• Redundant fieldbus power for 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 F890 fieldbus power system is designed to provide redundant

power for eight Foundation™ fieldbus H1 segments when used with

the Emerson DeltaV or another non-proprietary cabled fieldbus system.

Power for the fieldbus segments is provided by two power modules

– F801s or F802s – operating in redundant configuration (load sharing).

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.

For extreme reliability, the module carrier has no components

and only provides interconnections between the power modules

and external connections. It is supported in a rigid metal frame that

protects the circuit board from mechanical damage. Secure DIN-rail

mounting is provided by integrated fixings.