Siemens siprotec 7SA6, Manual

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Configuration
5-9
7SA6 Manual
C53000-G1176-C156-2
5.2 Configuration of the Binary Inputs and Outputs
General Upon delivery, the display on the front panel of the relay, some of the function keys,
the binary inputs and outputs (output contacts) are assigned to certain information.
These assignments may be modified, for most information, allowing adaptation to the
local requirements.
During configuration, certain information within the relay is assigned to certain physi-
cal interfaces (e.g., binary inputs and output contacts) or logical interfaces (e.g. user-
defined logic, CFC).
It must be determined which information should be linked with which device interface.
It may also be determined which properties the information should have.
Messages and statistical values from earlier events can be lost during configuration;
therefore, operational and fault data and statistic counters which are memorized in the
relay should be read and saved if desired, prior to changing the configuration.
5.2.1 Preparation
Before configuration is started, the overall interfacing requirements must be assessed.
The required inputs and outputs must be coordinated with the number of physical in-
puts and outputs present on the relay. The types of indications and commands, and
their requirements, must be taken into account.
Indications Indications may be device information regarding events and conditions that can be
transmitted via output contacts (e.g. start-up of the processor system or a trip signal
initiated by a protective function). These are defined as output indications.
Figure 5-2 Output indication (OUT)
Indications also include information from the substation to the relay regarding events
and conditions in the system (e.g. position or condition of a circuit breaker). These are
defined as
input indications
. Input indications with one binary input are
single
point indications
(SP). Two binary inputs whose normal conditions are oppo-
site, and which are monitored by the relay, are required for a
double point indi-
cation
(DP).
Trip
L+
(binary output
signal)
Output indication/tripcommand via relay contact
(system)
(7SA6)