ISbus: new components for R. STAHL's remote I/O system

R. STAHL's proven remote I/O system IS1 for hazardous areas provides a cost-efficient solution for conventional and HART field bus devices. A new addition to the IS1 product range is the ISbus system, which contains devices and accessories for Foundation Fieldbus H1 and Profibus PA.
To allow for the operation of a maximum number of field bus devices, the ISbus system was deliberately designed as a non-intrinsically safe solution. The new Ex e/Ex i field device coupler (Ex e/Ex i FDC) allows for the operation of intrinsi-cally safe field devices according to FISCO on a non-intrinsically safe field bus. The intrinsically safe circuits feature a short circuit protection and are galvani-cally isolated from the non-intrinsically safe bus. The Ex e/Ex e field device cou-pler (Ex e/Ex e FDC) also allows for the connection of non-intrinsically safe field devices. All couplers are approved for operation in zones 1 and 2. R. STAHL provides special ISbus power supply units for the non-intrinsically safe field bus. The supply is galvanically isolated from the field bus and is monitored for under-voltage. The field bus power supply units are installed in zone 2 or in safe areas. Apart from the new ISbus components, R. STAHL also provides complete sys-tem solutions. The product portfolio also includes a wide range of plastic, stain-less steel, sheet steel and aluminum field housings, innovative Ex plug connec-tor solutions for non-intrinsically safe field busses and complete system solu-tions for all types of field signals. Depending on the specific application, R. STAHL combines ISbus and Remote I/O IS1 components and systems, thereby providing the most effective and cost-optimized solution for the customer.