WhatsApp: +86 16626708626
Email: 
Phone: +86 16626708626Description
Key Technical Specifications
| Parameter | Value |
|---|---|
| Part Number | 3500/32 (350032) — full designator format: 3500/32-AA-BB |
| Manufacturer | Bently Nevada |
| Series | 3500 Machinery Condition Monitoring |
| Module Type | 4-Channel Relay Output Module |
| Relay Contact Type | SPDT (single-pole, double-throw) |
| Power Consumption | 5.8 W typical |
| Operating Temperature | -30°C to +65°C (-22°F to +150°F) |
| Storage Temperature | -40°C to +85°C |
| Humidity | Up to 95%, non-condensing |
| Sealing | Epoxy-sealed relay assembly |
| Rack Space Required | 1 full-height front slot + 1 full-height rear I/O slot |
| Status Indicators | OK LED, TX/RX LED, CH ALARM LED (per channel) |
| Programming | Voting logic + Alarm Drive Logic (AND/OR) via 3500 Rack Configuration Software |
| Agency Approval Options | 00 = None, 01 = CSA/NRTL/C (Class I, Div 2), 02 = ATEX/IECEx/CSA (Class I, Zone 2) |
| Reference Datasheet | Document 141533 (Rev. R/T), 3500/32M 4-Channel Relay Module Datasheet |
| Related User Guide | Document 129771 — 3500/32, 3500/32M & 3500/34 TMR Relay Modules User Guide |
Product Introduction
The Bently Nevada 3500/32 is a 4-channel relay output module built for the 3500 Machinery Condition Monitoring System, the rack-based protection platform used across gas and steam turbines, compressors, generators, and other rotating equipment under API 670 guidelines. It mounts in any slot to the right of the Transient Data Interface Module and drives independent alarm and shutdown relays off Alert, Danger, Not-OK, or individual PPL statuses from any monitor channel in the rack.
Each output channel is separately programmable for voting logic through the 3500 Rack Configuration Software, which lets a plant standardize alarm response across multiple monitor types without rewiring. The module ships in epoxy-sealed construction rated for -30 to +65°C service, and is available with CSA or ATEX/IECEx approval options for hazardous-area installations — a detail worth checking against your site classification before you order.
3500/32
3500/32
Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to This Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No OK LED illuminated | Loss of rack power or backplane fault | ❌ Low | Verify 3500/15 power supply output and rack backplane voltage | Check power supply and rack wiring before replacing this module |
| CH ALARM LED stuck on for one channel | Relay coil failure or stuck contact | ✅ High | Cycle the channel’s programmed logic in the config software; check for continuity across relay contacts | Module replacement is likely required for that channel |
| TX/RX LED not flashing | Backplane communication fault | ⚠️ Medium | Reseat the module; check adjacent modules for the same symptom | If other modules also lose comms, suspect the rack/TDI, not this module |
| Relay fails to actuate on alarm condition | Programming/voting logic misconfiguration | ❌ Low | Re-verify Alarm Drive Logic setup in 3500 Rack Configuration Software | Reprogram before assuming hardware failure |
| Module won’t seat / connector mismatch | Wrong PWA revision or I/O module mismatch | ✅ High | Confirm exact PWA number (125712-01, -01J, -01M) against rack slot assignment | Match revision exactly; do not force-fit a different rear I/O module |
If the fault persists after these checks, contact technical support with the module’s PWA number, a photo of the LED status pattern, and the diagnostic buffer log from the 3500 Rack Configuration Software.
Frequently Asked Questions
Is the 3500/32 hot-swappable? Yes — the 3500 rack architecture is designed for online replacement of monitor and relay modules without shutting down the rack. That said, pull and seat the module deliberately, and confirm your site’s change-management procedure allows a live swap on a system tied to shutdown logic.
Will my programmed voting logic survive a module swap? No, the alarm drive and voting logic configuration lives in the rack’s configuration database, not on the relay module itself. After a hardware swap, reload or re-verify the configuration through the 3500 Rack Configuration Software before returning the channel to service.
What’s the difference between 3500/32 and 3500/32M? The “M” designation typically indicates a later hardware revision of the same 4-channel relay function. They’re documented together in the same user guide (129771) and datasheet family, but confirm PWA number compatibility with your existing rack before substituting one for the other.
Why is this priced below a factory quote from GE Vernova? This is a surplus/secondary-market unit, not a new factory order through the OEM channel. It carries no OEM manufacturer warranty by default — check the listing’s stated condition and warranty terms, since surplus stock is typically sold “as-is” or with a seller-backed warranty rather than an OEM one.
Can I use a CSA-rated unit where ATEX certification is required, or vice versa? No. The agency approval option (00/01/02) is set at the factory and tied to the physical hardware’s certification. Verify the “-BB” suffix on the nameplate matches your site’s hazardous-area classification before installing — this isn’t something you can change after the fact.
Is this part still in active production? The 3500 platform has a long service life, but individual module revisions age out over time. Confirm current lifecycle/support status with GE Vernova (successor to Bently Nevada’s monitoring business) if this module is going into a new installation rather than a spares replacement.
Does this module require a specific rear I/O module to function? Yes — the 4-Channel Relay Module pairs with a rear-mounted I/O module in the corresponding rear slot. Confirm you’re ordering the matching I/O piece (or already have one installed) rather than assuming the front relay module works standalone.
