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129478-01

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Bently Nevada 129478-01 is a high-voltage DC power input module for 3500/15 racks, providing reliable DC power conversion and full-rack support under extreme industrial conditions.
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Technical specifications for 129478-01

  • Manufacturer:
    Bently Nevada
  • Part Number:
    129478-01
  • Product Family:
    3500 System
  • Input voltage:
    88 to 140 Vdc
  • Full Rack Current Draw:
    2.5 A (maximum)
  • Operating temperature:
    -30 °C to +65 °C / -22 °F to +150 °F
  • Storage temperature:
    -40 °C to +85 °C / -40 °F to +185 °F
  • Humidity:
    95%, non-condensing
  • Description:
    This option uses the High Voltage DC Power Supply and the High Voltage DC Power Input Module (PIM).
  • Weight:
    0.3 kg
  • Estimated shipping dimensions:
    2.6x11.5x12cm
  • 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 Installation Diagnostics and Protection Application

Features:

  • Provides Stable High-Voltage DC Power To 3500/15 Rack Modules
  • Supports Full-Rack Operation With Redundant Power Configurations
  • Operates Reliably In Extreme Temperature And Humidity Conditions
The Bently Nevada 129478-01 is a high-voltage DC power input module designed to supply the 3500/15 monitoring rack with reliable external DC power. It ensures smooth transmission to the power supply module, enabling consistent operation of all connected monitoring components even under maximum load conditions.

This module integrates with the 3500/15 AC and DC power supply system and supports one or two power supplies per rack. When installed with a backup module, the 129478-01 maintains continuous operation during insertion or removal, providing flexibility for maintenance without affecting rack performance. Compared to low-voltage modules such as 129477-01, it delivers superior current handling and high-voltage input support for full-rack operation.

Designed for harsh industrial environments, the 129478-01 operates from -30 °C to +65 °C and can be stored between -40 °C and +85 °C, with 95% non-condensing humidity tolerance. Its robust design ensures long-term reliability and seamless compatibility with legacy 3500/15 systems, making it a preferred choice for critical high-voltage DC power applications.

The 129478-01 Bently Nevada Legacy High Voltage DC Power Input Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 129478-01 Legacy High Voltage DC Power Input 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 129478-01 Legacy High Voltage DC Power Input Module Specs

General

  • Manufacturer GE / Bently Nevada
  • Model 129478-01
  • Condition New Original ready stock
  • Product Family 3500/15,131151-01,129767-01
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.
  • Pairing Verification: This module must be used with 129486-01 (High Voltage DC Power Supply Module). Before installation, please verify the model number of the power supply module on the front. It is strictly forbidden to connect the high voltage DC input to an AC or low voltage DC module.
  • Slot Installation: Install the module at the rear of the power supply slot on the far left of the 3500 frame. When inserting, ensure the pins are aligned and tighten the screws evenly on both sides to ensure proper grounding.
  • Wiring Specifications: Use 18 AWG to 14 AWG wire. Due to the high voltage DC (110Vdc level), the terminals must be fitted with insulating sleeves to prevent electric shock or short circuits.
  • Upgrade Recommendation: If you plan to upgrade your existing system, it is recommended to consider replacing it with a Universal PIM (Power Module), which is compatible with both AC and high voltage DC, reducing spare parts inventory pressure.
  • Fuse Protection: The module integrates a high breaking capacity fuse. When an external power grid surge or a severe short circuit occurs at the back end, the fuse will quickly blow to isolate the fault and prevent damage to the frame backplate.
  • Polarity Foolproof Protection: Even if the DC positive and negative terminals are reversed during field wiring, the module's circuit design ensures that internal components will not burn out.
  • Electromagnetic Compatibility (EMC) Filtering: Built-in industrial-grade filtering circuitry eliminates ripple interference commonly found in high-voltage DC power supplies, ensuring that the current transmitted to the vibration monitoring module is "clean."
  • Redundancy Switching Diagnosis: When the frame is configured with dual power supplies, if the module's input loses power, the 3500/15 power module will immediately report a "Power Supply Failure" event via the rack interface module (RIM), achieving seamless switching and alarm activation.
  • Power Plant DC Power Supply: The most typical application scenario. Utilizing the reliable 110V/125V DC battery bank of the power plant for direct power supply ensures that the vibration monitoring system can still monitor the turning gear status even when all plant power is interrupted.
  • Aging System Maintenance: Specifically designed for spare parts replacement of 3500 systems commissioned between the 1990s and 2010, maintaining the original high-voltage DC power supply architecture.
  • Critical Unit Protection: In applications requiring extremely high availability (such as natural gas pipeline compressor stations), this module, used in conjunction with redundant power modules, provides dual independent high-voltage DC inputs.
  • Explosion-Proof Area Isolation: In certain explosion-proof designs, this module introduces high-voltage DC power into the control cabinet, working in conjunction with explosion-proof barriers to power field probes.
Description
The Bently Nevada 129478-01 is a legacy high-voltage DC power input module (PIM) designed for the 3500/15 power system. It introduces externally supplied high-voltage DC power into the rack and transmits it to the power supply module for regulated conversion. With an input voltage range of 88 to 140 Vdc and a maximum full-rack current draw of 2.5 A, the 129478-01 ensures stable operation across a wide range of industrial applications. Its operating temperature range of -30 °C to +65 °C (-22 °F to +150 °F) and storage range of -40 °C to +85 °C (-40 °F to +185 °F) make it highly suitable for extreme environmental conditions.

Compared to the Bently Nevada 129477-01 low-voltage DC input module, the 129478-01 provides higher voltage handling capability and robust current support for full-rack operation. While 129477-01 is suitable for low-voltage or backup applications, 129478-01 is optimized for primary DC power input, enabling reliable performance when paired with high-voltage DC power supplies. Additionally, 129478-01 supports redundancy configurations, allowing a second power module in the upper slot to act as a backup without disrupting rack operation—a feature shared with AC modules but critical for high-voltage DC applications.

The 129478-01 integrates seamlessly with the Bently Nevada 3500/15 AC and DC Power Supplies, which are half-height modules installed in designated left-side slots of the rack. One or two power supplies can be installed, and either module can power the full rack independently. The high-voltage capability of 129478-01 allows it to support full rack operation even under maximum load, unlike lower-voltage modules like 129477-01, which may require additional configuration for full-rack support.

With 95% non-condensing humidity tolerance and wide environmental ratings, the Bently Nevada 129478-01 provides unmatched reliability in industrial machinery monitoring. Its design ensures continuous operation during power supply insertion or removal when a backup is installed, reducing downtime and simplifying maintenance. Compared to similar models in the 3500 series, the 129478-01’s combination of high-voltage input, full-rack support, and environmental resilience makes it an ideal choice for legacy and modern 3500/15 monitoring systems.
Alternative Names
129486-01 133292-01 133300-01 106M1079-01
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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 input voltage range of Bently Nevada 129478-01?
The input voltage range is 88 to 140 Vdc, allowing it to handle high-voltage DC sources reliably.
How much current does the 129478-01 draw at full rack load?
The full rack current draw is 2.5 A maximum, sufficient to power all connected modules under standard conditions.
How is the 129478-01 installed in a 3500/15 rack?
It is installed in the designated left-side slot, and either one or two power supplies can be used with redundancy support.
What are the operating and storage temperature ranges for 129478-01?
Operating: -30 °C to +65 °C (-22 °F to +150 °F); Storage: -40 °C to +85 °C (-40 °F to +185 °F).

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