How to Select the Right Front and Rear Cards for the 3500/22M Transient Data Interface Module?

The 3500/22M Transient Data Interface (TDI) module from Bently Nevada is a critical component for integrating the 3500 monitoring system with advanced diagnostic software like System 1. A key step in deploying this module is selecting the correct combination of the main TDI unit (front card) and its corresponding I/O module (rear card). This guide will help you navigate the ordering options to ensure optimal performance and compatibility for your machinery condition monitoring application.

Understanding the Ordering Code

The 3500/22M TDI is ordered using the following format:

3500/22–AA-BB-CC

Where:

AA: Transient Data Interface Type

BB: I/O Module Type (defines communication physical layer)

CC: Agency Approval (certification for use in specific environments)

Step 1: Select the Front Card (TDI Module Type)

A: Transient Data Interface Type

01: Standard. This is the standard version used for the vast majority of monitoring applications. It provides full functionality for collecting both steady-state and transient dynamic data.

For most users, option 01 is the correct choice.

Step 2: Select the Rear Card (I/O Module Type)

The I/O module determines how the TDI connects to your network. Your choice depends on the required communication medium, distance, and environmental noise.

B: I/O Module Type

Part Numbers for Spare I/O Modules:

146031-01: Standard Copper I/O Module

146031-02: Standard Fiber Optic I/O Module

146031-03: Copper I/O Module with Gold Contacts

146031-04: Fiber Optic I/O Module with Gold Contacts

Step 3: Select the Required Agency Approval

This selection ensures the module meets the safety and environmental certifications required for your installation location.

C: Agency Approval

Key Selection Considerations

1.Communication Medium:

Choose Copper (01/03) for cost-effective, short-range connections within a control cabinet or non-noisy environments.

Choose Fiber Optic (02/04) for noise immunity, longer distances, and enhanced security in critical network infrastructure.

2.Relay Contact Material:

Standard relays are rated for 5A and are suitable for most alarm circuit applications.

Specify Gold-Plated contacts (03/04) if the OK relay will be connected to a low-energy input (like a PLC digital input card) to prevent contact oxidation and ensure signal integrity.

3.Certification Requirements:

Always check the site's safety requirements. For installations in potentially explosive atmospheres (even Zone 2/Div 2), the Multi (02) certification is typically necessary.

4.Compatibility Warning:

When upgrading from an older 3500/20 Rack Interface Module (RIM), you must remove both the old RIM and its corresponding I/O module before installing the new TDI and TDI I/O module. Failure to do so will damage the new TDI.

Example Configurations

Typical Plant Application (North America):

3500/22-01-01-01 - Standard TDI, Copper I/O, CSA/Div 2 certification.

Global Refinery Application (Noisy Environment):

3500/22-01-02-02 - Standard TDI, Fiber I/O, Multi (ATEX/IECEx) certification.

Linking to PLC with Low-Current Inputs:

3500/22-01-03-02 - Standard TDI, Copper I/O with Gold Contacts, Multi certification.

Conclusion

Selecting the right combination of front and rear cards for the 3500/22M TDI is straightforward once you understand your network requirements and operational environment. By carefully considering the communication medium, relay needs, and necessary safety certifications, you can ensure a reliable and compliant interface for your machinery condition monitoring system.