Bently Nevada 100M1554 pulse expander module for 3500 Series, overall view
Bently Nevada 100M1554 pulse expander module, product label and housing
Bently Nevada 100M1554 pulse expander module, connector and enclosure view
Bently Nevada 100M1554 pulse expander module for 3500 Series, overall view
Bently Nevada 100M1554 pulse expander module, product label and housing
Bently Nevada 100M1554 pulse expander module, connector and enclosure view
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100M1554

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The Bently Nevada 100M1554 Pulse Expander Module enhances keyphasor signal reliability by widening extremely narrow pulses, ensuring accurate speed and phase detection in 3500 Series monitoring systems.
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Technical specifications for 100M1554

  • Manufacturer:
    Bently Nevada
  • Part Number:
    100M1554
  • Product Family:
    3500 System
  • Applicable Systems:
    Bently Nevada 3500 Series
  • Power Supply:
    +24V DC (±10%), 2A typical
  • Operating Temperature:
    -40 °C ~ +70 °C
  • Mounting Method:
    DIN Rail Mounting
  • Certifications:
    UL, CE, ISO 9001
  • Weight:
    0.02 kg
  • Estimated shipping dimensions:
    7.6x2.1x3.8cm
  • Tariff Code:
    8406812000
  • Country of origin:
    USA
  • Place of shipment:
    Xiamen, Fujian, China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Specifications Firmware Certifications Application Scenarios

Features:

  • Widening Of Narrow Keyphasor Pulses Ensures Accurate Speed And Phase Detection
  • DIN Rail Mounting Provides Flexible And Secure Installation Within Control Cabinets
  • Wide Operating Temperature Range With +24V DC Power Supports Industrial Environments
The Bently Nevada 100M1554 Pulse Expander Module is a vital accessory for the 3500 Series, designed to address limitations in detecting extremely narrow keyphasor signals. It is particularly useful in high-speed or small-diameter machinery where brief pulses may cause errors in phase and speed measurement. By extending pulse widths, it ensures reliable signal acquisition, improving system stability and monitoring accuracy.

Its robust design allows it to operate in challenging industrial environments with temperatures ranging from -40 °C to +70 °C and standard +24V DC power. The DIN rail mounting provides flexibility, making it easy to integrate into existing cabinets without disrupting the 3500 system configuration.

By incorporating the Bently Nevada 100M1554 Pulse Expander Module, plants benefit from accurate dynamic monitoring, reduced false alarms, and improved predictive maintenance capabilities. It complements other 3500 Series modules seamlessly, enhancing overall machinery protection and operational reliability.

The 100M1554 Bently Nevada Pulse Expander Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 100M1554 Pulse Expander Module Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Bently Nevada 100M1554 Pulse Expander Module Specs

General

  • Manufacturer GE / Bently Nevada
  • Model 100M1554
  • Condition New Original ready stock
  • Product Family 100M1561,100M1560,100M1555
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
  • 3500/25 Module Firmware Compatibility: Ensure the 3500/25 key phase card firmware version supports external trigger adjustment to recognize the broadened signal.
  • Rack Configuration Software: The key phase trigger threshold must be set to "External Conditioning" mode in the software.
  • Hardware Version Iteration: Early A versions and later improved versions have minor optimizations in power consumption and pulse response time; the serial number must be verified during replacement.
  • No Program Update Required: This module typically does not have user-programmable firmware; the logic is implemented by internal ASIC or hard circuitry. Maintenance focuses on checking physical wiring.
  • CE Certification: Complies with EU Electromagnetic Compatibility (EMC) Directives.
  • CSA/NRTL/C: Complies with North American electrical safety standards, allowing installation in industrial control cabinets.
  • Ex/ATEX Intrinsic Safety Certification: Typically requires use with safety barriers; complies with non-increased safety area installation standards.
  • ISO 9001: Manufacturing processes adhere to general mechanical protection system quality standards.
  • Ultra-high-speed turbines: Speeds exceeding 10,000 RPM result in extremely short scan times of the key phase marker across the probe.
  • Small-diameter journal monitoring: The shaft diameter is too small, and the physical groove width is insufficient to generate a sufficiently long electrical pulse.
  • Long-distance signal compensation: Prevents narrow pulses from being "smoothed out" due to capacitance effects during long cable transmission.
  • Multi-tooth disc speed measurement: In certain turning gear or multi-gear speed measurement applications, converts high-frequency narrow pulses into square waves recognizable by the 3500 system.
Description
The Bently Nevada 100M1554 Pulse Expander Module is a specialized signal processing accessory designed for the 3500 Series systems. Its primary role is to address excessively narrow keyphasor pulses that can occur on high-speed or small-diameter rotating machinery. These pulses, generated by keyways or shaft protrusions detected by an eddy current probe, may be too brief for standard 3500 system modules to recognize consistently.

The module operates by receiving the raw pulse from the proximitor and internally timing it to output a widened pulse of sufficient duration. This ensures that the 3500 system can reliably capture the keyphasor signal, preventing errors such as "Keyphasor Invalid" and maintaining accurate phase and speed measurements. Without this module, operators may experience incorrect waveform readings, hindering tasks like dynamic balancing or fault diagnosis.

Designed for flexible installation, the Bently Nevada 100M1554 Pulse Expander Module is mounted on a DIN rail within the control cabinet, positioned between the probe preamplifier and the rear I/O module of the 3500 rack. It operates on a +24V DC (±10%) power supply with typical current draw of 2A, and is rated for temperatures between -40 °C and +70 °C, ensuring robust performance in industrial environments.

Its application is particularly valuable for high-speed machines, micro-markers, and multi-tooth configurations where pulse durations are insufficient. By converting these raw, narrow pulses into a stable, system-recognized signal, the Bently Nevada 100M1554 Pulse Expander Module enhances reliability, reduces false alarms, and supports precise condition monitoring and predictive maintenance.

By integrating the Bently Nevada 100M1554 Pulse Expander Module into the 3500 Series system, plants can maintain accurate rotational speed measurements and phase detection, even under challenging conditions where conventional keyphasor signals might fail. Its proven design ensures long-term stability and compatibility with existing 3500 Series equipment.
Alternative Names
100M1550 100M1551 100M1552 100M1553 100M1555
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What temperature conditions can the 100M1554 withstand?
It is rated for -40 °C to +70 °C, suitable for most industrial environments.
Is it certified for industrial compliance?
Yes, UL, CE, and ISO 9001 certifications are provided.
How does the module handle micro-markers or small shaft features?
It converts short-duration signals from tiny keyways into standard pulse widths.

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