[steckbruecken-rs485-020313-kn, 1, en_GB]
Figure 3-13 Position of terminating resistors and the plug-in jumpers for configuration of the RS485 inter-
face
Profibus/DNP Interface
[steckbruecken-profibus-020313-kn, 1, en_GB]
Figure 3-14 Location of the jumpers for configuring the terminating resistors of the active electrical
module (PROFIBUS and DNP 3.0 interface)
EN100 Ethernet Module (IEC 61850)
The Ethernet interface module has no jumpers. No hardware modifications are required to use it.
Termination
For bus-capable interfaces, a termination is necessary at the respective last device on the bus, i.e. termination
resistors must be connected. On the 7VK61 device, this concerns the variants with RS485 or PROFIBUS7/DNP
interfaces.
The terminating resistors are located on the RS485 or PROFIBUS interface module, which is on the C-CPU-2
board (Serial no.1 in Figures Figure 3-3 and Figure 3-4), or directly on the PCB of the processor board C-CPU-2
(see margin heading "Processor Board C-CPU-2“, C-CPU-2 processor board, Page 186).
Figure 3-11 shows the C-CPU-2 PCB with the layout of the modules.
The board with configuration as RS485 interface is shown in Figure 3-13, the module for the Profibus/DNP
interface in Figure 3-14.
For the configuration of the terminating resistors both jumpers have to be plugged in the same way.
On delivery the jumpers are set so that the terminating resistors are disconnected.
The terminating resistors can also be implemented outside the device (e.g. at the terminal block), see
Figure 3-15. In this case, the terminating resistors located on the interface module or directly on the PCB of
the processor board C-CPU-2 must be disconnected.
Mounting and Commissioning
3.1 Mounting and Connections
198 SIPROTEC 4, 7VK61, Manual
C53000-G1176-C159-5, Edition 05.2018
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