The Bently Nevada 3500/22M 138607-01 functions as the essential communication backbone for the 3500 Machinery Protection System. By serving as the Transient Data Interface (TDI), this module facilitates the high-speed transfer of both static and dynamic (waveform) data to GE’s System 1® Condition Monitoring software. It solves the critical challenge of capturing "transient" events—such as machine startups, coast-downs, and alarm triggers—that standard monitoring modules might miss, providing engineers with the diagnostic depth required for root cause analysis and predictive maintenance.
As a core component of the 3500 rack, the 138607-01 (Standard Ethernet I/O Module) ensures reliable connectivity and data integrity.
| Feature | Specification |
| Module Type | Enhanced Transient Data Interface (TDI) |
| I/O Part Number | 138607-01 (Standard Ethernet/RS232 I/O) |
| Protocol Support | TCP/IP, Ethernet, and proprietary Bently Nevada protocols |
| Front Port | RS232 Configuration Port (9-pin D-shell) |
| Rear Ports | 10Base-T/100Base-TX Ethernet & RS232/RS422 |
| Data Capture | Static, Trend, and Waveform (Dynamic) data |
| Power Consumption | 10.5 Watts maximum |
| Operating Temp | -30°C to +65°C (-22°F to +150°F) |
Understanding the specific configuration of the 3500/22M-01-01-00 (associated with assembly 138607-01) is vital for rack compatibility:
3500/22M: The "M" signifies the "Enhanced" version of the TDI, offering significantly faster data throughput and improved transient capture capabilities compared to the legacy /22 version.
01 (Option 1 - I/O Module Type): Indicates the Standard Transient Data Interface I/O Module. This hardware provides the physical RJ45 and serial interfaces at the rear of the rack.
01 (Option 2 - Agency Approval): This suffix typically denotes CSA/NRTL/C approvals, certifying the module for use in Class I, Division 2, Groups A, B, C, and D hazardous environments.
138607-01: This specific part number refers to the Standard Ethernet I/O Module hardware assembly itself, used in conjunction with the main TDI processor.
Proper installation of the 138607-01 is paramount to prevent communication timeouts or data packet loss within the MCM network.
Rack Placement: The 3500/22M TDI must always be installed in the slot immediately to the right of the Rack Power Supplies (typically Slot 1).
I/O Seating: Ensure the 138607-01 I/O module is firmly bolted into the rear of the rack to maintain a consistent connection with the backplane. Loose connections can trigger "Rack Configuration Errors."
Network Topology: Use shielded Cat5e or Cat6 cabling for the Ethernet port. In high-EMI (Electromagnetic Interference) industrial environments, ensure the shield is grounded at the rack end to protect signal integrity.
Configuration: Use the Bently Nevada 3500 Rack Configuration Software via the front RS232 port to assign a static IP address before integrating the module into the plant-wide LAN.
Q: Is the 3500/22M 138607-01 backward compatible with older 3500 racks?
A: Yes, it is designed to replace the older 3500/22 TDI. However, you must update your Rack Configuration Software and firmware to ensure the rack recognizes the "M" series enhancements.
Q: What happens if the TDI module fails?
A: Machining protection (trips/relays) provided by other modules (like the 3500/42M) remains active. However, you will lose the ability to view data in System 1 and cannot change rack configurations until the TDI is replaced.
Q: Does this module require a separate Keyphasor input?
A: The TDI receives Keyphasor signals through the rack backplane from the 3500/25 Keyphasor module. It does not require direct wiring to sensors for speed data.
