Bently Nevada 3500/33-149986-01 – 4-Channel Relay Output Module | 3500 Series Machinery Protection System
Engineering Background
The Bently Nevada 3500 Series is the industry-standard platform for continuous machinery protection in rotating equipment applications worldwide. Deployed across power generation, oil & gas, petrochemical, and heavy industrial facilities, the 3500 rack architecture provides modular, scalable vibration and process monitoring with SIL-rated relay outputs for trip and alarm logic. The 3500/33 Relay Output Module (P/N 149986-01) is the dedicated relay interface card within this platform, translating monitor logic states into hardwired relay contacts for integration with DCS, PLC, and ESD systems.
Product Positioning
The 3500/33-149986-01 is engineered for procurement engineers and reliability teams requiring a certified, drop-in replacement or spare for existing 3500 rack installations. Konmask.com supplies this module from verified inventory with full traceability, supporting both planned maintenance and emergency shutdown scenarios.
Complete Technical Specifications
| Part Number | 149986-01 |
| Model / SKU | 3500/33-149986-01 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Platform | 3500 Series Machinery Protection System |
| Module Type | Relay Output Module |
| Relay Channels | 4 independent relay outputs |
| Relay Type | Form C (SPDT) electromechanical relays |
| Contact Rating | 5 A @ 250 VAC / 30 VDC (resistive load) |
| Operating Voltage | 18–32 VDC (rack-supplied) |
| Rack Compatibility | 3500/20 Rack Interface Module required |
| Communication | Internal rack backplane bus |
| Operating Temperature | 0°C to +65°C |
| Storage Temperature | -40°C to +85°C |
| Humidity | 5–95% RH, non-condensing |
| Weight | 760 g |
| Certifications | CE, CSA, FM (Class I Div 2) |
| Country of Origin | United States |
Proven Application Environments
- Power Generation: Steam turbine and gas turbine trip relay integration with DCS trip logic
- Oil & Gas: Compressor and pump protection relay outputs for ESD and F&G systems
- Petrochemical: Reactor agitator and extruder machinery protection relay wiring
- Marine & Offshore: Propulsion shaft and auxiliary machinery monitoring relay outputs
- Pulp & Paper / Mining: Critical rotating equipment alarm and trip relay circuits
Engineering Advantages
- Direct Rack Compatibility: Plug-in replacement for any 3500 Series rack slot designated for relay output — no firmware reconfiguration required
- Hardwired Relay Contacts: Provides galvanically isolated, voltage-free contacts for fail-safe integration with third-party safety systems
- 4-Channel Density: Consolidates four independent relay circuits in a single module slot, reducing rack space and wiring complexity
- Form C Architecture: Supports both normally-open (NO) and normally-closed (NC) wiring configurations for alarm and trip logic
- Hazardous Area Rated: FM Class I Division 2 certification supports installation in classified electrical areas without additional barriers
System Architecture & Signal Flow
Within the 3500 rack, monitor modules (e.g., 3500/40M, 3500/42M, 3500/45) evaluate transducer signals against configured alarm and danger setpoints. When a setpoint is exceeded, the rack’s internal logic bus asserts a relay drive signal to the 3500/33 module. The 3500/33-149986-01 converts this logic state to a hardwired relay contact closure or opening, which is then wired to the plant DCS, PLC safety layer, or ESD panel. The module supports both latching and non-latching relay configurations via rack software (System 1 / Rack Configuration Software).
Sourcing & Quality Verification
- All units sourced from authorized distribution channels or verified surplus with documented chain of custody
- Pre-shipment inspection: visual, label verification (P/N 149986-01 confirmed), and functional relay contact continuity test
- Original manufacturer packaging preserved where available; anti-static ESD packaging applied for all shipments
- Counterfeit-risk mitigation: serial number cross-reference and physical marking authentication performed on every unit
- Certificate of conformance (CoC) available upon request for regulated procurement processes
Procurement Process
- Confirm compatibility: Verify your 3500 rack firmware version and slot assignment with your site’s rack configuration file before ordering
- Request quote: Contact support@konmask.com with quantity, required delivery date, and any CoC or test report requirements
- Order confirmation: Lead time typically 1–3 business days for in-stock units; expedited shipping available for emergency shutdowns
- Shipping: DHL / FedEx international express with full tracking; export documentation (commercial invoice, packing list, HS code 8537.10) included
- After-sales: 12-month warranty against manufacturing defects; technical support available via email or phone
Technical FAQ
Q: Is the 3500/33-149986-01 compatible with all 3500 rack sizes?
A: Yes. The module is compatible with all standard 3500 rack configurations (3-slot, 7-slot, 14-slot) provided a 3500/20 Rack Interface Module is installed.
Q: Can this module be used as a hot-swap replacement?
A: The 3500 Series supports online module replacement in most configurations. Consult your site safety procedures and Bently Nevada documentation (GEK-91485) before performing live rack maintenance.
Q: What is the difference between 149986-01 and other 3500/33 part number suffixes?
A: The -01 suffix designates the standard relay output configuration. Other suffixes may indicate different contact ratings or agency certifications. Always specify the full P/N when ordering.
Q: Do you provide functional test reports?
A: Yes, functional test reports and CoC documents are available upon request at time of order. Please specify requirements in your inquiry.
Q: What is the typical lead time for emergency orders?
A: In-stock units can ship within 24 hours of order confirmation. Contact us directly at +0086 19859288691 for urgent requirements.
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Contact: support@konmask.com | +0086 19859288691
