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135489-02

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Bently Nevada 135489-02 is a 4-channel I/O module with internal barriers and terminations, supporting 2 Prox/Accel and 2 Velomitor channels, compatible with 3500/42M and 3500/70M monitoring systems for intrinsically safe installations.
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Technical specifications for 135489-02

  • Manufacturer:
    Bently Nevada
  • Part Number:
    135489-02
  • Product Family:
    3500 System
  • Monitoring Channels:
    4
  • 2 Prox/Accel Channels:
    Supports eddy current sensors (Proximitor) or accelerometers.
  • 2 Velomitor Channels:
    Dedicated to supporting Velomitor speed sensors.
  • Operating Temperature:
    0°C to +65°C (+32°F to +150°F).
  • Storage Temperature:
    -40°C to +85°C (-40°F to +185°F).
  • Humidity:
    95% non-condensing.
  • Weight:
    0.96 kg
  • Estimated shipping dimensions:
    2.5x18.5x14cm
  • 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 Firmware Application Scenarios Configuration

Features:

  • Mixed Prox/Accel And Velomitor Channels Provide Flexible Sensor Monitoring
  • Internal Barriers And Terminations Ensure Intrinsically Safe Operation
  • Compatible With Multiple 3500 Series Monitor Modules For Hazardous Areas
The Bently Nevada 135489-02 I/O Module is engineered to deliver reliable sensor connectivity for 3500 series systems. Its combination of 2 Prox/Accel channels and 2 Velomitor channels allows operators to monitor multiple sensor types within a single module, providing versatility for both 3500/42M vibration and 3500/70M velocity monitoring applications.

This module is equipped with internal barriers and terminations, enhancing safety for intrinsically safe installations and simplifying wiring in hazardous environments. Compared to standard I/O modules, 135489-02 reduces the need for external protection devices and ensures accurate data transmission across the 3500 rack.

Although it can be technically installed in 3500/72M systems, it is primarily optimized for 3500/42M and 3500/70M modules where mixed Prox/Accel and Velomitor inputs are required. Its design allows standard and internal barrier modules to coexist within the same rack, offering flexibility for system upgrades while maintaining physical separation between safe and hazardous wiring.

The 135489-02 Bently Nevada I/O Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 135489-02 I/O 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 135489-02 I/O Module Specs

General

  • Manufacturer GE / Bently Nevada
  • Model 135489-02
  • Condition New Original ready stock
  • Product Family 149992-01,133388-02,146031-01
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.
  • Software Version Requirements: To enable the internal safety barrier function, Rack Configuration Software 2.3 or later (3500 Rack Configuration Software) is required.
  • Firmware Compatibility: 3500/42M: The monitor firmware must meet the minimum version requirement (the latest version is generally recommended to support all intrinsically safe parameter settings). Update Method: The I/O module itself typically does not independently store complex operating firmware; its functional logic is mainly controlled by the front-end monitor module (such as 3500/42M). Firmware updates usually refer to updating the monitor motherboard or Rack Interface Module (RIM).
  • Unconfigured State: When shipped from the factory, monitors such as the 3500/42 are in an "unconfigured" state. The I/O module channels must be activated after uploading the configuration file via software.
  • Hybrid Monitoring Needs: This module's unique 2+2 channel configuration is suitable for scenarios where both eddy current probes (for displacement measurement) and velocity detectors are used under the same monitor.
  • Typical Industries: Widely used for online monitoring of large rotating machinery (such as compressors, pumps, and steam turbines) in industries such as petrochemicals, oil refining, and power generation.
  • Environmental Limitations: When using the internal safety barrier I/O module, the operating temperature range is 0°C to +65°C. Note that this is slightly higher than the lower limit temperature of the standard I/O module (-30°C).
  • Space Layout: The internal safety barrier I/O module is approximately 50mm (2 in) deeper than the standard module, therefore it is not suitable for racks with a depth of only 400mm; a 600mm rack is recommended.
  • Channel Pair Programming: Channels for the 3500/42M and 3500/70M are typically configured in pairs (i.e., channels 1 & 2 in one group, and channels 3 & 4 in another).
  • Function Assignment: 3500/42M: Can be configured for radial vibration, axial displacement, eccentricity, acceleration, or speed functions. 3500/70M: Can be configured for impact acceleration, reciprocating speed, etc.
  • Grounding Requirements (Critical): In the frame configuration, the 3500/04 intrinsically safe grounding module must be identified and installed. If the grounding module is not correctly configured in the software, the safety barrier module may not function properly.
  • Alarm Setting: Through the configuration software, users can set an "Alert" value for each active proportional value and a "Danger" value for two of the proportional values.
Description
The Bently Nevada 135489-02 I/O Module is designed for 3500 series systems to provide safe and flexible connections for both velocity and vibration sensors. It features 2 Prox/Accel channels for eddy current or accelerometer sensors and 2 Velomitor channels dedicated to speed measurement, making it ideal for mixed sensor applications in 3500/42M and 3500/70M racks. Compared to modules like 135489-03, which is fully Velomitor-focused, 135489-02 offers mixed-channel versatility, allowing users to monitor multiple sensor types simultaneously.

Equipped with internal barriers and terminations, 135489-02 ensures intrinsically safe operation in hazardous areas, protecting both personnel and sensitive equipment. Unlike standard I/O modules, which may require external barriers or grounding, this module integrates safety features directly, simplifying installation and reducing field wiring complexity. When used with a 3500/04 IS Earthing Module, the system achieves proper IS grounding, though it occupies a dedicated rack slot.

While the module can technically be inserted into a 3500/72M system, it is not commonly recommended due to the specific sensor requirements of rod-drop monitoring. In contrast, 3500/42M and 3500/70M systems fully utilize the 2 Prox/Accel + 2 Velomitor configuration, ensuring accurate measurements and seamless integration. The 135489-02 also maintains compatibility with existing 3500 rack positions, allowing standard and internal barrier modules to coexist without compromising the required 50 mm separation between safe and hazardous wiring.

In addition to reliability and safety, 135489-02 provides installation flexibility. The increased module depth supports physical separation, and multiple modules can be grouped for simplified wiring management. Compared with other I/O modules, such as 135489-01 or 135489-03, 135489-02 stands out by offering mixed-channel capability, built-in safety barriers, and wide compatibility across 3500/42M and 3500/70M monitors, making it an optimal choice for industrial vibration and speed monitoring in hazardous areas.
Alternative Names
135489-01 135489-03 135489-04 138708-01 138708-02
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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 types of sensors does 135489-02 support?
It supports 2 Prox/Accel channels for eddy current or accelerometer sensors and 2 Velomitor channels for velocity sensors, ideal for 3500/42M and 3500/70M systems.
How does 135489-02 differ from 135489-03?
135489-03 focuses entirely on 4 Velomitor channels, whereas 135489-02 provides a mix of Prox/Accel and Velomitor channels for flexible multi-sensor applications.
Why is an IS Earthing Module required with 135489-02?
The 3500/04 IS Earthing Module provides intrinsically safe grounding for the internal barrier I/O module, ensuring safe operation in hazardous areas.
What are the operating temperature limits of 135489-02?
It operates from 0°C to +65°C and can be stored from -40°C to +85°C, supporting both 3500/42M and 3500/70M environmental conditions.

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