Description
1. At-A-Glance Executive Brief
- Model: 149986-01 (3500/33 Module)
- Brand: Bently Nevada (Baker Hughes)
- Part Type: Spare 16-Channel Relay Control Module (Front Card)
- Lifecycle Status: Active / Legacy System Compatible
- System Compatibility: Bently Nevada 3500 Machinery Protection System Racks
- Weight: 0.7 kg
2. Technical Introduction
Critical rotating machinery protection demands fast, dependable trip logic to prevent catastrophic failure during abnormal vibration spikes. The Bently Nevada 149986-01 acts as the front-board component for the 3500/33 16-channel relay module, providing independent programmable relay outputs linked directly to the rack backplane.
Maintenance engineers integrate this card into 3500 racks to route alarm and danger statuses to external shutdown solenoids, PLCs, or emergency trip systems. When aging legacy cards exhibit intermittent channel latching or communication errors with the rack configuration software, swapping this unit restores precise alarm routing and system reliability.
Engineer’s Takeaway: Always verify that the corresponding rear I/O module (such as the 149992-01) matches revision requirements before hot-swapping or commissioning this front card in an active rack.
3. Core Technical Specifications
| Parameter | Specification |
| Manufacturer | Bently Nevada (Baker Hughes) |
| Series | 3500 / 3500/33 |
| Number of Channels | 16 independent relay channels |
| Relay Contact Type | Form C (SPDT) dry contact outputs |
| Contact Rating | 5 A @ 30 VDC / 2 A @ 230 VAC |
| Response Time | <10 ms |
| Rack Power Source | Derived directly from 3500 rack power supply bus |
| Operating Temperature | -30°C to +65°C |
4. Field Engineer’s Tech Notes
- Terminal Block & Field Wiring Verification: The 149986-01 relies on a paired rear barrier or Euro-style terminal module for physical field wiring. Double-check terminal torques during installation; loose wire terminations subjected to continuous turbine or compressor vibration will trigger false trip signals.
- Fail-Safe vs. Non-Fail-Safe Logic: Configure individual channel programming via the 3500 Rack Configuration Software with operational safety in mind. Ensure logic settings match plant safety instrumented system (SIS) standards regarding loss of rack power scenarios.
5. Adaptive QA & Testing Protocol
Every pre-owned or New Surplus (NSFP) 149986-01 module undergoes bench validation in a live 3500 test rack prior to dispatch. Technicians execute a full relay actuation sequence across all 16 channels, verifying correct LED status indication, backplane handshaking, and contact closure resistance under simulated trip commands. Inspection logs and functional test videos are available upon request for quality assurance validation.
6. Buyer’s FAQ
- What condition is this module supplied in? We inventory factory-sealed New Surplus (NSFP) as well as fully bench-tested refurbished units. Condition status is clearly stated on every official quote.
- What warranty coverage is included? All units are backed by a standard 12-month replacement warranty from the date of invoice.
- How quickly can you ship for emergency outages? We offer immediate same-day dispatch from our active stock to minimize expensive facility downtime.
- Does this include the rear termination card? The 149986-01 designation represents the front module card. Please specify if your application requires the matching rear I/O back card (such as the 149992-01) for a complete drop-in assembly.
