The Bently Nevada 3500/25 125792-01 is an Enhanced Keyphasor Module designed for the 3500 Machinery Protection System. This module serves as the primary interface for Keyphasor transducers, providing essential phase reference signals to the monitoring system. It receives input signals from proximity probes or magnetic pickups and converts them into digital Keyphasor signals, which are used by other modules in the rack for phase-related measurements such as 1X vibration, phase angle, and speed.
Features
Provides phase reference signals for machinery protection and condition monitoring.
Supports both proximity probe and magnetic pickup (MPU) inputs.
Enhanced processing capabilities for high-speed signal acquisition.
Configurable input thresholds to accommodate various transducer types.
Integrates seamlessly into the 3500 rack architecture via the backplane.
Technical Specifications
Product Model
3500/25 125792-01
Power Consumption
3.2 Watts typical
Input Impedance
21.8 kOhm minimum
Proximity Input Range
-2V to -18V
MPU Input Range
5 mV to 50 V peak
Speed Range
1 RPM to 99,999 RPM
Accuracy
+/- 0.1% of reading
Operating Temperature
-30 degC to +65 degC (-22 degF to +149 degF)
Isolation
500 V channel-to-ground
Power Supply
15 to 30 VDC
Installation Guidelines
Ensure the 3500 rack is powered down before inserting or removing the module to prevent electrical damage.
The module should be seated firmly in the designated rack slot and secured using the front panel levers.
Use shielded cabling for all transducer inputs to minimize electromagnetic interference (EMI).
Ensure proper grounding of the 3500 rack chassis to a common instrument ground.
Handle the module using ESD-safe practices to protect internal circuitry.
Verify that the Keyphasor transducer gap and signal levels are within the specified input ranges during commissioning.
FAQ
What is the primary function of the 3500/25 module?
The 3500/25 Enhanced Keyphasor Module conditions signals from speed/phase transducers to provide a phase reference signal that is used by other monitors in the 3500 system for vibration and phase analysis.
Can this module accept both proximity probes and magnetic pickups?
Yes, the module is designed to accept inputs from both proximity probes and magnetic pickups, with configurable settings to match the specific transducer type.
What is the operating temperature range for this unit?
The module is rated for operation in environments ranging from -30 degC to +65 degC (-22 degF to +149 degF).
