Siemens 7SR224 Technical Manual page 143

J Loss per connector
K Total loss at connectors (IxJ)
L Total losses (E+H+K)
M Receive power budget (A-L)
N Safety Margin
O Device Receive Sensitivity
There are two optional fibre optic ports, com3 and com4, and when fitted the associated settings are available in
the Data Communication menu. To allow communication using either or both of these ports the relay settings
must be changed, via the fascia, in accordance with the method of connection and master device.
Setting name Range
1 – 254 for IEC60870-5-
103 or IEC60870-5-101
Station Address
0 – 247 for Modbus RTU
0 – 65520 for DNP3.0
OFF, IEC60870-5-103,
MODBUS-RTU, DNP3.0
COM3 Protocol
or IEC60870-5-101
75 110 150 300 600 1200
2400 4800 9600 19200
COM3 Baud Rate
38400 57600
NONE, ODD, EVEN
COM3 Parity
LIGHT ON, LIGHT OFF
COM3 Line Idle
ON,OFF
COM3 Data Echo
Local, Remote, Local Or
COM3 Mode
Remote
OFF, IEC60870-5-103,
MODBUS-RTU, DNP3.0
COM4 Protocol
or IEC60870-5-101
75 110 150 300 600 1200
2400 4800 9600 19200
COM4 Baud Rate
38400
©2010 Siemens Protection Devices Limited
Default Setting
1
0 As Required
0
IEC60870-5-
As Required
103
57600 As Required
EVEN As Required
LIGHT OFF As Required
OFF As Required
Remote Remote
IEC60870-5-
As Required
103
57600 As Required
7SR224 Argus Data Comms
dB
dB
dB
dB
dB
dB
Notes
An address within the range
of the relevant protocol must
be given to identify the relay.
Each relay must have a
unique address.
Sets the protocol used to
communicate on the fibre
optic connection – Com3
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.
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.
Sets the idle state of the line
in accordance with master
device
Set to ON when relays are
connected in a ring
configuration.
Selects port mode
Sets the protocol used to
communicate on the fibre
optic connection – Com4.
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.
Chapter 4 Page 9 of 76