Mounting and Commissioning
3.1 Mounting and Connections
SIPROTEC, 7SJ62/64, Manual
C53000-G1140-C207-2, Release date 01.2008
416
Terminating Resistors
Table 3-17 Jumper settings of the Terminating Resistors of interface RS485 on the C-CPU-2 processor
board
Note: Both jumpers must always be plugged in the same way !
Jumper X90 has currently no function. The factory setting is 1-2.
The terminating resistors can also be connected externally (e.g. to the connection module). In this case, the
terminating resistors located on the RS485 or PROFIBUS interface module or directly on the PCB of the 7SJ64
processor board C-CPU-2 must be de-energized.
Figure 3-14 Termination of the RS485 interface (external)
Jumper Terminating resistor
closed
Terminating resistor
open
Presetting
X103 2-3 1-2 1-2
X104 2-3 1-2 1-2
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