2
0
1
8
-1
2
62
Installation
3.16
System Expansion
Adding I/O modules
By adding an I/O-module, input or output data will be transferred to a slot that was previously
empty. To do this, the configuration of the com unit must be adapted. Changes to the
configuration of the com unit usually result in the function being interrupted due to a fieldbus
restart.
To avoid this, you can activate Hot Configuration in Run (HCiR) in the com unit. If HCiR is
active, a new configuration can be transferred to the com unit in the form of a passive data
record. In this way, the master still has access to the old configuration in its existing form. As
soon as the new configuration in the master matches the new configuration in the com unit, the
new configuration in the com unit is activated and the old configuration is deleted. For more
information, refer to the software manual for the com unit used.
Extending the fieldbus
In order to extend the fieldbus cable, the bus termination module may have to be removed. In
this case, operation can only be maintained using a redundant system.
Warning!
Explosion hazard due to cable installation
Changes to the cable installation must only be carried out in the absence of a potentially
explosive atmosphere or when equipment is de-energized.
Warning!
Unused cable entries
Unsealed cable entries can cause conductive parts such as loose wire ends to generate sparks
that could ignite an explosive mixture.
n
Seal all unused openings in the enclosure prior to the start of commissioning with
appropriate stopping plugs or sealing plugs in order to maintain the selected type of
protection. See the relevant approval.
