This offering is ideal for Class I, Div2 / Zone 2 areas and delivers a compact and easy to maintain solution that:
- Provides a fully integrated fieldbus module solution.
- Simplifies the solution over the previous ISTA approach.
- Reduces overall cabinet size.
- Reduces overall solution costs.
- Reduces installation costs.
- Added Value with Line Fault Detection, per baseplate.
The solution consists of a set of baseplates supporting different types of FBMs and includes the galvanic isolators and associated Termination Assembly. The Termination Assembly is embedded on the baseplate, using less overall space and removing the need for cabling between the baseplate and the Termination Assembly.
The ISTA-BP solution also offers a fault signal output, a HART connector for multiplexer use and on-line addition or removal of baseplates. Other benefits include the following:
- All approvals are handled by P+F for UL/cUL certification in North America and for ATEX certification in Europe.
- EMC and CE marking.
- QuickLok mechanism for simple quick mounting: easy to test, commission and maintain.
- Modules are available with 3 port isolation channels will isolate between each of the input/output/power supply.
- Fuse protection in the IS barrier to provide integrity and safety on individual basis.
- Integral tagging facility for easy identification.
- Detailed information on the isolator specification/connections shown on every individual module.
- Fault Signal Output, which detect and signal any wire open circuit.
- HART connector embedded on each baseplate: to be used with external multiplexer, when non HART FBM is used, to be linked to FDT (PC50).
- Standard cabinet layouts are available.
- Usesa standard I/A baseplate to baseplate cables with the addition of a 4.75” cable (12 cm) enabling adjacent baseplates to be connected without the cable extending higher than the FBM and barriers.
Intrinsic Safety (IS) is a method of providing safe operation of electric process control instrumentation where hazardous atmospheres exist; this method keeps electrical or thermal energy so low that ignition of hazardous atmosphere cannot occur.
Intrinsically Safe equipment and wiring is designed to be incapable of releasing sufficient electrical or thermal energy under normal or abnormal conditions to cause ignition of a specific hazardous atmospheric mixture in its most easily ignited concentration, according to ISA-RP12.6. It is achieved by limiting the amount of power available to electrical equipment in hazardous areas to levels below that which will ignite gasses or vapors, combustible dusts, or ignitable fibers or flyings. The equipment must have been tested and approved by an independent agency to assure its safety. Products to be mounted in hazardous areas can be approved either under Loop or Entity approval concept.
Intrinsic Safety Barrier is a device inserted in an electric wire route between process control instrumentation and point where wire passes into hazardous area. It limits voltage and current on the wire to safe levels. Often many barriers are mounted together on some barrier panel or in common enclosure.
