F8xx Redundant Power Supply Systems utilizing F801 Power Modules


f801 (Rev E or higher)

Registered Product Information

Manufacturer: Relcom
Product Name: F8xx Redundant Power Supply Systems utilizing F801 Power Modules
Product Description: Power Supply
Category: H1 Power Supply
Profile: FOUNDATION Power Supply/Conditioner
More Information: The F8xx fieldbus power system is designed to provide redundant power for eight FOUNDATION fieldbusTM H1 segments. Versions are available for direct integration into all major DCS.  Power for the fieldbus segments is provided by two F801 power modules operating in redundant configuration (load sharing). Failure alarms, galvanic isolation, power conditioning and segment termination are incorporated into each F801 module. In simplex applications, a single F801 module may be used. Termination of the fieldbus segments is automatically maintained when single or redundant F801 modules are fitted.  Each segment has a nominal output rating of 21.5V, 350mA. When used with a suitably certified Megablock wiring hub, the spurs may be connected to ExnL or ‘non-incendive’ fieldbus instruments with a maximum safety input voltage of 24V. 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. Each F801 module monitors the output of the eight fieldbus segments and indicates an alarm by means of a built-in, normally closed relay if any of the segments is shorted, or below the minimum output voltage threshold. Failure of either of the bulk power input supplies is also annunciated.

Registration Information

Registration Authority: FieldComm Group
Registration Status: Registered

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