Bently Nevada 3500/50M 286566-02
Bently Nevada 3500/50M 286566-02
Bently Nevada 3500/50M 286566-02
Bently Nevada 3500/50M 286566-02
Bently Nevada 3500/50M 286566-02
Bently Nevada 3500/50M 286566-02
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    Apter Power supplies verified Bently Nevada 3500 Series hardware to ensure accurate machinery speed and vibration monitoring, maintain critical asset protection, and prevent unexpected plant downtime.

3500/50M 286566-02

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The Bently Nevada 3500/50M 286566-02 is a 2-channel tachometer module designed for accurate shaft speed, acceleration, and rotor direction monitoring, integrated into the 3500 Series Machinery Protection System.
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Technical specifications for 3500/50M 286566-02

  • Manufacturer:
    Bently Nevada
  • Part Number:
    3500/50M 286566-02
  • Product Family:
    3500 System
  • Product Type:
    Tachometer Module
  • Stock:
    1
  • Inputs Signal:
    Each 3500/50M Tachometer Module accepts up to two transducer signals from proximity probe transducers or magnetic pickups.
  • Input signal range:
    +10.0 V to -24.0 V
  • Input impedance:
    20 k Ω (standard), 40 k Ω (TMR), 7.15 k Ω (Internal Barrier)
  • Power consumption:
    5.8 watts, typical
  • Transducers:
    Accepts 1 to 2 proximity transducer signals
  • OK LED:
    Indicates when the 3500/50M Tachometer Module is operating properly
  • TX/RX LED:
    Indicates when the Tachometer Module is communicating with other modules in the 3500 rack.
  • Bypass LED:
    Indicates when the Tachometer Module is in Bypass Mode.
  • Rack Space Requirements:
    1 full-height front slot
  • Weight:
    0.9 kg
  • Estimated shipping dimensions:
    2.8x25.8x24cm
  • Tariff Code:
    8537101190
  • 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 Use Cases Safety & Compliance Firmware & Updates

Features:

  • Signal Reception from Proximity Probes or Magnetic Pickups for Shaft Speed Determination
  • Dual-Channel Architecture Supporting Speed, Acceleration, and Direction Monitoring
  • Integrated Keyphasor Signal Generation for Backplane Distribution to Other Monitors
The Bently Nevada 3500/50M 286566-02 serves as the Tachometer Module within a 3500 rack, providing precise measurement of shaft rotative speed, rotor acceleration, and rotor direction. It continuously accepts input signals from proximity probes or magnetic pickups (supporting 1-255 events per revolution) and processes these signals to deliver real-time speed data with exceptional accuracy: ±0.1 rpm for speeds below 100 rpm, ±1 rpm for 100-10,000 rpm, and ±0.01% for speeds up to 99,999 rpm. The module distributes conditioned Keyphasor signals through the rack backplane, eliminating the need for separate Keyphasor modules while supporting coordinated monitoring across the entire system.

The 3500/50M 286566-02 provides essential speed monitoring functions critical to machinery protection, serving as a key component of the measurement path that directly impacts the proper operation of the overall monitoring system. One 3500/50M 286566-02 module occupies a single full-height slot in the rack and can be installed in any available slot position from 1 to 15. Each module accepts up to two transducer signals and supports a maximum input frequency of 20 kHz.

For comprehensive machinery protection applications, the 3500/50M 286566-02 offers multiple configurable monitoring modes through the 3500 Rack Configuration Software. In addition to standard speed monitoring with setpoint alarming, the module can be configured for speed band alarming, zero speed notification, rotor acceleration alarming, or reverse rotation notification. When the system detects measurements that violate user-programmable alarm setpoints, it automatically generates alarms and can trigger relay outputs through companion modules, placing events in the System Event List for diagnostic purposes.

The 3500/50M 286566-02 includes a peak hold feature that stores the highest speed, highest reverse speed, or number of reverse rotations reached by the machine, with user-resettable peak values for maintenance analysis. The module operates with typical power consumption of 5.8 watts and provides front panel LEDs indicating OK status, TX/RX communication activity, and bypass mode for quick visual diagnostics.

The 3500/50M 286566-02 Bently Nevada Tachometer Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 3500/50M 286566-02 Tachometer 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 3500/50M 286566-02 Tachometer Module Specs

General

  • Manufacturer Bently Nevada
  • Model 3500/50M 286566-02
  • Condition New Original ready stock
  • Product Family 3500/50,3500/50M,133388-02
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.
  • Speed Monitoring: Real-time tracking of rotational speed for turbines, motors, and generators.
  • Safety Notifications: Detecting critical states such as Zero Speed (shaft stopped) or Reverse Rotation (shaft turning in the wrong direction).
  • Condition Monitoring: Measuring rotor acceleration to identify rapid speed changes that could indicate mechanical failure.
  • Keyphasor Substitution: It can be configured to provide conditioned Keyphasor signals to the 3500 rack backplane, often eliminating the need for a dedicated Keyphasor module.
  • Peak Hold Analysis: It stores the highest recorded speed or number of reverse rotations for later diagnostics.
  • Functional Safety: The 3500 system is generally available with SIL 2 (Safety Integrity Level) ratings, meaning it is certified for use in safety instrumented systems.
  • Hazardous Areas: It is compliant with standards such as ATEX/IECEx Zone 2 and CSA/NRTL Class 1 Division 2, allowing for operation in environments with potentially explosive atmospheres.
  • Regulatory Approvals: The module meets FCC Part 15 requirements for interference and is part of the 3500 Series EU Declaration of Conformity.
  • Not for Overspeed Protection: It must not be used independently as an overspeed protection or speed control system because it lacks the necessary protective redundancy and response speed for those critical functions. Bently Nevada recommends the 3701/55 specifically for overspeed protection.
  • 3500/50M Module Firmware: Requires Revision 5.30 or later.
  • 3500 Rack Configuration Software (3500/01): Requires Version 4.20 or later. 3500/22M Module Firmware: Requires Revision 1.70.
  • Software Compatibility: Data Acquisition (3500/02) should be at least Version 2.52, and Display Software (3500/03) should be Version 1.52 or later.
  • Incompatibility: The 3500/50M is not compatible with any version of the 3500/20 Rack Interface Module.
Description
The Bently Nevada 3500/50M 286566-02 Tachometer Module provides precise monitoring of rotating machinery by accepting up to two input signals from proximity probe transducers or magnetic pickups. Each module features an input range of +10.0 V to -24.0 V with standard input impedance of 20 kΩ, TMR configuration at 40 kΩ, or 7.15 kΩ using the internal barrier. Typical power consumption is 5.8 watts, and it occupies a full-height front slot in the 3500 rack. LED indicators display module status: OK LED for normal operation, TX/RX LED for rack communication, and Bypass LED for bypass mode.

The 3500/50M module measures shaft speed, rotor acceleration, and rotor direction, comparing values to user-programmable alarm setpoints and generating alerts if thresholds are exceeded. Configuration is performed through 3500 Rack Configuration Software, supporting multiple modes including speed monitoring with setpoint and speed band alarming, zero speed notification, rotor acceleration alarming, and reverse rotation notification. Conditioned Keyphasor signals can be supplied directly to the 3500 backplane, eliminating the need for a separate Keyphasor module.

The module also includes a peak hold function, recording the highest speed, reverse speed, or number of reverse rotations reached by the machine. Peak values can be reset by the operator, providing detailed operational insight for maintenance and performance monitoring. Designed for mission-critical applications, the 3500/50M 286566-02 ensures reliable, accurate, and configurable tachometer monitoring in industrial environments.
Alternative Names
35OO/5OM 286566-O2 3500/50M 2B6566-02 3500/50M 286566-0Z 3500-50M 286566-02 350050M 28656602 3500 50M 286566 02
Technical notes
The Bently Nevada 3500/50M 286566-02 features a peak hold function that stores the highest speed, highest reverse speed, or the total number of reverse rotations reached by the machine, all of which can be manually reset by operators.
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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 Bently Nevada 3500/50M 286566-02 Tachometer Module?
The Bently Nevada 3500/50M 286566-02 Tachometer Module is a dual-channel machinery protection module designed to monitor shaft rotational speed, rotor acceleration, and rotation direction. It accepts signals from proximity probes or magnetic pickups to provide continuous speed monitoring for critical rotating equipment.
What functions does the 3500/50M 286566-02 provide?
The module continuously measures rotational speed and compares the collected data with user-configured alarm setpoints. It supports speed monitoring, rotor acceleration detection, reverse rotation monitoring, and zero-speed notification to help protect rotating machinery.
What problems can the 3500/50M 286566-02 help prevent?
The module helps detect overspeed conditions, reverse rotation, abnormal acceleration, and unexpected startup behavior before they develop into serious mechanical failures. Early detection reduces the risk of equipment damage, production interruptions, and costly maintenance.

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