Specifications

7SR242 Duobias Data Communications
©2010 Siemens Protection Devices Limited Chapter 4 Page 9 of 43
Setting name
Range Default Setting Notes
Station Address
0 … 65534 0 1 – 65534
An address between 1 and
254 must be given to identify
the relay
COM3 Protocol
OFF, IEC60870-5-103,
MODBUS-RTU, DNP3
IEC60870-5-
103
As Required
Sets the protocol used to
communicate on the fibre
optic connection – Com3
COM3 Baud Rate
75 110 150 300 600 1200
2400 4800 9600 19200
38400 57600, 115200
57600 As Required
The baud rate set on all of
the relays connected to the
same system must be the
same as the one set on the
master device.
COM3 Parity
NONE, ODD, EVEN EVEN As Required
The parity set on all of the
relays connected to the
same fibre optic system
must be the same and in
accordance with the master
device.
COM3 Line Idle
LIGHT ON, LIGHT OFF LIGHT OFF As Required
Sets the idle state of the line
in accordance with master
device
COM3 Data Echo
ON,OFF OFF As Required
Set to ON when relays are
connected in a ring
configuration.
COM4 Protocol
OFF, IEC60870-5-103,
MODBUS-RTU, DNP3
IEC60870-5-
103
As Required
Sets the protocol used to
communicate on the fibre
optic connection – Com4.
COM4 Baud Rate
75 110 150 300 600 1200
2400 4800 9600 19200
38400
57600 As Required
The baud rate set on all of
the relays connected to the
same system must be the
same as the one set on the
master device.
COM4 Parity
NONE, ODD, EVEN EVEN As Required
The parity set on all of the
relays connected to the
same fibre optic system
must be the same and in
accordance with the master
device.
COM4 Line Idle
LIGHT ON, LIGHT OFF LIGHT OFF As Required
Sets the idle state of the line
in accordance with master
device
COM4 Data Echo
ON,OFF OFF As Required
Set to ON when relays are
connected in a ring
configuration.