Connecting up
6.2 Further notes
Extender for SCALANCE XM-400
42
Operating Instructions, 09/2018, C79000-G8976-C332-08
Safety notices for use according to ATEX and IECEx
If you use the device under ATEX or IECEx conditions you must also keep to the following
safety notices in addition to the general safety notices for protection against explosion:
WARNING
Take measures to prevent transient voltage surges of more than 40% of the rated voltage.
This is the case if you only operate devices with SELV (safety extra-low voltage).
6.2
Further notes
Further notes
WARNING
Commissioning devices and replacement devices
If you use redundancy mechanisms (HRP/MRP ring redundancy and/or redundant coupling
of rings with standby), open the redundant path before you insert a new or replacement
device in an operational network. A bad configuration or attachment of the Ethernet cables
to incorrectly configured ports causes overload in the network and a breakdown in
communication.
A device may only be inserted in a network and connected in the following situations:
•
With HRP/MRP:
–
Ring redundancy must be activated
–
The mode must be selected correctly.
–
The ring ports of the device being inserted in the HRP/MRP ring must be configured
as ring ports.
•
With standby link:
–
The standby connection must be activated.
–
The "Standby Connection Name" must match the name of the partner device.
–
The port must be configured as a standby port.
For further information, refer to the configuration manuals (Page 5).
