Bently 3500/42 shaft absolute vibration measurement

The integration of Internal Barrier and Standard I/O modules within a 3500 System rack demands careful consideration to ensure the separation of hazardous and safe area field wiring. Additionally, certain limitations and requirements regarding external termination and TMR rack options need to be understood for effective and compliant system setup.

Key Points:

1. Coexistence of Internal Barrier and Standard I/O Modules:
   • The same rack can seamlessly accommodate both Internal Barrier and Standard I/O modules, preserving the separation between hazardous and safe area field wiring.
2. Limitation of External Termination for Internal Barrier Modules:
   • External Termination option is not available for I/O modules with internal barriers due to hazardous area approvals restricting the use of intrinsically safe wiring within multi-cored cable assemblies.
3. TMR Rack Options and Internal Barrier Modules:
   • Monitors with TMR rack options cannot use Internal Barrier I/O modules. Connecting a transducer to multiple I/O module inputs in this scenario compromises the integrity of the Intrinsically Safe (IS) system.
4. Earthing Module Requirement for Internal Barrier Modules:
   • A rack containing any Internal Barrier module must incorporate a 3500/04-01 IS Earthing Module to establish the Barrier Module IS earth connection.
5. I/O Module Positioning and Depth Considerations:
   • Internal Barrier I/O modules have increased depth compared to standard barrier I/O modules.
   • Careful consideration of rack positioning with respect to adjacent modules is crucial to ensure easy access during maintenance.
6. Occupancy Flexibility for Internal Barrier I/O Modules:
   • Internal Barrier I/O modules and IS Earthing modules can occupy any general-purpose rack position.
   • They can be adjacent to standard I/O module types without compromising the mandated 50 mm (2 in) physical separation requirement between safe and hazardous area field wiring.

Conclusion: Configuring a 3500 System rack requires meticulous planning, especially when incorporating Internal Barrier and Standard I/O modules. Awareness of limitations, such as the absence of external termination for Internal Barrier modules, and considerations like I/O module positioning and depth differences, ensures a compliant and efficient setup. Adhering to these guidelines fosters the coexistence of diverse modules while maintaining the integrity of hazardous and safe area field wiring separation.