Genuine BENTLY NEVADA 3500/32M 149986-02 3500 Series - Industrial Automation Part

BENTLY NEVADA 3500/32M 149986-02 3500 Series - Front Panel and Connectivity View

BENTLY NEVADA 3500/32M 149986-02 3500 Series - Technical Label and Specifications

Bently Nevada 3500/32M 149986-02 | 4-Channel Relay Module | 3500 Series

SKU: 3500/32M 149986-02 Category: Bently Nevada Tags: 3500-series, bently-nevada, PLC module, relay-module, vibration-monitoring

Description

Bently Nevada 3500/32M 149986-02 – 4-Channel Relay Output Module | 3500 Machinery Protection System

Engineering Background: The Bently Nevada 3500 Series is the industry-standard platform for continuous machinery protection in rotating equipment applications. Deployed across turbines, compressors, pumps, and generators worldwide, the 3500 rack-based architecture provides real-time vibration, position, and process monitoring with deterministic relay output response. The 3500/32M module occupies a dedicated relay output slot within the 3500 rack and serves as the final protective element — translating monitor alarm states into hardwired relay contacts that drive shutdown logic, annunciator panels, and DCS/PLC interlock inputs.

Product Positioning: The 3500/32M (Part No. 149986-02) provides four independently configurable relay channels, distinguishing it from the 2-channel 3500/33 and the voting-logic-oriented 3500/34 within the same series. The -02 revision designates the enhanced firmware baseline with improved relay response timing and expanded configuration options via System 1 / Rack Configuration Software. This module is the correct selection when four discrete relay outputs are required from a single slot — typical in applications where multiple alarm tiers (Alert, Danger, OK) must drive separate field devices without consuming additional rack slots.

Complete Technical Specifications

Electrical

Number of Relay Channels: 4 (independently configurable)
Relay Type: Form C (SPDT) dry contact
Contact Rating: 5 A @ 250 VAC / 30 VDC (resistive load)
Minimum Switching Load: 10 mA @ 5 VDC
Relay Response Time: <100 ms from monitor alarm to contact state change
Relay Drive: Energize-to-trip or de-energize-to-trip (software configurable)
Power Consumption: ≤3 W (from 3500 rack backplane, +5 VDC / +24 VDC)
Isolation: Relay contacts isolated from backplane logic (1500 VAC dielectric)

Mechanical

Form Factor: Single-slot 3500 rack module
Dimensions: Standard 3500 series card (fits all 3500 rack sizes)
Weight: 740 g (module with front panel)
Connector: Rear I/O via 3500 rack terminal block (field wiring at rack rear)
Front Panel: LED status indicators per channel (Relay Energized / De-energized)

Environmental

Operating Temperature: 0°C to +60°C
Storage Temperature: -40°C to +85°C
Relative Humidity: 5% to 95% non-condensing
Vibration (Operating): 0.21 g RMS, 5–500 Hz (IEC 60068-2-6)
Shock: 15 g, 11 ms half-sine (IEC 60068-2-27)
Altitude: Up to 2000 m without derating

Certifications

CE Marking: EMC Directive 2014/30/EU
UL Listed: UL 508 (Industrial Control Equipment)
SIL Capable: Suitable for use in SIL 1/2 safety loops per IEC 61508 (system-level assessment required)
RoHS Compliant: Directive 2011/65/EU

Specification data sourced from Bently Nevada 3500/32M Product Datasheet (GEK-91485) and 3500 Rack Configuration Software documentation. Verify against current revision for safety-critical applications.

Proven Application Environments

Petrochemical / Steam Turbine Trains: Driving ESD solenoid valves on high-pressure steam turbines during overspeed or high-vibration events; relay contacts wired in series with turbine trip logic for fail-safe de-energize-to-trip operation.
Power Generation / Gas Turbines: Annunciator panel alarm activation on Frame 5/6/7 gas turbines; four relay channels map to Alert, Danger, OK, and Bypass states for operator situational awareness at the control room panel.
LNG / Centrifugal Compressor Trains: Interlocking with DCS (Honeywell Experion, Emerson DeltaV) via hardwired relay contacts; relay output confirms monitor health status to the safety instrumented system before permitting compressor start.
Water Treatment / Large Pump Stations: Bearing vibration alarm relay driving local audible/visual alarm and remote SCADA digital input; de-energize-to-trip configuration ensures alarm activation on power loss to the monitoring rack.
Offshore Platform / Rotating Equipment: Marine-grade installation in hazardous area control rooms; relay module mounted in pressurized enclosure with 3500 rack, contacts wired to platform ESD matrix for compressor and pump protection.
Steel / Heavy Industry / Rolling Mill Drives: Motor bearing protection on large induction motors driving rolling mills; relay contacts connected to motor protection relay (Schweitzer SEL-710) auxiliary input for coordinated trip logic.

Engineering Advantages

For applications requiring fail-safe shutdown logic, this relay module supports de-energize-to-trip configuration, because the relay coil is de-energized on alarm — ensuring the contact opens and drives the trip circuit even on module power loss.
For multi-tier alarm architectures (Alert / Danger / OK / Bypass), this relay module provides four independent channels in a single rack slot, because each channel maps to a discrete monitor alarm state without requiring additional modules or external relay panels.
For SIL-rated safety loops, this relay module is suitable for SIL 1/2 system-level assessments, because the relay contact isolation (1500 VAC dielectric) and deterministic response time (<100 ms) meet IEC 61508 architectural constraints for final elements.
For DCS/PLC interlock integration, this relay module provides dry Form C contacts, because hardwired dry contacts are universally compatible with digital input cards from Honeywell, Emerson, ABB, Siemens, and Yokogawa without signal conditioning.
For hot-standby redundant rack configurations, this relay module supports online replacement without rack power-down, because the 3500 rack architecture allows module swap with the rack energized when the monitor channel is placed in bypass mode first.
For long-term asset lifecycle management, this relay module carries a stable Bently Nevada part number (149986-02) with documented backward compatibility across 3500 rack generations, because the backplane interface and firmware protocol have remained consistent across production revisions.

System Architecture & Signal Flow

Signal Flow: Vibration/position transducer → 3500 monitor module (e.g., 3500/42M, 3500/45, 3500/50) → backplane alarm bus → 3500/32M relay module → Form C dry contact output → field wiring to ESD solenoid / DCS DI card / annunciator panel.

Compatible Monitor Modules (same 3500 rack):

3500/42M (176449-01/02) – Proximitor/Seismic Monitor: most common pairing; relay channels map to channel 1–4 alarm states
3500/45 – Position Monitor: relay outputs for axial position Alert/Danger on thrust bearings
3500/50 – Tachometer Module: overspeed relay output via 3500/32M contacts
3500/53 – Overspeed Detection System: relay module provides redundant trip output contacts
3500/22M – Transient Data Interface: relay channels used for event-triggered alarm annunciation

Substitution Conditions: The 3500/32M (149986-02) can replace earlier -01 revision units directly; the -02 revision is backward compatible at the rack slot and configuration software level. The 3500/33 (2-channel) is not a drop-in substitute when four relay outputs are required. Cross-platform substitution with 3300 series relay modules is not supported due to incompatible backplane pinout.

Sourcing & Quality Verification

Units offered through Konmask.com are sourced from decommissioned plant upgrades, authorized distributor overstock, and verified secondary market channels. Each unit undergoes the following verification process before listing:

Visual & Mechanical Inspection: Front panel, connector pins, PCB (where accessible), and label integrity checked against known-good reference units. Counterfeit indicators (label font, part number format, connector plating) are verified.
Functional Bench Test: Module installed in a 3500 test rack; relay channels exercised via Rack Configuration Software; contact continuity and switching confirmed on all four channels.
Firmware Revision Check: Firmware version read via System 1 software and documented; -02 revision confirmed against Bently Nevada revision history.
Packaging & ESD Protection: Shipped in anti-static bag with foam insert; humidity indicator card included for long-distance shipments.

Documentation available upon request: Functional test report, high-resolution photos (all six sides), firmware revision screenshot, original datasheet (GEK-91485), and certificate of conformance.

Procurement Process

Inquiry Submission: Submit part number, required quantity, and delivery timeline via the contact form or directly to support@konmask.com. Include rack configuration details if compatibility verification is needed.
Quote & Stock Confirmation: A response with confirmed stock status, unit condition report, and CIF/EXW pricing is provided within 24 hours on business days. Expedited response available for shutdown-critical requirements.
Order & Shipment: Payment confirmed → unit re-inspected and photographed → shipped via DHL/FedEx with tracking. Export documentation (commercial invoice, packing list, COO) provided for customs clearance. Technical support available post-delivery for installation and configuration questions.

Technical Support Types Available: Rack slot compatibility confirmation, Rack Configuration Software parameter guidance, replacement cross-reference verification, and field wiring diagram review.

Technical FAQ

Q: Is the 3500/32M 149986-02 compatible with both the 3500 standard rack and the 3500 TMR (Triple Modular Redundant) rack?
A: The 3500/32M is designed for the standard 3500 rack architecture. In TMR configurations, relay voting logic is typically handled by the 3500/34 TMR Relay Module, which implements 2-of-3 voting at the module level. The 3500/32M can be used in a TMR rack for non-voted alarm annunciation outputs, but should not replace the 3500/34 in the primary trip path of a TMR system without a system-level safety review.

Q: Can the 3500/32M 149986-02 substitute for the 3500/32 (without the M suffix)?
A: The 3500/32M is the current production revision of the 3500/32 family. The M suffix denotes the modernized hardware revision with updated relay components and expanded firmware. The 149986-02 is backward compatible with racks previously running the 3500/32 (non-M) in the same slot position, provided the Rack Configuration Software is updated to recognize the -02 part number. No backplane wiring changes are required.

Q: What certifications apply when using the 3500/32M in a SIL 2 safety instrumented function?
A: The 3500/32M relay contacts are suitable for use as the final element in a SIL 1 or SIL 2 safety instrumented function, subject to a system-level SIL verification per IEC 61511. The module itself does not carry a standalone SIL certificate — SIL suitability is determined at the safety loop level, incorporating the PFD (Probability of Failure on Demand) of the complete sensor-logic-final element chain. Functional safety documentation (FMEDA data) is available from Bently Nevada for inclusion in the SIL assessment.