The Bently Nevada 149369-01 3500/25 Enhanced Keyphasor Module is a specialized device used in machinery monitoring systems to provide Keyphasor signals. Here’s a breakdown of its features, specifications, and ordering information:

Description

• The module receives input signals from proximity probes or magnetic pickups and converts them into digital Keyphasor signals.
• Keyphasor signals indicate when a specific mark on a rotating shaft aligns with the Keyphasor transducer.
• The system can accept up to four Keyphasor signals in a normal configuration and up to eight in a paired configuration.
• Keyphasor signals are essential for precise timing measurements, including shaft rotational speed and vector parameters like 1X vibration amplitude and phase.

Enhancements

• The Enhanced Keyphasor Module improves upon the previous design with expanded signal processing capabilities.
• It maintains backward compatibility with existing Keyphasor modules for legacy systems.
• The older Keyphasor module (PWA 125792-01) is replaced by the newer 149369-01 module.

Configuration

• In Triple Modular Redundant (TMR) applications, two Keyphasor modules are used to provide primary and secondary Keyphasor signals.
• Paired configurations are possible for systems with more than four Keyphasor inputs, allowing four primary and four backup input channels.

Isolated Keyphasor I/O Module

• Designed for Keyphasor signals tied in parallel to multiple devices and requiring isolation from other systems.
• Suitable for Magnetic Pickup applications with the addition of an external power supply.
• Note that this module primarily measures shaft speed, and it introduces a slightly higher phase shift compared to the non-isolated version.

Enhanced Product Features

• Offers the generation of once-per-turn event signals from multi-event-per-turn inputs.
• Supports field-upgradeable firmware.
• Provides asset management data reporting.

Specifications (Selected)

• Power Consumption: 3.2 Watts typical.
• Input Signal Range: +0.8 V to -21.0 V (Non-Isolated I/O modules) or +5V to -11V (Isolated I/O modules).
• Input Impedance: 21.8 kΩ minimum.
• Input Range: 1 to 1,200,000 cpm (0.017 to 20 kHz).
• Output Range: 1 to 99,999 cpm (0.017 to 1667 Hz).
• Output Impedance: 504 Ω maximum buffered output impedance.
• Keyphasor Transducer Power Supply: -24 Vdc, 40 mA maximum per channel.
• Operating Temperature: -30°C to +65°C (-22°F to +150°F).

Environmental Limits

• Operating Temperature ranges depending on the use of Internal Barrier I/O Module or Keyphasor I/O Module.

Compliance and Certifications

• Complies with EMC standards and electrical safety standards.
• Certified for hazardous area use.

Physical Dimensions (Main Module)

• Height x Width x Depth: 119.9 mm x 24.4 mm x 256.5 mm.
• Weight: 0.34 kg (0.76 lbs.).

Rack Space Requirement

• Main Module: 1 half-height front slot.
• I/O Modules: 1 full-height rear slot.

Ordering Considerations

• Different options are available based on the number of channels, type of I/O module, and agency approval requirements.
• External Termination Blocks and Cables may need to be ordered separately.
• Consult with a qualified Bently Nevada sales representative for complex applications.

To learn more about the Bently Nevada 149369-01 3500/25 Enhanced Keyphasor Module, please read the PDF online:  3500-25-01-01-00