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Runto Electronic Automation Limited
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Product Number
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F860-CA
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1 OVERVIEW
The F860 is designed to provide redundant power for eight Foundation™ fieldbus H1 segments when used with Honeywell Experion "Series C" Fieldbus Interface Modules (FIMs). The module carrier complies with the mechanical and electrical requirements of 11.6 inch I/O Termination Assemblies (IOTAs), for direct fitting into Honeywell mounting channel. Power for the fieldbus segments is provided by two power modules - F801 or F802 - operating in a redundant configuration. 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.
2 DESCRIPTION
For extreme reliability, the F860 IOTA is passive and only provides interconnections between the power modules and the external connections.
The IOTA has two multi-pin connectors, each of which is connected to a FIM IOTA by means of a standard system cable. Different lengths are available, to accommodate mounting of the F860 and its respective FIM IOTAs in various locations within a Series C I/O cabinet. Field wiring is connected at the FIM IOTA. Each F80x module provides galvanic isolation between the 24V DC input power and the fieldbus segments, as recommended by the IEC61158-2 fieldbus standard and the Fieldbus Foundation™ FF-831 validation test for power conditioners. There is galvanic isolation between the fieldbus segments, thereby preventing segment failure in the event of ground faults in the field wiring.
Each F80x module has indicator LEDs to show both its status and that of the eight segments under power. In normal operation, each green 'Segment' LED is lit, showing that the segment is powered. If a segment is shorted, this LED is extinguished, and the red 'Alarm' LED is lit.
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