The all new FieldBarrier R4D0-FB-IA from Pepperl+Fuchs is a diagnostic-enabled isolated device coupler for FOUNDATION Fieldbus H1 and PROFIBUS PA instruments. The very compact FieldBarrier is DIN rail mounted in Zone 1/Div.2 environments and connects 8 … 12 instruments with intrinsic safety in Zone 0… 1/Div.1 environments. The FieldBarrier provides advanced fault diagnostics and isolation at the spur, enables live work on the trunk or spurs and supports plug-in surge protectors. The result is simplified installation, improved troubleshooting and maximized plant uptime. At the spur, advanced fault protection isolates conditions such as short circuit, jabber or bounce, and advanced diagnostics detect installation quality issues for optimum segment availability. Internal components such as the terminator are connected without wiring, and connections requiring maintenance are minimized. Critical components are designed with redundancy or monitored for degradation to ensure high product integrity.