EES USM - Applications for Networking Fault Annunciators; USM as an Acquisition Module in IEC 60870-5-101;104 Structures; USM as an Output Module in IEC 60870-5-104 Structures

Functional description
3.6 Applications for networking fault annunciators
3.6.1 USM as an acquisition module in IEC 60870-5-101/104 structures
The image below shows an application example where the USM annunciators act as acquisition
devices which process and display alarms locally. In addition, the alarms are forwarded to the SCADA
level through IEC 60870-5-101 or -104.
Fig. 3.2: Application example for communication of USM acquisition devices
(IEC-Server/Slave) with an IEC-Client/Master.
3.6.2 USM as an output module in IEC 60870-5-104 structures
Fig. 3.3: Application example with USM as an output module
In this application example, the USM48 is used to signal faults that are detected via the
IEC interface are "collected" from various devices. Additional wiring of the individual fault indication
contacts is therefore not necessary.
The single alarm channels can alternatively be triggered from the galvanic input or
from the IEC interface. These options can be chosen individually for each channel.
Acknowledgement through the IEC interface is possible as well.