Siemens 7XV5655-0BB00 Manual page 9

English
Application in Substations
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 optical). The
serial data are 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 requirement for standard compliant, uninterrupted transmission of
serial DIGSI or IEC 60870-5-103/101 frames via the network by listening into the serial
®
frame traffic and sending the serial IEC telegrams via the Ethernet packed in blocks. Both
full-duplex and half-duplex data transmission (RS485) are 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
9 / 77
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
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 Max450.1A
L2 402,1A Max450.1A L3 402,1A Max450.1A
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
7XV5655-0BB00
RS485-FO
Converter
7XV5650
7XV5103
SIEMENS
RUN
ERROR
L2 402,1A Max450.1A
L3 402,1A Max450.1A
Anr. L1
Anr. L2
Max. 31 SIPROTEC 3
Devices with
RS485-Interface
C53000-G1176-C175-2
SIEMENS
RUN
ERROR
Anr. L1
Anr. L2