3500/25 (149369-01+135473-01) Enhanced Keyphasor Module / Bently Nevada

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3500/25 Enhanced Keyphasor Module

The Bently Nevada 3500/25 Enhanced Keyphasor Module isa half-height, two-channel module used to provide Keyphasor signals to the monitor modules in a 3500 rack. The module receives input signals from proximity probes or magnetic pickups and converts the signals to digital Keyphasor signals that indicate when the Keyphasor mark on the shaft coincides with the Keyphasor transducer. The 3500 Machinery Protection System can accept up to four Keyphasor signals for normal configuration and up to eight Keyphasor signals in a paired configuration.

Notes: Keyphasor signal is a once-per-turn or multipleevent-per-turn pulse from a rotating shaft or gear used to provide a precise timing measurement. This allows 3500 monitor modules and external diagnostic equipment to measure shaft rotative speed and vector parameters such as 1X vibration amplitude and phase.

Specifications of 3500/25

Power Consumption:3.2 Watts typical
Input Impedance:21.8 kΩ minimum
Output Impedance:504 Ω maximum buffered output impedance.
Keyphasor Transducer Power Supply: -24 Vdc, 40 mA maximum per channel.
Storage Temperature:-40°C to +85°C (-40°F to+185°F)
Humidity:95%, non-condensing

+Main Module:

Dimensions (Depth x Height x Width):
119.9 mmx 24.4 mmx 256.5mm(4.72 inx 0.96 inx 10.10 in).
Weight:0.34 kg (0.76 lbs.)
+I/O Module:

Dimensions(HeightxWidthxDepth):
241.3 mmx 24.4 mmx 103.1 mm(9.50 inx 0.96 inx 4.06 in)
Weight:0.46 kg (1.01 lbs.)

3500/25 Spares

149369-01 - Enhanced Keyphasor Module

135473-01 - Keyphasor I/O Module (Internal Barriers and Internal Terminations.)

FAQ of 3500/25

What is the 3500/25 Enhanced Keyphasor Module (149369-01 + 135473-01)?
A: This is a half-height, two-channel module used in a Bently Nevada 3500 Machinery Protection System. It converts proximity probe or magnetic pickup signals into digital Keyphasor pulses (once-per-turn or multi-event) for speed and phase measurement. The 135473-01 I/O module provides internal barriers and internal terminations for hazardous area applications.

Is the 149369-01 module backward compatible with older Keyphasor modules?
A: Yes. It is a direct plug-in replacement for the older 125792-01 module and maintains complete downward compatibility in form, fit, and function.

How many Keyphasor signals can the 3500 system handle with this module?
A: Up to four Keyphasor signals in normal configuration, or eight signals in paired configuration, using up to four Keyphasor modules.