Bently Nevada 149992-03 Channel Relay Module | 3500 Series Machinery Protection
Engineering Background
The Bently Nevada 3500 Series is the industry benchmark for continuous online machinery protection, deployed across turbines, compressors, pumps, and rotating equipment in oil & gas, power generation, and petrochemical facilities worldwide. The 149992-03 Channel Relay Module is a critical output interface within the 3500 rack architecture, translating monitored parameter alarms into discrete relay contact closures that drive shutdown logic, DCS inputs, and annunciator panels.
Product Positioning
Konmask.com supplies the 149992-03 as verified surplus and new-surplus stock, providing procurement engineers with a reliable, cost-effective alternative to OEM lead times. Each unit is inspected, function-tested, and shipped with full traceability documentation. This module is a direct form-fit-function replacement for installed 3500 Series racks without requiring rack reconfiguration or firmware changes.
Complete Technical Specifications
| Part Number | 149992-03 |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Series / Platform | 3500 Machinery Protection System |
| Module Type | Channel Relay Output Module |
| Relay Channels | 4 independent relay output channels |
| Contact Configuration | SPDT (Form C) per channel |
| Contact Rating | 5 A @ 250 VAC / 30 VDC (resistive load) |
| Relay Type | Electromechanical, latching / non-latching configurable |
| Rack Compatibility | 3500/20 Rack Interface Module (RIM) based racks |
| Backplane Interface | 3500 Series proprietary backplane bus |
| Power Supply | Supplied via rack backplane (no external wiring required) |
| Operating Temperature | 0 °C to +60 °C |
| Storage Temperature | -40 °C to +85 °C |
| Humidity | 5% to 95% RH, non-condensing |
| Weight | 510 g (approx.) |
| Certifications | CE, cULus (per 3500 Series platform) |
| Country of Origin | USA |
Proven Application Environments
- Oil & Gas: Upstream compressor trains, gas turbine protection racks, pipeline booster stations
- Power Generation: Steam turbine trip relay interfaces, generator protection panels
- Petrochemical / Refining: Reactor feed pump protection, critical rotating equipment SIS integration
- LNG / FPSO: Offshore machinery protection systems requiring SIL-rated relay outputs
- Industrial Utilities: Large HVAC compressors, cooling water pump protection
Engineering Advantages
- Direct Rack Replacement: Plug-in compatible with all 3500 Series racks — no re-engineering, no firmware update, no rack downtime beyond module swap
- Configurable Relay Logic: Supports energize-to-trip (ETT) and de-energize-to-trip (DTT) wiring philosophies via jumper/software configuration
- Isolated Contacts: Each relay channel is electrically isolated, preventing ground loops between DCS, ESD, and annunciator circuits
- High Contact Reliability: Gold-flashed contacts rated for low-level signal switching as well as full load switching
- Redundancy Support: Compatible with 3500 Series dual-rack redundancy configurations
- Minimal Maintenance: Solid-state drive circuitry with electromechanical output contacts — combines reliability of both technologies
System Architecture & Signal Flow
Within the 3500 rack, monitor modules (e.g., 3500/40M, 3500/42M, 3500/45) evaluate transducer signals against configured alarm setpoints. When an Alert or Danger threshold is crossed, the rack’s internal alarm bus asserts the corresponding relay drive signal. The 149992-03 Channel Relay Module receives these drive signals via the backplane and closes or opens the appropriate SPDT contact output. Field wiring from the relay terminal block connects to the plant DCS discrete input, ESD/SIS logic solver, or local annunciator panel. The module supports both normally-energized (fail-safe) and normally-de-energized wiring topologies.
Sourcing & Quality Verification
- Stock Condition: New-surplus and refurbished units available; condition disclosed per order
- Inspection Protocol: Visual inspection, contact resistance measurement, functional relay actuation test, backplane connector integrity check
- Traceability: Serial number recorded; original OEM labeling intact where available
- Packaging: Anti-static bag + foam-lined carton; humidity indicator card included for long-haul shipments
- Warranty: 12-month Konmask operational warranty against manufacturing defects
- Counterfeit Mitigation: All units sourced from documented supply chains; OEM markings verified against Bently Nevada part number databases
Procurement Process
- Submit Inquiry: Email support@konmask.com with part number 149992-03, required quantity, and delivery timeline
- Quotation: Receive itemized quote with unit price (HKD/USD), lead time, and stock condition within 1 business day
- Order Confirmation: Approve proforma invoice; payment via T/T bank transfer or approved credit terms
- Inspection & Dispatch: Unit tested, photographed, and shipped with packing list + test record
- Delivery: DHL / FedEx express (3–7 business days globally); sea freight available for bulk orders
- After-Sales: Technical support available for installation verification and rack configuration queries
Technical FAQ
Q: Is the 149992-03 compatible with both 3500/20 and 3500/20E rack interface modules?
A: Yes. The module is compatible with all standard 3500 Series rack configurations using the 3500/20 RIM backplane architecture.
Q: Can relay logic (ETT vs DTT) be changed in the field?
A: Yes. Relay trip logic is configurable via Bently Nevada System 1 / Rack Configuration Software without hardware modification.
Q: What is the minimum order quantity?
A: Single-unit orders are accepted. Volume pricing is available for orders of 3 units or more.
Q: Do you provide a certificate of conformance (CoC)?
A: Yes. A Konmask CoC is provided with every shipment. OEM CoC is available where original documentation accompanies the unit.
Q: Can this module be used in SIL-rated safety loops?
A: The 3500 Series platform carries SIL 2 capability per IEC 61511. Consult your functional safety engineer for loop-level SIL verification requirements.
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