N U M E R I C A L O C / E F P R O T E C T I O N R E L AY AD R 1 4 1 C / 2 4 1 C
ASHIDA Electronics Pvt. Ltd.
Ref: Manual / ADR141C / 241C
Issue: 04D
Date : 10.07.2014
Page
69/86
10.
2
General questions
10.2.1 What is meant by an event?
Event is nothing but every action performed by the relay. For e.g. status ON is one event and
status OFF is other event.
10.2.2 How can we read the events that are generated in the relay?
When the communication link is established between the PC and RS485 port of relay, then
events can be read on the PC through the SCADA software.
10.2.3 What is RS485?
RS485 is the communication port through which relay is communicates with PC through
SCADA software.
10.2.4 Where this port is located?
RS485 port is located at the rear side of the relay for permanent wiring of SCADA system.
10.2.5 Why RS485 port is used?
RS485 port is useful for long distance communication with unlikely any distortion in the
transmission and reception of data. The major advantage of RS485 Port is it is multidrop i.e.
upto 32 different devices can be connected to single port.
10.2.6 What is Relay Talk?
Relay Talk is software (Provided with this relay) which is installed in the PC. This software
provides you Communication Bridge between PC and Relay.
10.2.7 Why RS232 to RS485 ISOLATED CONVERTOR is used?
Generally PC is provided with RS232 port, to connect Relay with standard PC we need
RS232 to RS485 Isolated Convertor.
Convertor
Relay 1
Relay 2
Differential Relay
Transformer
Protection
Differential Relay
Bus Bar
Protection
RS485 Data Bus
Central Control
Convertor
Relay 1
Relay 2
Differential Relay
Transformer
Protection
Differential Relay
Bus Bar
Protection
Central Control
Convertor
Relay 1
Relay 2
Differential Relay
Transformer
Protection
Differential Relay
Bus Bar
Protection
Central Control
Convertor
Relay 1
Relay 2
Differential Relay
Transformer
Protection
Differential Relay
Bus Bar
Protection
Central Control
