight |
0.8 kg |
| Operating Temp |
-20 deg C to +65 deg C |
| Power Consumption |
Not specified in provided data |
| Channels |
2 independent channels |
| Input Types |
Proximity probes, magnetic pickups |
| Output |
TTL digital pulse train |
| Rack Compatibility |
3500/05 System Rack |
| Compliance |
API 670 machinery protection |
Bently Nevada Keyphasor Signal Processing & Phase Reference Architecture
Within Bently Nevada 3500 system architecture, the Keyphasor module defines a deterministic phase reference layer used by vibration, orbit, and synchronous averaging algorithms. The module converts analog transducer signals into a structured pulse train aligned with shaft angular position.
In operation, eddy-current probe scaling and transducer gap voltage behavior are indirectly interpreted through pulse timing stability. The resulting phase marker stream is used by downstream monitoring modules to correlate vibration vectors with rotor angular displacement. Cross-channel alignment between dual inputs enables redundant phase acquisition or dual-shaft monitoring configurations.
Frequently Asked Questions (FAQ)
Q: Can the 3500/02 operate without a Keyphasor probe input?
A: No. The module requires a valid proximity probe or magnetic pickup input to generate a phase reference pulse train.
Q: Are both channels required for operation?
A: No. Each channel operates independently. One or two channels may be used depending on redundancy or machine configuration.
Q: Does the module output analog signals?
A: No. The output is a TTL-compatible digital pulse train representing shaft rotational position.
Field Installation Guidelines
-
Install module into a valid slot of the 3500/05 system rack before applying power.
-
Ensure Keyphasor probe wiring is routed separately from high-noise power conductors.
-
Maintain correct shielding termination at designated rack ground points to avoid signal distortion.
-
Verify probe gap and alignment before commissioning to ensure stable pulse generation.
-
Use only compatible Bently Nevada proximity probes or approved magnetic pickups.
-
Confirm channel configuration in system software prior to enabling vibration measurement functions.
