Product details

Origin:USA

Brand:bently

Product ID:125065-15

product description 

Enhanced Keyphasor Module

Description

The 3500/25 Enhanced Keyphasor Module is a half-height,two-channel module used to 

provide Keyphasor signals tothe monitor modules in a 3500 rack. The module receivesinput 

signals from proximity probes or magnetic pickups andconverts the signals to digital Keyphasor 

signals that indicatewhen the Keyphasor mark on the shaft coincides with theKeyphasor 

transducer. The 3500 Machinery ProtectionSystem can accept up to four Keyphasor signals 

for normalconfiguration and up to eight Keyphasor signals in a pairedconfiguration.

The Enhanced Keyphasor Module is an improved 3500system module. It offers expanded 

Keyphasor signalprocessing capabilities over the previous design whilemaintaining complete 

downward-compatibility in terms ofform, fit and function with existing Keyphasor modules for 

usein legacy systems. The Keyphasor module, PWA 125792-01, iscompletely replaced by the 

updated 149369-01 module.

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.

A system with more than four Keyphasor inputs may use apaired configuration provided there are 

no more than four primary Keyphasor input signals. A pairedconfiguration requires two 

consecutivemonitoring positions in either the upper/loweror both half-slot positions. Four 

Keyphasormodules will accept four primary and fourbackup input channels and provide four 

outputchannels (one per module). A configuration oftwo paired and one non-paired (threeKeyphasor 

modules total) is also possible. Insuch a configuration, the user may configurethe one non-paired 

Keyphasor (order eithertwo 2-channel or one 1-channel and one 2-channel option)

The Isolated Keyphasor I/O module is designedfor applications where the Keyphasor signalsare 

tied in parallel to multiple devices andrequire isolation from other systems, such as acontrol system. 

The Isolated I/O module wascreated specifically for Magnetic Pickupapplications but is compatible 

with and willprovide isolation for Proximitor* applications aslong as an external power supply is provided.

The intent of this I/O module was primarily tomeasure shaft speed and not phase. Themodule can 

provide phase measurements, butthis I/O introduces a slightly higher phase shiftthan the Non-Isolated 

I/O version. Figure 1shows the amount of phase shift that theIsolated I/O modules will add at 

differentmachine speeds.

Enhanced product features include generationof once-per-turn event signals from multievent-per-turn 

inputs, field-upgradeablefirmware, and asset management datareporting.