Siemens siprotec SJ62 User Manual page 25

1 Introduction
Binary Inputs and
Outputs
Front Elements
Serial Interfaces
23
• Monitoring of the pickup conditions for the individual protective functions
• Interrogation of limit values and sequences in time
• Control of signals for the logic functions
• Output of control commands for switching devices
• Recording of messages, fault data and fault values for analysis
• Management of the operating system and the associated functions such as data re-
cording, real-time clock, communication, interfaces, etc.
• The information is provided via output amplifiers (OA).
The computer system obtains external information through the binary input/output
modules (inputs and outputs). The computer system obtains the information from the
system (e.g remote resetting) or the external equipment (e.g. blocking commands).
Outputs are, in particular, commands to the switchgear units and indications for
remote signalling of important events and statuses.
With devices with integrated or detached operator panel, information such as messag-
es related to events, states, measured values and the functional status of the device
are provided via light-emitting diodes (LEDs) and a display screen (LCD) on the front
panel.
Integrated control and numeric keys in conjunction with the LCD facilitate interaction
with the remote device. Via these elements all information of the device such as con-
figuration and setting parameters, operating and fault messages, and measured
values can be accessed. Setting parameters may be changed in the same way.
In addition, control of circuit breakers and other equipment is possible from the front
panel of the device.
A serial PC interface on the front panel is provided for local communications with the
device through a personal computer using the operating program DIGSI.This facili-
tates a comfortable handling of all device functions.
A separate service interface can be provided for remote communication with the
device via a personal computer using DIGSI. This interface is especially well suited for
dedicated connection of the devices to the PC or for operation via a modem. The
service interface can also be used to connect an RTD box (= resistance temperature
detector) for entering external temperatures (e.g. for overload protection).
The additional interface (only 7SJ64) is designed exclusively for connection of a
RTD-Box (= resistance temperature detector) for entering external temperatures.
All data can be transferred to a central control center or monitoring system via the
serial system interface. This interface may be provided with various protocols and
physical transmission schemes to suit the particular application.
A further interface is provided for the time synchronization of the internal clock via
external synchronization sources.
Further communication protocols can be realized via additional interface modules.
Over the operating or service interface you can serve the device (only with 7SJ64)
from a distance or locally with a standard Browser. This can take place during the initial
start-up, examination and also during the operation with the devices. For this the
SIPROTEC 4 standard "Web monitor" is available.
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015