Description
3. Key Technical Specifications
- Module Type: Data Manager I/O for 3500/20 Rack Interface Module
- Primary Function: Primary interface to 3500 rack for configuration and data
- Communication: Proprietary Bently Nevada protocol
- Compatibility: Works with 3500 rack monitors and external processors
- Front Panel: Status LEDs for communication and module health
- Rear Connections: Euro-style connectors for I/O
- Operating Temperature: -30°C to +65°C (standard for 3500 series)
- Humidity: 95% non-condensing
- Rack Position: Installs with main RIM in designated slot
- Keyphasor Support: Buffered outputs available in related configurations
- Power: Supplied by 3500 rack backplane
4. Product Introduction
The Bently Nevada 350020 with 125760-01 is the Data Manager I/O module for the 3500/20 Rack Interface Module. It serves as the main communication gateway between the 3500 rack and configuration software or external systems using the proprietary protocol.
In daily operation on vibration monitoring racks, this module handles rack configuration, data passing, and status reporting. It integrates tightly with the main RIM to keep the protection system online and accessible.
- 350020 125760-01
- 350020 125760-01
5. Troubleshooting Quick Reference
| Symptom | Possible Cause | Relevance to this Part | Quick Check Method | Recommendation |
|---|---|---|---|---|
| No communication to software | Loose I/O connections | ✅ High | Check rear Euro connectors and cable seating | Reseat cables, verify power |
| RIM LEDs not normal | Module fault | ✅ High | Observe front panel status LEDs | Cycle rack power or replace I/O module |
| Partial data loss | Protocol mismatch | ✅ Medium | Confirm software version matches firmware | Update software or check config |
| Buffered output issues | Wiring error | ❌ Medium | Measure signals at coaxial outputs | Verify Keyphasor wiring if used |
| Intermittent rack access | Backplane contact | ✅ Medium | Inspect module seating | Remove and reinstall firmly |
Provide software error logs, LED states, and rack configuration details when contacting support.
6. Frequently Asked Questions (FAQ)
What exactly is the 125760-01 in the 3500/20 setup? It is the Data Manager I/O module that pairs with the main Rack Interface Module. It handles the external data and configuration traffic for the entire rack.
Is this module hot-swappable? In redundant RIM setups yes, but confirm your rack configuration. Standard single RIM systems require rack power down to avoid communication loss.
Does this replace older RIM I/O modules? Yes. The 125760-01 is the Data Manager version used in many current 3500 installations. Verify compatibility with your specific RIM main module.
How do I configure it? Use the 3500 System Configuration software. The module passes configuration data to all other modules in the rack. Connect via the appropriate port on the RIM.
What is the typical lead time? Common 3500/20 spares like this are usually in stock for immediate shipment. We test communication paths before packing.
Can I use this with TMR racks? The 125760-01 is part of the standard interface family. TMR versions use different main RIM hardware — confirm your rack type before ordering.
Why choose surplus for this interface module? Tested new surplus units offer immediate availability and cost savings while delivering the same performance. We verify full I/O functionality in a live rack.



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