Siemens siprotec 7SD5 User Manual page 464

3 Mounting and Commissioning
With jumper X11 the flow control which is important for modem communication.
Table 3-11
1)
Jumper Setting 2-3: The connection to the modem is usually carried out with a star
coupler or fibre-optic converter. Therefore the modem control signals according to
RS232 standard DIN 66020 are not available. Modem signals are not required since
communication to SIPROTEC
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
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
in position 2-3.
RS485 Interface The following figure shows the location of the jumpers of interface RS485 on the inter-
face module.
Interface RS485 can be modified to interface RS232 and vice versa, according to
Figure 3-9.
Figure 3-10
464
Jumper setting for CTS (Clear To Send, flow control) on the interface module
Jumper /CTS from Interface RS232
X11
Default Setting
Position of terminating resistors and the plug-in jumpers for configuration of the
RS485 interface
1-2
®
4 devices is always carried out in the half duplex
®
4 device and the modem this setting can
®
with Interface RS232, jumper X11 must be plugged
/CTS controlled by /RTS
1)
2-3
7SD5 Manual
C53000-G1176-C169-1