Series 9411/21 Ex i field device couplers for Zone 1 with galvanic separation are used for interference-free connection of 4 FF H1 or PROFIBUS PA field devices to the high-power trunk. The spurs with the ia type of protection can be used for fieldbus devices in Zone 1 (FISCO/Entity) and are protected by a short-circuit limiting function.The integrated power management minimises start-up and short-circuit currents. Available with screw or spring clamp terminals.
- For connecting 4 intrinsically safe (FISCO/Entity) fieldbus devices in Zone 1
- Operation on a high-power trunk
- Reduced start-up current thanks to power management and short-circuit limiting with disconnection
