Description
Product Description
The 3500/22 (125768-01) is a rear-mounted interface module designed for the Bently Nevada 3500 machinery protection platform. It functions as the physical connection layer for the 3500/22 Transient Data Interface (TDI), enabling communication, configuration access, and high-speed data exchange between the rack and external monitoring systems.
Installed at the rear of the rack directly behind the TDI front module, this unit forms part of the system’s communication infrastructure. It is responsible for providing network connectivity and data routing while leaving the protection and voting logic of the system unaffected.
The module is not involved in protection decision-making; its role is strictly communication and data handling within the 3500 architecture.
Core Functions
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Provides physical Ethernet interface for 3500/22 TDI
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Enables high-speed data transmission between rack and external systems
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Supports configuration upload and download functions
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Transfers steady-state and transient waveform data
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Integrates with System 1 condition monitoring software
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Maintains separation from protection and voting logic
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Supports remote diagnostic access and rack communication
Communication Interfaces
| Interface |
Specification |
| Ethernet Port 1 |
10/100Base-TX (Auto-sensing) |
| Ethernet Port 2 |
100Base-FX Fiber (configuration dependent) |
| USB Port |
USB-B (local configuration access) |
These interfaces allow:
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High-speed vibration waveform transfer
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System 1 connectivity
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Remote diagnostics and monitoring
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Rack configuration management
Electrical Characteristics
| Parameter |
Specification |
| Power Source |
Supplied via 3500 rack backplane |
| Function |
Ethernet and configuration I/O interface |
| Relay Support |
Provided via associated TDI module |
| Relay Rating |
5 A @ 24 VDC / 120 VAC |
| Contact Type |
Gold-plated, low-current compatible |
| Minimum Switching Load |
1 mA @ 1 VDC |
| Arc Protection |
Integrated suppression circuit |
Front Panel Indicators & Controls (via TDI System)
| Indicator |
Function |
| OK LED |
Normal system operation |
| TX/RX LED |
Communication activity status |
| TM LED |
Trip Multiply active state |
| CONFIG OK LED |
Valid configuration status |
| Control |
Function |
| Rack Reset Button |
Clears latched alarms and faults |
| Address Switch |
Configures rack address (1–127) |
| Mode Key Switch |
Selects RUN or PROGRAM mode |
Mechanical Details
| Parameter |
Specification |
| Model |
3500/22 (125768-01) |
| Mounting Location |
Rear of 3500 rack, behind TDI module |
| Module Type |
Rear interface I/O assembly |
| Dimensions |
2.5 × 11.2 × 24.2 cm |
| Weight |
0.45 kg |
Environmental Design
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Engineered for continuous operation in harsh industrial environments
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Suitable for high-vibration and high-noise electrical areas
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Commonly deployed in process plants, turbine halls, and compressor stations
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Compatible with long-term monitoring installations
System Role
Within the 3500 architecture, the 3500/22 (125768-01) performs as a communication backbone component. It:
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Bridges rack-level data with external monitoring systems
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Supports real-time waveform and transient event transmission
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Enables integration with predictive maintenance platforms
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Does not influence protection logic or trip decision pathways
FAQ
Is this module part of the protection system logic?
No. It handles communication and data transfer only and does not participate in protection or voting functions.
What software does it support?
It is designed for integration with Bently Nevada System 1 condition monitoring software.
Can it operate without the TDI front module?
No. It functions as the rear interface component and must be paired with the 3500/22 TDI module.
What type of data can it transmit?
It supports steady-state vibration data, transient waveform data, and system configuration information.
