The ROUTE-MASTER™ RM100 Series is an intrinsically-safe fieldbus power supply system providing galvanically-isolated and fieldbusconditioned power for FOUNDATION Fieldbus or PROFIBUS PA segments. Fieldbus devices may be connected into these segments only through RMA100 or RMA100C Device Couplers, and any intrinsicallysafe segment may only contain intrinsically-safe devices, that are approved for the appropriate Zone/Division of use and the appropriate Gas hazard.