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Jumper X11 is used to activate the flow control which is important for the modem communication.
Table 3-18
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
Figure 3-12 shows the location of the jumpers of the RS485 interface on the interface module.
Interface RS485 can be modified to interface RS232 and vice versa, according to Figure 3-11.
Figure 3-12
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
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
Mounting and Commissioning
3.1 Mounting and Connections
/CTS controlled by /RTS
1)
2-3
519
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