• High-precision Keyphasor signal processing with 0.1° angular resolution for rotational reference measurement (0 to 250,000 RPM range)
• Dual-input support for inductive proximity Keyphasor sensors (3300 Series) and optical Keyphasor sensors with configurable trigger levels
• Real-time shaft speed measurement with ±0.01 RPM accuracy and speed trend monitoring for early detection of speed fluctuations
• Phase angle measurement relative to Keyphasor reference for vibration analysis, machinery balancing, and fault localization
• Configurable alarm thresholds for under-speed/over-speed conditions with adjustable time delays (0-60 seconds)
• Continuous self-diagnostic monitoring (sensor fault, signal loss, module error) with real-time fault reporting to 3500 controller
• Hot-swappable design for module replacement without interrupting 3500 system operation or rotational reference measurement

• Compliance with industrial standards (UL, CE, ATEX) for use in hazardous and general industrial environments

Key phase device module 3500/25-AXX-BXX-CXX selection:

A: Number of channels

0 1 1 Half-height 2-channel key phase sensor card (ordered for 2-channel)

0 2 2 half-height 2-channel key camera clips (ordered for 4-channel)

B: Input/Output (I/O) module type

0 1 I/O module with internal terminals

0 2 I/O module with external terminals

0.3 I/O modules with internal safety barriers and internal terminals

0 4 Insulated I/O module with internal terminals

0 5 Insulated I/O module with external terminals

C: Approval unit option 00 None 01 CSA/NRTL/C

bently nevada 3500/25-01-01-00(149369-01,125800-01) Bently key phase module spare parts

149369-01 Improved Keyphase Module

Note: After being ordered, this module can be directly inserted into the frame to replace the keyphase module 125792-01.

125800-01 Key phase Input/Output (I/O) Module (with Internal terminals)

126648-01 Key phase Input/Output (I/O) Module (with External terminals)

125800-02 Insulated Key phase Input/Output (I/O) Module (with Internal terminals)

126648-02 Insulated Key phase Input/Output (I/O) Module (with External terminals)

135473-01 Key Phase Input/Output (I/O) Module (with internal safety barrier and internal terminals)

04425545 Grounding WristBand (Single Purpose)

00580438 connector, internal terminal, 4 positions, green

00502133 connector, internal terminal, 12 positions, blue

129770-01 Key Phase Module Manual

• Keyphasor reference measurement for gas turbine vibration analysis and balancing in combined-cycle power generation plants
• Rotational position monitoring for centrifugal compressors in oil & gas refineries and pipeline compression stations
• Shaft speed and phase angle measurement for large electric motors and pumps in petrochemical processing facilities
• Precision Keyphasor reference for steam turbine vibration analysis and fault diagnosis in thermal power generation plants
• Rotational speed monitoring for mining equipment (crushers, mill drives) in abrasive and high-vibration mining environments
• Keyphasor measurement for marine engine and propulsion system rotational analysis on offshore platforms
• Shaft speed monitoring for steel mill rolling mill drives and gearboxes in high-speed manufacturing applications

• Rotational reference measurement for reciprocating compressor crankshaft position in natural gas processing facilities