Description
3500 Internal Barriers are intrinsically safe interfaces that provide explosion protection for transducer systems connected directly to the 3500 Machinery Protection System. The internal barriers are fully compatible with the 3500 System and provide a convenient and cost-effective solution for installing all types of transducer systems within a hazardous area.
The internal barriers are fully compatible with the 3500 System and provide a convenient and cost-effective solution for installing all types of transducer systems within a hazardous area
Unlike external barriers, 3500 Internal Barriers are an integral part of the 3500 System and will not degrade the system’s performance.  
We offer Bently Nevada transducer systems with comprehensive approvals for hazardous area installations. The transducer systems are matched to those of the 3500 Internal Barriers. See Compatible Monitors and Transducers on page 8.

Each component complies both individually and as part of a system with the safety requirements of North American and international standards.  Hence, you don’t have to reference individual certificates to verify the compatibility between components.
Standard and internal barrier monitors can reside within the same 3500 rack. You can upgrade standard monitors  by replacing existing I/O modules with those that contain internal barriers
Installation Guidelines
The internal barriers for a 3500 rack are incorporated in special Monitor I/O Modules.   These barriers provide explosion protection for transducer systems that are connected to the 3500 system.  An intrinsically safe (IS) earthing module provides the IS earth connection through the 3500 system backplane. The IS Earth Module requires a dedicated I/O module position and precludes the use of this monitor position for other 3500 System modules.  This limits a standard 19-inch rack to 13 monitor positions.  Furthermore, a number of installation options are not available when internal barriers are installed in a 3500 rack.For users who need to know or purchase such equipment, they can contact the supplier for more information by email itadcs@163.com or WhatsApp message +86 17750019513.