Bently Nevada 138607-01 | 3500/22M TDI, Surplus Stock

Description

Key Technical Specifications

Product Introduction

A 3500 rack can keep tripping correctly even when the TDI is dead — and that is exactly why losing a 3500/22M often goes unnoticed until someone needs a waveform, a startup plot, or a remote System 1 connection. The 138607-01 is the TDI variant that sits in Slot 1 and carries the rack’s communication and diagnostic data burden.

This module replaces the older split of a 3500/20 RIM plus an external communication processor. It talks to M-series monitors such as 3500/40M and 3500/42M, collects static values and transient waveform data, and forwards them over Ethernet or 100Base-FX fiber to System 1 and the 3500 configuration software. It does not sit in the autonomous protection trip path, so a failed TDI should not cause a false machine trip — but it does kill visibility, trending, diagnostics, and remote configuration. For procurement, the important checks are interface type (copper Ethernet vs fiber), firmware compatibility, and whether the optional channel-enabling functions are required.

BENTLY 3500-22M 138607-01

QA/QC Transparency SOP

1. Intake & Origin Verification — Confirm Bently Nevada 3500/22M, P/N 138607-01, on the label. Record serial number, hardware revision, and connector configuration (RJ-45, fiber, USB-B). Photograph the front-panel LEDs and rear I/O.
2. Live Functional Testing — Install into a 3500/05 rack with a verified 3500/15 power supply. Confirm the OK, TX/RX, TM, and CONFIG OK LEDs behave as expected. Verify communication with 3500 Configuration Software and/or System 1.
3. Electrical Parameter Tests — Measure backplane current draw and compare against the typical 10.5 W figure. Check Ethernet link negotiation, fiber optical power if equipped, and USB-B service port response. Inspect connectors for bent pins or contamination.
4. Firmware/Config Verification — Read module firmware and rack configuration status. Confirm the TDI can upload the existing rack configuration and that M-series monitor data appears in the host software. Back up the rack configuration file before any changes.
5. Final QC & Anti-Static Packaging — Log LED status, communication test results, firmware readout, and power measurements. Return the rack to RUN mode if applicable, apply asset tag, and pack in ESD-safe packaging with connector protection.

Field Engineer Gotchas

• TDI Failure Does Not Equal Trip Failure — The 3500/22M is not part of the critical protection path. If it dies, the monitors and relays can still protect the machine. Do not shut down a turbine just because the TDI went dark; diagnose first.
• Slot 1 Is Not Optional — The TDI must occupy Slot 1 next to the power supply. Installing it in any other slot will prevent proper rack communication and configuration access. This is a common mistake during hurried replacements.
• Ethernet vs Fiber Confusion — Some 3500/22M units use copper Ethernet; others use 100Base-FX fiber. Swapping a fiber-configured TDI into a copper-only network link will produce no communication. Verify the physical interface before pulling the old module.
• RUN/PROG Switch Position — The rack key switch must be in PROG to download configuration changes and in RUN for normal protected operation. Leaving it in PROG after commissioning exposes the rack to unintended reconfiguration.
• System 1 and Firmware Mismatch — An older TDI firmware may not communicate cleanly with a newer System 1 installation, or vice versa. Always confirm compatibility against the Bently Nevada documentation before upgrading either side.

BENTLY 3500-22M 138607-01

Application Scenarios

• Steam turbine startup/shutdown monitoring — Captures vibration, displacement, and keyphasor-referenced waveform data during speed transients for balance and rub diagnosis.
• Compressor train diagnostics — Collects alarm pre/post data when a 3500/42M or 3500/40M channel crosses alert or danger thresholds.
• Remote condition monitoring integration — Provides the Ethernet or fiber link between the 3500 rack and System 1, eliminating the need for a separate communication processor in many configurations.
• Legacy 3500 rack modernization — Replaces a failed 3500/20 RIM plus external communicator with a single 3500/22M TDI, provided the rack firmware and software support it.
• Troubleshooting intermittent communication loss — When System 1 shows a rack offline but local monitors still display values, the TDI or its network link is usually the first suspect.

FAQ

Is the 3500/22M required for machine protection trips?
No. The TDI handles communication, configuration access, and data collection. The autonomous protection function resides in the monitor and relay modules.

Can I replace a 3500/20 RIM with a 3500/22M?
Often yes, because the 3500/22M combines RIM and communication processor functions. Confirm rack firmware, slot assignment, and software compatibility before swapping.

Does 138607-01 always have copper Ethernet?
Not necessarily. Some 3500/22M units support 100Base-FX fiber, and interface options can vary by configuration. Verify the physical ports on the actual module.

What software connects to it?
System 1 for condition monitoring and diagnostics, and Bently Nevada 3500 Rack Configuration Software for module setup.

Can it be hot-swapped?
3500 modules generally support hot insertion/removal in a powered rack, but the TDI should be replaced carefully to avoid disrupting active configuration sessions.

Is 138607-01 the same as 288055-01?
Both are 3500/22M TDI part numbers, but they may differ in interface options, firmware baseline, or revision. Do not treat them as automatically interchangeable without checking the OEM documentation.

Do you supply tested surplus units?
Yes. Units can be provided with part-number verification, communication testing, firmware readout, and ESD packaging. Interface type and revision should be confirmed before shipment.