125800-01 Keyphasor I/O module

The 125800-01 Function Description
The critical phasor signals generated by the shaft or gear at one or several revolutions can be used to accurately

identify timing. Thus, the 3500 monitor module and external diagnostic tools can measure shaft speed and vector characteristics such as 1X amplitude and phase.
The Enhanced Keyphasor module is the Enhanced 3500 system module. It improves the previously designed Keyphasor

signal processing capabilities while maintaining full downward compatibility with the current Keyphasor module in terms of shape, fit, and functionality for use with older systems.
The Keyphasor module PWA 125792-01 has been completely replaced by the newer module 149369-01. When three-mode

redundancy (TMR) applications require system Keyphasor input, a 3500 system should use two Keyphasor modules. In this

design, these modules transmit both primary and secondary Keyphasor signals to other modules in the rack.

characteristic

• Systems with more than four key phase inputs may use a paired arrangement as long as there are no more than four
• primary key phase input signals. The paired design requires two continuous monitoring stations at the upper/lower or two half-slot locations.
• The four Keyphasor modules will accept four primary input channels and four alternate input channels, and provide
• four output channels (one per module). Configurations of two paired and one unpaired key phaser modules (for a total
• of three key phaser modules) are also possible. In this case, the user can configure a single unpaired Keyphasor(order two 2-channel or one 1-channel and one 2-channel option)