Key Technical Specifications
- Product Model: 3500/22M (138607-01)
- Manufacturer: Bently Nevada
- Application System: 3500 rotating machinery vibration and protection rack
- Mandatory Slot: Slot 1, adjacent to rack power supply
- Power Source: 24 VDC backplane, max power draw 10.2 W
- Front Ports: USB‑B local configuration, 10/100BASE-TX RJ45 Ethernet
- Transient Sampling Rate: Up to 64 kHz per active measurement channel
- Supported Protocols: Modbus TCP, EGD, SNTP, proprietary 3500 backplane bus
- Operating Temperature: -30 °C to +65 °C
- Isolation: 1500 VAC galvanic separation between front I/O and rack backplane
- Form Factor: Single-width 3500 rack card
- Relay Output: Integrated rack OK relay, 5A @ 24 VDC / 120 VAC
- Compliance: API 670, CE EMC, UL Class I Div 2
Product Introduction
This Bently Nevada 3500/22M TDI module acts as the main rack gateway for 3500 machinery protection hardware. It collects steady-state and transient waveform data for System 1 condition monitoring software. Protection relay paths operate independently of this card. It captures high-speed vibration snapshots, with sampling up to 64 kHz, while allowing local rack configuration via the front USB port.
Installation & Configuration Guide
Preparation (10 min) Gather ESD wrist strap, USB configuration cable, Ethernet patch cord, multimeter. Lock out rack power. Photograph existing module and wiring before removal. Removal (5–10 min) Confirm rack power de-energized. Unplug USB and Ethernet cables. Release the front panel key lock. Pull the extraction levers to disengage the card from the backplane. Installation (10 min) Insert replacement card into slot 1 only. Push extraction levers to seat backplane connector. Lock front key. Reconnect USB and Ethernet cables. Power-On & Test (10 min) Restore rack DC power. Verify OK and CONFIG OK LEDs illuminate. Connect via USB to load or verify rack configuration. Trigger a transient capture test to confirm waveform upload.
Troubleshooting Quick Reference
| Symptom | Likely Cause | Check Action |
|---|---|---|
| CONFIG OK LED off | Invalid or missing rack configuration | Reload 3500 project file; verify module firmware match |
| No Ethernet connection | Wrong IP, cable fault or disabled port | Ping assigned static IP; inspect RJ45 pins |
| Waveform snapshots fail to upload | Missing channel enable license | Confirm transient capture authorization loaded in rack config |
| OK relay continuously de-energized | Backplane communication fault or module failure | Inspect backplane connector; run rack self-test |
| USB port unresponsive | Damaged USB-B connector or locked config key | Rotate front key to unlock; test USB cable on another device |
Dimensions, Mounting & Wiring Notes
- H×W×D: 221 mm × 30.5 mm × 241 mm
- Mounting method: 3500 rack slot mount, slot 1 adjacent to power supply
- Terminal notes: Route Ethernet cable away from high-current wiring. Keep front USB connection for local service only; do not leave permanently connected.
FAQ
Q: Does this module control the machine trip relays for overspeed? A: No. Hardwired trip relays operate independent of the TDI. Module failure will not block machinery protection trips. Q: Can I install this card in any empty 3500 rack slot? A: No. It must occupy slot 1, the first slot next to the rack power supply. Other slot positions prevent backplane communication. Q: Is this unit factory new sealed? A: Bently Nevada discontinued 3500/22M. Available stock is surplus or fully refurbished. Q: I have an existing 3500 rack with old TDI. Can I directly swap this unit? A: Yes. Confirm firmware revision and transient channel license before replacement. Perform work during machine outage. Q: What risk comes with hot-swapping this module? A: Backplane communication will reset. Active waveform capture will abort. Protection relay logic remains active. Q: How long does your pre-shipment functional test run? A: 24-hour continuous powered burn-in plus configuration load, Ethernet handshake and waveform capture validation. Q: Can this module work without System 1 software? A: The rack protection logic still runs. You lose transient waveform capture and remote diagnostic data upload.
