1 Introduction
18
7SD610 Manual
C53000-G1176-C145-4
Serial Interfaces Via the serial operator interface in the front panel the communication with a personal
computer using the operating program DIGSI is possible. This facilitates a comfortable
handling of all device functions.
The service interface
can also be used for communication with a personal computer
using DIGSI. This is especially well suited for the central interrogation of the devices
from a PC or for remote operation via a modem.
All device data can be transmitted to a central evaluating unit or control center through
the serial system (SCADA) interface
. This interface may be provided with various
physical transmission modes and different protocols to suit the particular application.
A further interface is provided for time synchronization
of the internal clock through ex-
ternal synchronization sources.
Further communication protocols can be realized via additional interface modules.
The operating or service interfaces allow the communication with both devices during
commissioning, checking and also during operation of the device, via a communica-
tion network using a standard browser. For this a special tool, the WEB-Monitor, is pro-
vided, which has been optimized for differential protection.
Protection Data In-
terface
The protection data interface is a particular case. It is used to transfer the
measuring data from each end of the protection area to the opposite end. Further in-
formation such as closing the local circuit breaker, pickup of the inrush restraint as well
as other external trip commands coupled via binary inputs or binary information can
be transmitted to the other end via the protection data interface.
Power Supply These described functional units are supplied by a power supply PS with the neces-
sary power in the different voltage levels. Brief supply voltage dips which may occur
on short circuits in the auxiliary voltage supply of the power system are usually bridged
by a capacitor (see also Technical Data, Sub-section 4.1).
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