Bently Nevada 81544-01
Bently Nevada 81544-01
Bently Nevada 81544-01
Bently Nevada 81544-01
Bently Nevada 81544-01
Bently Nevada 81544-01
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81544-01

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The Bently Nevada 81544-01 is a dedicated back-end I/O module for the 3300 series, converting monitored data into standard analog signals while supporting real-time vibration acquisition. This -01 version contains no internal relays, ensuring reliable signal processing for industrial monitoring systems.
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Technical specifications for 81544-01

  • Manufacturer:
    Bently Nevada
  • Part Number:
    81544-01
  • Product Family:
    3300 System
  • Relay Configuration:
    No Relays
  • Number of Channels:
    2 Independent Channels
  • Installation Location:
    3300 Rack Rear End
  • Compatible Monitor:
    3300/16
  • Operating Temperature:
    0°C to +65°C (+32°F to +150°F).
  • Storage Temperature:
    -40°C to +85°C (-40°F to +185°F).
  • Relative Humidity:
    To 95%, non-condensing.
  • Input Impedance:
    10 k Ω.
  • Power Consumption:
    2 watts (nominal)
  • Weight:
    0.26 kg
  • Estimated shipping dimensions:
    5x9.8x22.8cm
  • Tariff Code:
    3902100090
  • 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 Safety Features Performance Application

Features:

  • Dedicated Signal Conditioning And Buffered Output For Real-Time Vibration Monitoring.
  • Two Independent Channels Supporting High-Fidelity Data Acquisition.
  • Designed For Rear-End Installation In 3300 Series Racks With No Internal Relays. Introduction Paragraphs
The Bently Nevada 81544-01 module provides precise signal conversion and reliable I/O performance for industrial monitoring systems. Its two-channel design and buffered outputs allow users to acquire high-quality vibration signals in real-time, supporting critical machinery diagnostics and predictive maintenance programs.

Engineered for industrial environments, the Bently Nevada 81544-01 handles wide temperature ranges and high humidity levels, making it suitable for various applications including turbines, compressors, and rotating equipment. The module ensures minimal maintenance while maintaining accuracy over long operational periods.

With seamless integration into the 3300 series system, the Bently Nevada 81544-01 offers a cost-effective and dependable solution for monitoring multiple parameters simultaneously. Its dedicated I/O capabilities and robust construction extend the operational life of vibration monitoring networks, supporting safe and efficient plant operations.

The 81544-01 Bently Nevada Spare Relay Module Assemblies (No Relays) may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 81544-01 Spare Relay Module Assemblies (No Relays) 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 81544-01 Spare Relay Module Assemblies (No Relays) Specs

General

  • Manufacturer GE / Bently Nevada
  • Model 81544-01
  • Condition New Original ready stock
  • Product Family 3300/16,126648-01,126640-01
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.
  • Signal Isolation: Provides initial electrical isolation between the sensor input and the frame power supply, preventing external electromagnetic interference from affecting the monitor's core circuitry.
  • Intrinsically Safe Compatibility: When used with Bently Nevada safety barriers, it meets explosion-proof requirements for hazardous areas.
  • Fault Monitoring: Supports sensor OK status detection. In the event of a sensor circuit open or short circuit, the module ensures the monitor identifies and locks the alarm, preventing false tripping.
  • Passive Design Risk Mitigation: Since this version (No Relays) does not contain physical relays, it eliminates the risk of unauthorized mechanical shutdown due to relay contact sticking or malfunction.
  • High Linearity Output: The recorder output (4-20mA or 1-5Vdc) has extremely high linearity accuracy, ensuring that the value transmitted to the DCS/PLC is completely synchronized with the monitor's display value.
  • Wideband Response: The buffered output interface enables lossless transmission of high-frequency vibration waveforms, supporting analysis bandwidths up to 10kHz.
  • Multi-Range Switching: Internal adjustable jumpers allow users to quickly switch the output signal between 4-20mA, 1-5Vdc, or 0-10Vdc as needed.
  • Environmental Tolerance: The circuit board is coated with anti-corrosion paint, enabling long-term stable operation in industrial high-temperature environments ranging from 0°C to +65°C.
  • DCS/PLC Logic Control: When the factory's interlocking trip logic is handled by the backend DCS or PLC, the 81544-01 only handles signal transmission, saving hardware costs.
  • Centralized Alarm System: With the 3300/10 dedicated relay module already equipped within the 3300 framework, individual channels do not require their own relays; this module is used as a standard interface.
  • Dynamic Equipment Condition Monitoring: Specifically designed for the physical input of radial vibration, axial displacement, or keyphasor signals for rotating machinery (such as steam turbines, compressors, and fans).
  • Legacy System Spare Part Replacement: Serves as a standard maintenance spare part for the 3300 series (discontinued but widely in service), used to replace older modules damaged by terminal corrosion or aging of analog circuits.
Description
The Bently Nevada 81544-01 Spare Relay Module Assembly (No Relays) is specifically designed for installation at the rear end of the 3300 series rack. Despite its “Relay Module Assembly” designation, the -01 version contains no internal electromagnetic relay contacts, allowing it to focus purely on signal conditioning and output.

Equipped with two independent channels, the module interfaces with field transmitters or preamplifiers via two sets of screw terminals. It provides buffered output ports through coaxial connectors, enabling real-time acquisition of raw vibration signals essential for precise machinery monitoring.

The circuit board inside the Bently Nevada 81544-01 performs signal conditioning to convert processed monitor data into standard analog signals, ensuring compatibility with the 3300/16 monitor. Its 10 kΩ input impedance and 2-watt nominal power consumption make it efficient while maintaining high fidelity of transmitted signals.

Designed to operate under a wide range of environmental conditions, the module supports temperatures from 0°C to +65°C (+32°F to +150°F) and can be stored at -40°C to +85°C (-40°F to +185°F). It also tolerates relative humidity up to 95%, non-condensing, providing dependable performance in challenging industrial environments.

The Bently Nevada 81544-01 seamlessly integrates with the 3300 system, offering a reliable solution for vibration monitoring applications where high signal integrity and accurate data transmission are critical. Its design ensures extended service life and minimal maintenance, making it a preferred choice for rotating machinery protection and diagnostics.
Alternative Names
78462-02 122243-01 82926-01 133442-01 125760-01
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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 is the primary function of the Bently Nevada 81544-01?
It converts data from the 3300/16 monitor into standard analog signals and provides buffered outputs for real-time vibration acquisition.
Why does the -01 version not include relays?
The -01 (No Relays) designation ensures the module focuses solely on I/O processing without relay switching, improving signal reliability.
What are the operating temperature limits?
It operates safely between 0°C and +65°C (+32°F to +150°F) and can be stored at -40°C to +85°C (-40°F to +185°F).
Which monitor is the module compatible with?
The Bently Nevada 81544-01 is compatible with the 3300/16 monitor, fully integrating into the 3300 series system.

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