The networkable annunciators of the series USM provide the functionality and flexibility of the series BSM and add communication interfaces for connection to superior or inferior systems. The new version 4.4 of the USM fault annunciator allows increased flexibility with 4 function inputs and 2 horn functions.

Support for network addresses in IPv6 has also been added and RS232/RS485 switching for the serial interface has been included as standard. Through the Modbus protocol information or states can be exchanged and through IEC 60870-5-101/104 and IEC 61850 single and double alarms can be transmitted e.g. to a SCADA system and single and double commands can be received in the opposite direction and issued from the annunciator. In addition, analog inputs enable the monitoring of limit values. Our cost-free available EPLAN macros facilitate the creation of circuit diagrams and a smart parameterisation concept ensures that the installation and commissioning of the interfaces is easier than ever!

Integrated event recorder

Simply display alarm information via web server

8-48 alarms are processed in compact housing sizes at various different voltage levels with adjustable response delays per channel. Now they can also be registered and archived accordingly in the free event recorder. The high-performance event recorder can be displayed in the web server and includes the storage of information and occurring errors via the device (Syslog) as well as the storage of incoming and outgoing alarms. The alarm memory comprises 100,000 alarms and is designed as a ring buffer. Downloading the data for further processing in Excel is also possible. With the help of various filter options, the alarms in focus can be addressed individually or a download can be performed.

Even better IT security

Upgrade also available for older versions

With regard to IT security, further new technical possibilities were used to enable an even more secure operation of the USM in the network. These include improved user administration with extended configuration options as well as an upgrade and downgrade option for versions. This also makes it possible to import old versions from previous firmware versions, which was not previously possible in this way. Attack vectors have been further eliminated through a comprehensive "security by design" process.

The new USMs are all shipped with the new version. In addition, EES offers the possibility to bring older versions to the current 4.0 status through an upgrade. This means that old systems will also receive an up-to-date IT security standard, including the new features.

This also applies to all of the WAP-K annunciators. The USM / WAP-K fault annunciator family by EES offers the reliability and security for the tasks in substations and plants in distribution and transport networks, now and in the future.