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Migrating from current loop to PROFIBUS PA - Dale Fittes and Dave Tomlin of Hitex
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Transcript of Migrating from current loop to PROFIBUS PA - Dale Fittes and Dave Tomlin of Hitex
One pair of wires for each device
Group Equipment Category
Locations Corresponds
to Comments
Gases Dusts
I M1 Mines
n/a Capable of functioning safely in the presence of an explosive atmosphere
I M2 Mines
n/a Must be de-energised when an explosive atmosphere is present
II 1G 1D Other
Zone 0 Protection assured in the event of two independent failures
II 2G 2D Other
Zone 1 Protection assured in the event of foreseeable failures
II 3G 3D Other
Zone 2 Protection assured during normal operation
Source : Wikipedia
Isolation Barrier
All this wiring could be replaced by a Single Twisted-Pair
Fieldbus-based
PROFINET
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* Above 31.25kb/s
