Bently Nevada 3500/32M 149986-02B – 16-Channel Relay Output Module | 3500 Series Machinery Protection System
Engineering Background
The Bently Nevada 3500 Series is the industry-standard platform for continuous online machinery protection, widely deployed across rotating equipment in oil & gas, power generation, petrochemical, and heavy industrial facilities. The 3500/32M Relay Module (Part No. 149986-02B) is a critical output interface card within the 3500 rack architecture, providing hardwired relay contacts for alarm and trip logic execution.
Product Positioning
Designed for procurement engineers and reliability teams requiring a verified, drop-in replacement or expansion relay output module for existing 3500 Series protection racks. The 149986-02B variant supports 16 independent relay channels with configurable normally-open (NO) and normally-closed (NC) contacts, enabling direct integration with plant DCS, ESD, and PLC safety layers.
Complete Technical Specifications
| Manufacturer | Bently Nevada (GE Measurement & Control / Baker Hughes) |
| Part Number | 149986-02B |
| Model | 3500/32M |
| Module Type | Relay Output Module |
| Series / Platform | Bently Nevada 3500 Machinery Protection System |
| Relay Channels | 16 independent relay outputs |
| Contact Configuration | Form C (SPDT) — NO / NC selectable per channel |
| Contact Rating | 5 A @ 250 VAC / 30 VDC (resistive load) |
| Relay Type | Electromechanical, latching / non-latching configurable |
| Power Supply | Supplied via 3500 rack backplane (no external PSU required) |
| Communication | Rack backplane bus (proprietary Bently Nevada protocol) |
| Module Format | Single-slot 3500 rack card |
| Operating Temperature | 0 °C to +65 °C |
| Storage Temperature | -40 °C to +85 °C |
| Humidity | 5% to 95% RH, non-condensing |
| Weight | 740 g |
| Approvals / Compliance | CE, SIL-capable (per system-level SIL assessment) |
| Firmware / Configuration | Configured via Bently Nevada System 1 / Rack Configuration Software |
Proven Application Environments
- Gas turbine and steam turbine protection racks (trip relay output)
- Centrifugal compressor and reciprocating compressor monitoring systems
- Pump and motor protection panels in upstream/downstream oil & gas
- Power plant auxiliary machinery protection (BOP systems)
- Petrochemical plant rotating equipment safety shutdown systems
- LNG terminal and refinery critical machinery protection
- Marine propulsion and offshore platform machinery monitoring
Engineering Advantages
- Direct rack compatibility: Plug-and-play replacement within any standard 3500 Series rack — no hardware modification required.
- High channel density: 16 relay outputs per single rack slot minimizes rack space consumption in dense protection architectures.
- Flexible contact logic: Per-channel NO/NC selection and latching/non-latching configuration supports diverse trip and alarm logic requirements.
- Hardwired safety output: Relay contacts provide galvanically isolated, hardwired trip signals independent of communication bus integrity.
- Long service life: Electromechanical relay design rated for high cycle life; suitable for both continuous monitoring and periodic test-trip applications.
- System 1 integration: Full configuration and diagnostics via Bently Nevada System 1 software for centralized asset management.
System Architecture & Signal Flow
Within the 3500 rack, the 3500/32M Relay Module receives processed alarm and trip logic signals from monitor modules (e.g., 3500/40M, 3500/42M, 3500/45) via the rack backplane. Each relay channel maps to a configurable setpoint output — Alert, Danger, or custom logic — and drives hardwired contacts to field devices including solenoid valves, ESD panels, DCS digital inputs, and annunciator systems. The module supports both energize-to-trip (ETT) and de-energize-to-trip (DTT) wiring philosophies.
Sourcing & Quality Verification
- All units sourced from verified industrial surplus, OEM-authorized channels, or controlled decommissioning projects.
- Each module undergoes incoming inspection: visual check, label/part number verification, and functional bench test where applicable.
- Original firmware and configuration integrity preserved; no unauthorized modifications.
- Packaging: anti-static ESD bag + foam-lined carton; humidity indicator card included for long-haul shipments.
- Traceability documentation available upon request (test records, photos, chain-of-custody).
Procurement Process
- Submit RFQ: Contact support@konmask.com with your required quantity, delivery timeline, and any certification requirements.
- Quotation: Receive itemized quote with unit price, lead time, and shipping options within 1 business day.
- Order Confirmation: Purchase order accepted via email; proforma invoice issued for prepayment or NET terms (qualified accounts).
- Shipment: DHL / FedEx / UPS express worldwide; EXW Xiamen or CIF destination available. Typical dispatch: 1–3 business days after payment confirmation.
- After-Sales: 90-day warranty on verified units; technical support available for installation and configuration queries.
Technical FAQ
- Q: Is the 149986-02B compatible with all 3500 rack sizes?
- A: Yes. The 3500/32M is compatible with 3500 Series 4-slot, 8-slot, and 14-slot racks. Verify rack backplane revision with your system documentation.
- Q: Can this module replace the 149986-01 or 149986-02 (non-B suffix)?
- A: The -02B suffix denotes a hardware revision. Functional compatibility with earlier revisions is generally maintained, but confirm with your Bently Nevada system documentation or contact our technical team before substitution.
- Q: Does the module require reconfiguration after installation?
- A: Configuration is stored in the rack’s System Monitor module. A replacement 3500/32M will adopt the existing rack configuration automatically upon insertion if the rack System Monitor is intact. Full recommissioning is recommended per site procedures.
- Q: What is the lead time for this part?
- A: Subject to stock availability. Contact us for real-time inventory status. Express delivery to most destinations within 3–7 business days.
- Q: Do you provide a Certificate of Conformance (CoC)?
- A: Yes. CoC and inspection reports are available upon request for all verified units.
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