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Description：

The Bently NevadaTM 3500/25 Enhanced Keyphasor Module isa half-height, two-channel module used to provideKeyphasor signals to the monitor modules in a 3500 rack. Themodule receives input signals from proximity probes ormagnetic pickups and converts the signals to digitalKeyphasor signals that indicate when the Keyphasor mark onthe shaft coincides with the Keyphasor transducer. The 3500Machinery Protection System can accept up to fourKeyphasor signals for normal configuration and up to eightKeyphasor signals in a paired configuration.

When a system Keyphasor input is required for Triple ModularRedundant (TMR) applications, the 3500 system shouldemploy two Keyphasor modules. In this configuration, themodules work in parallel to provide both a primary andsecondary Keyphasor signal to the other modules in the rack.

Specification：

Frequently asked questions

Q1: What is the Bently Nevada 3500/25 Enhanced Keyphasor Module?

A1: It is a module used in the 3500 monitoring system to provide accurate shaft rotational position and speed reference signals for vibration analysis and machinery protection.

Q2: What is the typical power consumption?

A2: The 3500/25 module consumes approximately 3.2 watts during operation.

Q3: What is the 3500/25 minimum input impedance?

A3: The 3500/25 minimum input impedance is 21.8 kΩ, ensuring proper signal acquisition from connected sensors.

Q4: What is the 3500/25 149369-01 maximum buffered output impedance?

A4: The 3500/25 149369-01 maximum buffered output impedance is 504 Ω, supporting stable signal output to connected systems.

Q5: What is the 3500/25 main function of this Keyphasor module?

A5: It generates a timing reference signal (once-per-revolution or multiple events per revolution) used for phase measurement, speed monitoring, and vibration diagnostics.

Product Applications

Petroleum and Petrochemical Industry: Petroleum refining and petrochemical equipment, large oil pumps.

Chemical Industry: Compressor units for large-scale fertilizer and ethylene production.

Power Industry: Steam turbine generator sets for thermal power plants, hydroelectric turbine units for hydropower plants.

Metallurgy and Iron & Steel: Blast furnace blowers, oxygen station units.

Other Industries: Large water pumps, fans, coal mills, gearboxes, motors.