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350033-01-02 149986-01
350033-01-02 149986-01
350033-01-02 149986-01

Bently Nevada 350033-01-02 149986-01 16-Channel Relay Module

  • Model: 3500/33 (350033-01-02 Main Module / 149986-01 Relay Control Card)
  • Brand: Bently Nevada
  • Series: 3500 Series Machinery Protection System
  • Core Function: Provides 16 programmable relay outputs for machinery protection voting and trip logic.
  • Product Type: 16-Channel Relay Control Module with Multiple Agency Approvals (Zone 2/Div 2)
  • Key Specs: 16 SPDT Form C Relays | ATEX/IECEx Zone 2 Certified | Single-Slot Rack Mounting
  • Condition: New Original / New Surplus (Factory Sealed in OEM ESD packaging)
  • Inventory Status: Critical spare stock (Essential for hazardous-area machinery trip interlocks)
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Description

Key Technical Specifications

Parameter Specification
Brand / Manufacturer Bently Nevada (Baker Hughes)
Front Module Part Number 149986-01 (3500/33 Control Module)
Ordering Option Code 350033-01-02 (16-Channel Relay Output Module, Multiple Approvals)
Channel Count 16 independent relay channels
Contact Configuration Single-Pole Double-Throw (SPDT) / Form C electromechanical relays
Contact Rating (Non-Hazardous) 5 A @ 30 V DC, 2 A @ 230 V AC (resistive)
Contact Rating (Zone 2 / Div 2) De-rated to 30 V RMS / 30 V DC max for Class I, Div 2 and Zone 2 compliance
Power Consumption 5.8 W typical backplane power draw
Switching Response Time < 10 ms
Isolation 1,500 V RMS channel-to-channel and channel-to-ground
Hazardous Area Certifications Multiple Approvals option (-02): ATEX/IECEx Zone 2, Class I Div 2
Operating Temperature −30 to +65 °C (−22 to +149 °F)

 

Product Introduction & Supply Chain Strategy

The Bently Nevada 350033-01-02 with 149986-01 control module delivers 16 programmable relay contacts for machinery shutdown sequences in 3500 protection racks. Featuring Option -02 hazardous area certification, it suits dangerous industrial locations requiring ATEX/IECEx Zone 2 or Class I, Division 2 compliance.

Stocking this assembly as New Surplus maintains total continuity while optimizing capital efficiency. It bypasses OEM delivery delays and eliminates the risk of hidden contact oxidation or coil degradation common in refurbished units, ensuring uncompromised trip protection.

 

Installation & Configuration Guide

Stage 1: Pre-Installation (Prep & Safety)

  1. Execute Lock-Out/Tag-Out (LOTO) protocols on external trip contacts and alarm annunciators wired to the 3500/33 module.
  2. Put on a grounded ESD wrist strap attached to the metal frame of the 3500 rack.
  3. Take photos of existing rear wiring connections and document all jumper configurations on the original module.
  4. Verify that the ambient application voltage stays within the 30 V RMS limit required for Zone 2 hazardous area compliance.

Stage 2: Removal

  1. Unplug field wiring headers from the rear termination card.
  2. Loosen the top and bottom thumbscrews on the front 149986-01 module using a flathead screwdriver.
  3. Unlatch the ejector handles to disconnect the card from the 3500 backplane.
  4. Carefully pull the module straight out along the guide rails without damaging edge connectors.

Stage 3: Installation (Clone & Seat)

  1. Set the DIP switches on the new 149986-01 module to match the original unit’s group configuration (Normally Energized vs. Normally De-energized).
  2. Slide the module into the designated rack slot along the card guide rails.
  3. Press firmly until the edge connector fully engages the backplane, close the release levers, and tighten thumbscrews to 0.6 N·m.
  4. Reinstall the terminal headers on the rear I/O card.

Stage 4: Power-On & Testing

  1. Restore rack power and monitor the front panel LEDs: the green OK LED should turn solid within 10 seconds.
  2. Verify communication using Bently Nevada 3500 System Configuration Software.
  3. Conduct a functional contact test on spare channels to verify output response times below 10 ms.
350033-01-02 149986-01
350033-01-02 149986-01
350033-01-02 149986-01
350033-01-02 149986-01

 

Firmware/Software Versions & Upgrade Notes

  • Software Compatibility: Requires Bently Nevada 3500 Rack Configuration Software Version 3.30 or higher.
  • Data Display Integration: Requires 3500 Data Display Software Version 1.40 or higher and Data Acquisition Software Version 2.40 or higher.
  • Hardware Interoperability: Compatible with 3500/20 RIM and 3500/22M TDI modules.
  • Voltage Rating Notice for Multiple Approvals (-02): Module option -02 carries strict voltage restrictions (30 V RMS / 30 V DC max) to maintain Zone 2 and SIL certifications. Do not apply 230 V AC line voltage to an option -02 card; doing so voids the safety certificate.

 

Frequently Asked Questions (FAQ)

What does the “-02” suffix mean on the 350033-01-02 part number?

The “-01” segment specifies the standard 16-Channel Relay Output Module, while the “-02” suffix denotes the Multiple Agency Approvals option (ATEX Zone 2, IECEx, and Class I, Division 2). This option certifies the card for installation in classified hazardous locations, but limits the maximum switching voltage to 30 V RMS / 30 V DC.

Are these 149986-01 units genuine OEM parts?

Yes. We supply New Surplus components originating from canceled industrial projects and system integrator surplus inventory. Each card is an authentic Bently Nevada module in original factory packaging, verified to ensure zero wear on backplane pins and zero previous installation.

Why shouldn’t we buy refurbished 3500/33 relay cards for critical turbomachinery?

Refurbished relay cards often suffer from invisible internal issues like pitted contact surfaces, weakened relay coils, or degraded arc suppressors. If a relay fails to close during an overspeed or high-vibration event, the resulting mechanical damage can run into millions of dollars. New Surplus provides original factory reliability at a fraction of the list price.

Can I configure individual relays for Normally Energized (NE) or Normally De-energized (ND) modes?

The 16 relay channels on the 3500/33 are arranged in four groups of four channels. Each four-channel group is switch-selectable on the board for Normally Energized or Normally De-energized operation. Individual relay voting logic (AND/OR logic) is programmed via the 3500 Rack Configuration Software.

Can this module be hot-swapped during online operation?

Yes, 3500/33 modules support hot-swapping. However, removing a relay module will change the state of outputs tied to machine trip circuits. You must bypass external trip logic in your plant control system before extracting or inserting the module to prevent unwanted plant trips.

What warranty coverage comes with this New Surplus card?

All 350033-01-02 / 149986-01 units include a full 1-year replacement warranty, complete serial number traceability, and ESD inspection verification.

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