3500/25-PWA149369-01 - Keyphasor Module

3500/25-PWA149369-01 - Keyphasor Module 3500/25-PWA149369-01 - Keyphasor Module

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Part Number: 3500/25-PWA149369-01
Manufacturer: Bently Nevada
Product Type: Enhanced Keyphasor Module
Series: 3500
Power Consumption: 3.2 Watts
Input Impedance: 21.8 k Ohm minimum
Operating Temperature: -30°C to +65°C (-22°F to +150°F)
Availability: In Stock
Country of Origin: USA

3500/25-PWA149369-01 is an Enhanced Keyphasor Module manufactured by Bently Nevada and used in Machinery Condition Monitoring systems. A half-height, two-channel module called the 3500/25 Enhanced Keyphasor Module transmits Keyphasor signals to the monitor modules in a 3500 rack. When the Keyphasor mark on the shaft aligns with the Keyphasor transducer, the module detects the alignment using magnetic pickups or proximity probes and converts the input signals into digital Keyphasor signals. For regular setup, the 3500 Machinery Protection System can accept up to four Keyphasor signals, and for paired configuration, it can accept up to eight. An enhanced 3500 system module is called the Enhanced Keyphasor Module. While maintaining full downward compatibility in terms of shape, fit, and function with existing Keyphasor modules for usage in legacy systems, it offers increased Keyphasor signal processing capabilities over the prior design. The revised 149369-01 module totally replaces the Keyphasor module, PWA 125792-01.


Front and Rear View of 3500/25 Keyphasor module

Figure 2: Front and Rear View of 3500/25 Keyphasor module

The 3500 system should use two Keyphasor modules whenever a system Keyphasor input is required for Triple Modular Redundant (TMR) applications. In this setup, the modules operate in parallel to give the other modules in the rack a primary and secondary Keyphasor signal. If there are no more than four primary Keyphasor input signals, a system with more than four Keyphasor inputs may use a paired arrangement.


  • Two consecutive monitoring locations in either the upper/lower half-slot positions or both half-slot positions are needed for a paired configuration. Four Keyphasor modules will offer four output channels and accept four primary and four backup input channels (one per module). It is also feasible to set up three Keyphasor modules, two coupled and one non-paired.
  • The user may configure the single unpaired Keyphasor in such a way. The Isolated Keyphasor I/O module is intended for use in situations where many devices are connected to Keyphasor signals simultaneously and where isolation from other systems, such as a control system, is necessary.
  • Despite being designed primarily for Magnetic Pickup applications, the Isolated I/O module is compatible with and will offer isolation for Proximitor* applications as long as an external power supply is present.
  • World of Controls has the most comprehensive catalog of Bently Nevada Replacement parts. Our professionals are standing by to help you with your needs. If you require any additional information, please contact WOC.



Does WOC sell to international Non-USA customers?

Yes, WOC offers services to clients around the globe. In fact, a large portion of our company is international, and we have experience shipping to locations all over the world.

Are the Products Genuine OEM Units?

These items have been certified by WOC Quality Control to be genuine OEM Units obtained through OEM or independent third-party channels.

Why Choose WOC Parts?

Industrial part sourcing is a specialty of the WOC team, We have years of experience locating uncommon and out-of-production equipment that our customers require in order to resume their operations. Although there are other businesses that make similar claims, we are certain that our dedication to quality and value is unmatched in our industry.