Siemens 7XV5655-0BB00 Manual page 9

Application in Substations
When using a 7XV5655-0BB00 Serial Modem enables a protection unit to exchange
serial data via an Ethernet network. The operating PC can also be linked to this
Ethernet network via a 7XV5850 office modem or 7XV5655 Serial Modem.
The protection unit is connected to the Serial Modem via its serial interface. The serial
interface types available are RS232 or RS485 (same connector), and FO (fibre optic
cable). The serial data is converted to the UDP protocol as useful data in the Serial
Modem and transmitted to the office modem via the Ethernet link.
The modem meets the requirements for standard compliance, uninterrupted
transmission of serial DIGSI
listening into the serial frame traffic and sending the serial IEC telegrams via the
Ethernet packed into blocks. Both full-duplex and half-duplex data transmission (RS485)
is possible. The serial control lines are not supported. The connection is established
between the IP address of the dialling office modem and the IP address of the
substation modem and then configured with AT commands via the serial interface
before selection of DIGSI®. The substation modem can be configured with password
protection and, as an additional security feature, only permits access from certain IP
addresses, for example, only from that of the office modem.
The Serial Modem is addressed like a normal phone modem in DIGSI® Remote, except
that instead of phone numbers IP addresses are set that can be assigned to each Serial
Modem by the network administrator. There is a configuration tool contained in the
scope of supply for this purpose.
WAN (Private Network)
up
Ethernet-
Office-Modem 7XV5850
with powersupply
Power
SIEMENS
DC
RS232 LAN
RS232-Cable
7XV5100-4
Config-Tool
DIGSI 4
Station-PC for
Remote control
and Configuration for
the Ethernet-Modems
Fig. 2: Application in substations with SIPROTEC
SIEMENS AG
or IEC 60870-5-103/101 frames via the network by
®
Router / Switch
1 2 3 4 5 6
LAN
Patch-Cable
Substation-
modem 1
Ethernet-
Modem
Patch-Cable
7XV5655
RS485-Bus-cable 7XV5103
SIPROTEC SIPROTEC
SIEMENS SIEMENS
RUN ERROR RUN ERROR
L1 402,1A Max450.1A L1 402,1A Max450.1A
L2 402,1A Max450.1A L2 402,1A Max450.1A
L3 402,1A Max450.1A L3 402,1A Max450.1A
E 00.0A E 00.0A
Anr. L1 Anr. L1
Anr. L2 Anr. L2
Anr. L3 Anr. L3
Anr. Erde Anr. Erde
Automat Automat
SIPROTEC 4 Max. 31 SIPROTEC 4 Devices
with Ethernet- with RS485-Interface
Interface
Page 9 of 79
FO-Cable 6XV8100
Substation-
modem 2
INPUT
Ethernet- Mini-Star-
Modem coupler
7XV5655 7XV5450
SIPROTEC
SIEMENS
RUN ERROR
L1 402,1A Max450.1A
L2 402,1A
L2 402,1A Max450.1A L3 402,1A
L3 402,1A Max450.1A
E 00.0A
Anr. L1
Anr. L2
Anr. L3
Anr. Erde
Automat
Max. 4 SIPROTEC 3 Devices
with optical Interface
®
devices
Manual 7XV5655-0BB00
Max450.1A L2 402,1A Max450.1A
Max450.1A L3 402,1A Max450.1A
Max. 31 SIPROTEC 3
C53000-G1176-C175-3
RS485-FO
Converter
7XV5650
7XV5103
SIEMENS SIEMENS
RUN RUN
ERROR ERROR
Anr. L1 Anr. L1
Anr. L2 Anr. L2
Devices with
RS485-Interface