
7SR210 & 7SR220 Configuration Guide
©2011 Siemens Protection Devices Limited
Page 13 of 14
1.1.6 Configuring Relay Data Communication
Using the keys on the relay fascia scroll down the settings menu’s into the ‘communications’ menu and change
the settings for the communication port used on the relay. All of the below settings may not be available in all
relay types. Reydisp Evolution software uses IEC60870-5-103 protocol to communicate.
COM1 – Standard RS485 Rear Port
COM2 - USB Port
COM3 – Additional (Optional) Rear Connection
COM4 – Additional (Optional) Rear Connection**
Setting name
Range
Default
Units
Notes
Station Address
1 – 254 for IEC60870-5-103
0 – 247 for Modbus RTU
0 – 65520 for DNP3.0
0
Address given to relay to
identify that relay from
others which may be using
the same path for
communication as other
relays for example in a fibre
optic hub
COM1-RS485 Protocol
OFF, IEC60870-5-103,
MODBUS-RTU, DNP3.0
IEC60870-5-
103
COM1 is the rear mounted
RS485 port
COM1-RS485 Baud
Rate
75 110 150 300 600 1200
2400 4800 9600 19200
38400
19200
COM1-RS485 Parity
NONE, ODD, EVEN
EVEN
COM2-USB Protocol
OFF, IEC60870-5-103,
DNP3.0, MODBUS-RTU,
ASCII
IEC60870-5-
103
COM2 is the front USB port
COM2-USB Baud Rate
75 110 150 300 600 1200
2400 4800 9600 19200
38400 57600 115200
230400 460800 921600
Auto detects
Auto detects baud rate via
Connection Manager Setting
COM2-USB Parity
NONE, ODD, EVEN
EVEN
COM3 Protocol
OFF, IEC60870-5-103,
MODBUS-RTU, DNP3.0
IEC6-0870-5-
103
COM3 This is an optional
rear mounted connection
COM3 Baud Rate
75 110 150 300 600 1200
2400 4800 9600 19200
38400 57600 115200
57600
COM3 Parity
NONE, ODD, EVEN
EVEN
COM3 Line Idle*
LIGHT ON, LIGHT OFF LIGHT
OFF
COM3 Data echo*
ON, OFF
OFF
COM4 Protocol**
OFF, IEC60870-5-103,
MODBUS-RTU, DNP3.0
OFF
COM4 This is an optional
rear mounted connection
COM4 Baud Rate**
75 110 150 300 600 1200
2400 4800 9600 19200
38400
19200
COM4 Parity**
NONE, OFF, EVEN
EVEN
COM4 Line Idle**
LIGHT ON, LIGHT OFF LIGHT
OFF
COM4 Data echo**
ON, OFF
OFF
*Not applicable for RS485 or RS232 interface modules.
**Fibre Optic Module only