Bently Nevada 3500/32M 149986-02 four-channel relay module for machinery alarm and protection logic
Bently Nevada 3500/32M 149986-02 relay module, showing four-channel terminal connections and identification markings
Bently Nevada 3500/32M 149986-02 four-channel relay I/O module with circuit board, relays, and rack connector
Bently Nevada 3500/32M 149986-02 four-channel relay module for machinery alarm and protection logic
Bently Nevada 3500/32M 149986-02 relay module, showing four-channel terminal connections and identification markings
Bently Nevada 3500/32M 149986-02 four-channel relay I/O module with circuit board, relays, and rack connector
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3500/32M 149986-02

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The Bently Nevada 3500/32M 149986-02 is a four-channel SPDT relay module providing programmable alarm logic for precise machinery protection and operational control.
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Technical specifications for 3500/32M 149986-02

  • Manufacturer:
    Bently Nevada
  • Part Number:
    3500/32M 149986-02
  • Product Family:
    3500 System
  • Product Type:
    Relay Module
  • Stock:
    4
  • Inputs Power Consumption:
    5.8 Watts typical
  • OK LED:
    Illuminated when module is functioning properly.
  • TX/RX LED:
    Transmit and Receive. Flashes to indicate proper communications between this module and other modules within the rack.
  • CH ALARM LED:
    Illuminated to indicate that the Relay Channel is in an alarm state.
  • Relays Type:
    Single-pole, double-throw (SPDT) relays
  • Environmental Sealing:
    Epoxy-sealed
  • Arc Suppressor:
    250 Vrms, installed as standard
  • Contact Life:
    100,000 cycles @ 5 A, 24 Vdc or 240 Vac
  • Operation:
    Each relay of the four channels is switch selectable for Normally Deenergized or Normally Energized.
  • 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
  • Weight:
    0.78 kg
  • Estimated shipping dimensions:
    2.8x25x24cm
  • 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 Applications Configuration Compatibility & Interoperability

Features:

  • Interface Between Protection Logic and Field Control Devices
  • Combines Capability of Independent Relay Control with Programmable Voting Logic
  • Operates in Conjunction with the M Series and Standard 3500 Monitors
The 3500/32M 149986-02 operates as the 4-Channel Relay Module in a 3500 rack, providing four independent relay outputs to interface with external control systems. Each relay on the 3500/32M 149986-02 can be independently programmed to perform voting logic using AND and OR operations, and can utilize alarming inputs (Alert and Danger statuses), Not-OK signals, or individual PPLs from any monitor channel or any combination of monitor channels in the rack. Seamless integration is standard with the 3500/32M 149986-02, allowing flexible alarm drive configuration to meet diverse application needs through the Bently Nevada™ 3500 Rack Configuration Software. The 3500/32M 149986-02 has made improvements in several areas over previous relay module designs in addition to incorporating full-height module capability within the 3500 rack.

The 3500/32M 149986-02 provides essential relay output functions common to the entire rack, and is a critical component of the protection path, directly affecting the proper, normal operation of the overall monitor system. Any number of 3500/32M 149986-02 modules can be placed in any of the slots to the right of the Transient Data Interface Module depending on the desired output expansion level. The 3500/32M 149986-02 occupies a single full-height slot in the rack and is never located in Slot 0 (the dedicated power supply slots).

For Multi-Module Relay applications, the 3500 System requires additional 3500/32M 149986-02 modules installed in available slots to the right of the Transient Data Interface Module. In addition to standard single module operation, the multi-module configuration also performs independent channel control. The 3500 relay configuration executes protection logic using the internal circuitry specified in the relay module options. Using this method, the 3500/32M 149986-02 continually monitors the status of assigned monitor channels. If the system detects that configured alarm conditions are met (Alert, Danger, Not-OK, or PPL states), it will automatically activate the corresponding relay output and place an event in the System Event List.

The 3500/32M 149986-02 Bently Nevada 4-Channel Relay Module may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
Bently Nevada 3500/32M 149986-02 4-Channel Relay 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 3500/32M 149986-02 4-Channel Relay Module Specs

General

  • Manufacturer Bently Nevada
  • Model 3500/32M 149986-02
  • Condition New Original ready stock
  • Product Family 125720-01,125720-02,149986-02
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.
  • Vibration & Speed Monitoring: Receives alarm signals from vibration or speed monitoring systems to trigger external alarms or equipment stops.
  • Machine Shutdowns: Used in over-speed or over-vibration protection systems to safely shut down critical assets.
  • External Device Control: Drives external annunciators, beacons, or control systems to alert operators to potential faults.
  • Safety-Critical Systems: Used in SIL 1 or SIL 2 (Functional Safety) environments to ensure fail-safe operation (e.g., de-energizing during faults).
  • Voting Logic: Each of the four channels can be independently programmed with "AND/OR" voting logic.
  • Alarm Drive Logic: Relays can be triggered by Alert/Danger statuses, "Not-OK" conditions, or individual Proportional Process Variables (PPLs) from any monitoring channel in the rack.
  • Switch Selectable: Each channel can be hardware-configured for Normally Energized (NE) or Normally De-energized (NDE) operation.
  • Adjustable Settings: Supports adjustable trip settings and time delays to prevent nuisance alarms.
  • Core Requirements: Requires a 3500/22 Transient Data Interface (TDI) module to function within the rack.
  • Software Versions: Requires 3500 Rack Configuration software version 4.5 or later, and Data Acquisition software version 2.40 or later.
  • Display Modules: If used with the 3500/93 LCD display, firmware revision P or later is required; the 3500/94 VGA display requires revision C or later.
  • Slot Placement: Can be installed in any full-height front slot to the right of the TDI module.
  • Standards: Complies with API 670 standards for machinery protection systems.
Description
The Bently Nevada 3500/32M 149986-02 Spare 4-Channel Relay Control Module is a full-height module designed to provide four independent relay outputs for critical machinery monitoring and control. Each relay is a single-pole double-throw (SPDT) type with epoxy-sealed environmental protection and a standard 250 Vrms arc suppressor. Relays are rated for 100,000 cycles at 5 A, 24 Vdc, or 240 Vac, with each channel switch-selectable for Normally Deenergized or Normally Energized operation. Typical module power consumption is 5.8 watts.

The 3500/32M 149986-02 features multiple LED indicators for clear operational feedback. The OK LED illuminates when the module is functioning properly, the TX/RX LED flashes to indicate proper communications with other rack modules, and the CH ALARM LED illuminates when a relay channel is in an alarm state. These indicators ensure that operators have immediate visual feedback on module status and alarm conditions.

Each output of the 4-Channel Relay Module can be independently programmed to perform voting logic. Integrated Alarm Drive Logic allows programming using AND/OR logic with alert and danger inputs, Not-OK signals, or individual PPLs from any monitor channel or combination of channels in the rack. Configuration is performed via the Bently Nevada 3500 Rack Configuration Software, offering flexible logic implementation to meet diverse operational requirements.

Designed for industrial and power-generation applications, the Bently Nevada 3500/32M 149986-02 combines rugged reliability with high-precision control, providing accurate alarm signaling and machinery protection in demanding environments. Its epoxy-sealed construction, long relay life, and programmable logic make it an essential module for safeguarding rotating and critical equipment.
Alternative Names
35OO/32M 149986-O2 3500/32M I49986-02 3500 32M 149986 02 3500/32 125712-01 3500/33 149986-01 3500/40M 3500/45 176449-04 3500/45 140072-04
Technical notes
The Bently Nevada 3500/32M 149986-02 is a 4-channel relay output module for the 3500 Series Machinery Protection System, providing alarm and trip outputs for critical rotating machinery monitoring . It features four independent relay channels, each with Form C (SPDT) contacts rated at 5A @ 250V AC / 30V DC.
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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 warranty period for Bently Nevada 3500/32M 149986-02?
Apter Power offers a 12-month warranty covering defects and performance issues.
What type of relays are used in the 3500/32M 149986-02 module?
Each relay is a single-pole double-throw (SPDT) type.
How long is the 3500/32M 149986-02 contact life?
Relays are rated for 100,000 cycles at 5 A, 24 Vdc, or 240 Vac.
Can each channel be set to Normally Deenergized or Normally Energized?
Yes, each relay channel is switch-selectable for either mode.