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Microcomputer System
Apart from processing the measured values, the microcomputer system (C) also executes the control func-
tions. They especially include:
• Filtering and preparation of the measured quantities
• Continuous monitoring of the measured quantities
• Output of control commands for switching devices
• Recording of messages, data and values for analysis
• Management of the operating system and the associated functions such as data recording, real-time clock,
communication, interfaces, etc.
• The information is distributed via output amplifiers (OA).
Binary Inputs and Outputs
The computer system obtains external information through the binary input/output boards (inputs and outputs).
The computer system obtains information from the system (e.g remote resetting) or from external equipment
(e.g. blocking commands). Outputs include, in particular, signals for the remote indication of important events
and conditions.
Front Elements
Optical displays (LEDs) on the front panel indicate whether the device is ready for operation.
HMI Interface
The HMI interface of the device is used to connect the operation panel. The operation panel can be permanent-
ly attached to the 6MU805 or it can be detached. The operation panel contains 32 LEDs for displaying operating
states or indications and a 6-line field for displaying operational indications and measured values or a graphical
field for displaying the control display. You can also operate the device using the keypads, for example, to ac-
tivate or deactivate equipment.
Note
The Merging Unit device 6MU805 reuses the HMI interface of 7SC80, detailed information, see chapter
Interfaces
Port F is an optical Ethernet interface to transmit SV and exchange GOOSE messages to bay level devices
according to IEC 61850. Communication with DIGSI can be effected via the USB-DIGSI interface or via port
F (system/service interface). It should be considered that the DIGSI communication can influence the SV trans-
mission.
Power Supply
A power supply unit (V
dips may occur if the voltage supply system (substation battery) becomes short-circuited. Usually, they are
bridged by a capacitor (see also Technical Data).
A replaceable buffer battery is located on the side of the device.
SIPROTEC, 6MU805, Manual
C53000-G1140-C380-5, Release date 06.2018
or PS) delivers power to the functional units using the different voltage levels. Voltage
aux
Introduction
1.1 Overall Operation
3.1.3.2
.
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