Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC, 7SD5, Manual
C53000-G1176-C169-5, Release date 02.2011
520
Profibus/DNP Interface
Figure 3-13
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 7SD5 device, this concerns the variants with RS485 or PROFIBUS7/DNP
interfaces.
The terminating resistors are on the interface module which is located on the processor board C-CPU-1 (No.
1 in Figure 3-3 and 3-4).
The interface modules are displayed in Figure 3-12 and in Figure3-13.
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 connected externally (e.g. to the connection module), see Figure 3-14.
In this case, the terminating resistors located on the interface module must be switched off.
Figure 3-14
Termination of the RS485 interface (external)
