Siemens SIPROTEC 4 7UT6 Series Manual page 341

Jumper /CTS from Interface RS232
1) Default setting
Jumper setting 2-3: The connection to the modem is usually established 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 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
i
i
For a direct connection to DIGSI with interface RS232 jumper X11 must be plugged in position 2-3.
RS485 Interface
Interface RS485 can be modified to interface RS232 and vice versa (see
With default setting, jumpers are plugged in such a way that terminating resistors are disconnected. For the
configuration of the terminating resistors both jumpers have to be plugged in the same way.
The terminating resistors are connected to the corresponding interface module that is mounted to the
processor board C-CPU-2.
The module for the RS485 Interface is shown in
inFigure 3-18.
For bus-capable interfaces a termination is necessary at the bus for each last device, i.e. terminating resistors
must be connected.
[steckbruecken-rs485-020313-kn, 1, en_GB]
Figure 3-17
SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
Figure 3-15 shows the PCB C-CPU-2 with the layout of the boards.
Position of terminating resistors and the plug-in jumpers for configuration of the RS485 inter-
face
/CTS controlled by /RTS
Figure 3-16
Figure 3-17. The module of the Profibus interface is shown
Mounting and Commissioning
3.1 Mounting and Connections
and Figure 3-17).
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