Introduction
1.1 Overall Operation
SIPROTEC, 7UM62, Manual
C53000-G1176-C149-7, Release date 03.2010
24
Front Elements
Light-emitting diodes (LEDs) and a display (LCD) on the front panel provide information on the functional status
of the device and report events, states and measured values. The integrated control keys and numeric keys in
conjunction with the LCD enable local interaction with the device. They allow the user to retrieve any kind of
information from the device such as configuration and setting parameters, operational indications and fault
messages (see also SIPROTEC 4 System Description /1/) and to change setting parameters.
Serial Interfaces
A personal computer running the DIGSI software can be connected to the serial operator
interface (PC port)
on the front panel to conveniently operate all device functions.
The serial service
interface can equally be connected to a PC running DIGSI that communicates with the
device. This port is especially well suited to permanently connect the devices to the PC or for remote operation
via modem. The service interface can be also used for connecting a RTD box.
All data can be transferred to a central control or monitoring system via the serial system
interface. Various
protocols and physical arrangements are available for this interface to suit the particular application.
A further interface is provided for time synchronization
of the internal clock through external synchronization
sources.
Further communication protocols can be implemented via additional interface modules.
Analog Outputs / Temperature Input
Depending on the ordering variant and configuration, ports B and D can be equipped with analog output
modules for the output of selected measured values (0 to 20 mA). If these ports are equipped with input
modules (RS485 or optical) instead, temperatures can be fed in from an external temperature sensor.
Power Supply
The functional units described are supplied by a power supply PS with the necessary power in the different
voltage levels. Voltage dips may occur if the voltage supply system (substation battery) becomes short-circuit-
ed. Usually, they are bridged by a capacitor (see also Technical Data).
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