Wiring And Connecting The Uss Plug - Siemens SIDOOR ATD401W System Manual

Controllers
4.5 Relay and fieldbus interfaces
4.5.2.2

Wiring and connecting the USS plug

Requirement
NOTICE
PROFIBUS connector
Use only the recommended PROFIBUS connectors from Siemens for the USS connection.
See section Accessories (Page 21).
NOTICE
Material damage resulting from the connection of a PROFIBUS connector to service
connection X8
Connecting a PROFIBUS connector to service connection X8 can damage the SIDOOR
controller and the connected device.
For this reason, only connect a bus connector to connection X705.
Note
• Always use shielded cables.
• For stationary operation, it is advisable to remove the insulation of the shielded cable and
to establish contact on the shield/PE conductor bar.
• If there is a potential difference between the grounding points, an impermissibly high
compensating current can flow through the shield grounded at both ends. To rectify the
problem, do not, under any circumstances, open the shield of the bus cable.
Install an additional equipotential bonding conductor parallel to the bus cable to carry the
shield current.
• You will find more detailed information in Manual SIMATIC Net PROFIBUS Networks
(http://support.automation.siemens.com/WW/view/de/1971286/0/en).
118
ATD4xxW Door Controller for Industrial Applications
System Manual, 01/2017, A5E38080677-AB