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RS485 Interface
SIPROTEC, 7UT6x, Manual
C53000-G1176-C230-2, Release date 06.2012
Mounting and Commissioning
3.1 Mounting and Connections
Interface RS485 can be modified to interface RS232 and vice versa (see Figures 3-16 and 3-17).
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. Figure 3-15 shows the PCB C-CPU-2 with the layout of the boards.
The module for the RS485 Interface is illustrated in Figure 3-17. The module of the Profibus interface is
illustrated in Figure 3-18.
For bus-capable interfaces a termination is necessary at the bus for each last device, i.e. terminating resistors
must be connected.
Figure 3-17 Position of terminating resistors and the plug-in jumpers for configuration of the RS485 interface
Figure 3-18 Position of the plug-in jumpers for the configuration of the terminating resistors at the Profibus (FMS and
DP), DNP 3.0 and Modbus interfaces
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