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E-HELP: No Cabling Restrictions for FM Approvals on SIX

E-HELP: No Cabling Restrictions for FM Approvals on SIX

Q: I want to use an SIX Signal Isolator/Converter in a loop with a cable run of 1200’. Are there cable parameter values (i.e. maximum inductance/capacitance) that must be met in order to maintain the FM Non-Incendive certification? 

A: The certification by FM of the SIX for Non-Incendive Class 1 Div 2 does not include any cabling restrictions. The maximum cable length is a function of the available compliance voltage and the total resistance (loss in the wire and device loads).

Published: July 20, 2015
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