For annunciating systems the challenge today is to fit in the numerous requirements which are present in substation integration. On the one hand galvanic isolated contacts are necessary to process conditions of dry contacts in different voltage levels. On the other hand protocols are welcome to forward information on the station buses without the effort of wiring like on IEC 61850.

In regard of reading out metering devices, temperatures, data exchange with PLC the smallest common factor is often Modbus, as it is a rather simple protocol. Since October EES is delivering its universal fault annunciator series “USM” with the free of charge Modbus TCP implementation.

For communication with superior or inferior third party systems in the control or process level, the annunciator provides one or two interface cards, while the latter is on surcharge providing also Modbus RTU, if needed.

The device operates always as a Modbus slave (passive Modbus) with a Modbus address between 1 and 255. If Modbus TCP is used, the IP address of the communication partner (Modbus master) or for Modbus RTU the settings for the serial interface must be set in the parameterization which is accessible on the device through a webserver. Then data is accessible via Modbus-registers or -coils.

To retrieve the respective information any 3rd party tool or device can be taken. EES offers a defined data structure as reports were e.g. various information about the inputs, collective reports, horn conditions or buttons pushed and all other options i.e. relay states can be read out.

Else also commands can be carried out using Modbus communication to trigger relays, acknowledgement commands or even to activate inputs in case of sparing the wiring.

To round off the flexibility with the USM from EES the protocols can be mixed together and by this form a gateway for maximum flexibility needs. Individual inputs can be set by Modbus TCP while forwarding the whole process image on IEC 61850.

Be flexible – coping with todays and tomorrows needs in one consolidated device. USM – the universal fault annunciator.

Über die EES Elektra Elektronik GmbH & Co. Störcontroller KG

EES is a family owned mid-sized company, combining technological expertise and innovation since more than 40 years. We provide high-value solutions in the range of fault annunciating and telecontrol systems. Today we are contributing with a comprehensive lineup to increase availability and operation reliability of countless energy generation and distribution plants all over the world, especially in the Middle East region since more than 20 years. Our products serve todays and upcoming requirements in high-voltage and medium-voltage applications, by sophisticated design and innovative functionality. The latest product generation is a breakthrough in the field of substation automation with IEC 61850 and offers also links to superior SCADA Systems over IEC 60870-5-104. Our products are based on recognized market standards. Adaption to process parameters on-site can easily be done e.g. by integrated Web-Server. Reliable signal transmission on various media is also a core competence of EES. In the field of transmitting data over radio or cable networks, we offer a very adaptive system which can be set-up by the customer without any software. Furthermore we secure the long-term availability of spare parts for our products. EES is certified by Dekra Corporation to comply with DIN EN ISO 9001:2008 and 14001:2004 standards.

Firmenkontakt und Herausgeber der Meldung:

EES Elektra Elektronik GmbH & Co. Störcontroller KG
Hummelbühl 7-7/1
71522 Backnang
Telefon: +49 (7191) 182-0
Telefax: +49 (7191) 182-200

Sascha Hahn
Telefon: +49 (7191) 182-245
Fax: +49 (7191) 182-200
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