• Integrated redundant fieldbus power for ALF111 Foundation™ fieldbus cards

• 8-segment redundancy

• High-density, compact design

• Fully isolated

• Hot swappable power modules*

• Low power dissipation

• Zero component carrier

• On-line diagnostics option

• Redundant power & conditioning

• Vertical DIN-rail mounting

• F801 output 21.5V, 350mA

• F802 output 28V, 500mA

The F880 fieldbus power system is designed to provide redundant power for

eight Foundation™ fieldbus H1 segments when used with Yokogawa ALF111

fieldbus cards. The F880 module carrier has system connectors for direct

connection to two redundant pairs of fieldbus cards using Yokogawa AKB336

cables.

Power for the fieldbus segments is provided by two power modules – F801s

or F802s – operating in a redundant configuration (loadsharing).

Failure alarms, galvanic isolation, power conditioning and segment termination

are incorporated into each F80x module. In simplex applications, a single F80x

module may be used. Termination of the fieldbus segments is automatically

maintained when single or redundant F80x modules are fitted.