ABB AC 800M

Section 3 Fieldbus Topologies PROFIBUS PA junctions and connectors
3BDS009029R5001 B 77
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:
• 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
Recommendation of mounting:
• Preparation of the PROFIBUS PA cable for M 12 connector:
Figure 27. Preparation of the PROFIBUS PA cable for M 12 connector