Drawer
Fieldbus
-Slave
Serial
Interface
to UMC
Com. Interface
(e.g. PDP32)
Using the UMC100.3 in withdrawable applications
The withdrawable technique is often used in industries where the highest availability and shortest downtimes are required.
In the event of an error in a drawer, the replacement with a spare drawer shall be made as fast as possible.
UMC100.3 has several unique features supporting its use in drawer systems:
• The separation of communication interface and UMC100.3
• In draw-out installations the UMC100.3 is usually mounted inside the drawer whereas the communication adapter is mounted in
the cable chamber. This ensures that no droplines are required but a straight bus line can be implemented. A very stable bus com-
munication even at high baud rates is the result!
• In the event of a drawer replacement the communication adapter stays active and sends a diagnosis message to the control
system that the UMC100.3 is missing. Even more important - the fieldbus address is stored in the communication adapter.
If a new UMC100 is connected, the old bus address is automatically used. There is no need for setting a new address! See parame-
ter Address Check for additional details.
DNP31.0 in a drawer system. The example shows the EIU32.0 EtherNet/IP™ communication interface.
Communication adapter and accessories in a draw-out installation.
The fieldbus node is outside the drawer so no drops are required.
To keep the communication interfaces powered in case the drawers are withdrawn
they must be powered separately (not shown here).
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