Siemens SIPROTEC 7SD610 Manual page 284

Mounting and Commissioning
3.1 Mounting and Connections
Jumper X11 is used to activate the flow control which is important for the modem communication.
Table 3-11
Jumper
X11
1)
Default Setting
Jumper setting 2-3: The connection to the modem is usually established with a star coupler or fibre-optic con-
verter. Therefore the modem control signals according to RS232 standard DIN 66020 are not available. Modem
signals are not required since the connection to the SIPROTEC 4 devices is always operated in the half-duplex
mode. Please use the connection cable with order number 7XV5100-4.
Jumper setting 1-2: This setting makes the modem signals available, i. e. for a direct RS232-connection
between the SIPROTEC 4 device and the modem this setting can be selected optionally. We recommend to
use a standard RS232 modem connection cable (converter 9-pin to 25-pin).
Note
For a direct connection to DIGSI with interface RS232 jumper X11 must be plugged in position 2-3.
RS485 Interface
The following figure shows the location of the jumpers of interface RS485 on the interface module.
Interface RS485 can be modified to interface RS232 and vice versa, according to Figure 3-8.
Figure 3-9
284
Jumper setting for CTS (Clear To Send, flow control) on the interface module
/CTS from Interface RS232
1-2
Position of terminating resistors and the plug-in jumpers for configuration of the RS485
interface
/CTS controlled by /RTS
1)
2-3
SIPROTEC, 7SD610, Manual
C53000-G1176-C145-6, Release date 02.2011