Profibus Pa Junctions And Connectors - ABB AC 800M User Manual

Section 3 Fieldbus Topologies

PROFIBUS PA junctions and connectors

The PROFIBUS PA T-Connectors are available as Standard and Ex(Haz.) version.
They are used for coupling 1 up to 4 transmitters to the PA trunk via spurs. The
spurs can optionally be connected by an M 12 connection or directly via the EMC
cable gland.
The following points shall be taken into account when selecting a junction or
connector:
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Recommendation of mounting:
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Figure 27. Preparation of the PROFIBUS PA cable for M 12 connector
3BDS009029R5001 B
Non-interrupted bus operation when exchanging or extending a PA transmitter
External grounding cable
Pressure-compensation element
EMC cable gland
Tension spring connection
Non-Ex design (integrated bus termination, switchable)
Ex(Haz.) design acc. to ATEX (external bus termination
Preparation of the PROFIBUS PA cable for M 12 connector:
PROFIBUS PA junctions and connectors
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