NOTE
For a direct connection to DIGSI with interface RS232 jumper X111 must be plugged in position 2-3.
If there are no external terminating resistors in the system, the last devices on a RS485 bus must be config-
ured via jumpers X103 and X104.
Table 3-10 Jumper settings of the Terminating Resistors of the RS485 interface on the C-CPU-2 processor
board
Jumper Terminating Resistor
enabled
Terminating resistor
disabled
Presetting
X103 2-3 1-2 1-2
X104 2-3 1-2 1-2
Note: Both jumpers must always be plugged in the same way!
When the device is delivered from the factory, the terminating resistors are disconnected (jumper setting 1-2).
The terminating resistors can also be connected externally (e.g. to the connection module as illustrated in
Figure Figure 3-19). In that case the terminating resistors provided on the C-CPU- 2 processor board must be
switched off.
Jumper X90 has no function. The factory setting is 1-2.
Mounting and Commissioning
3.1 Mounting and Connections
324 SIPROTEC 4, 7UT6x, Manual
C53000-G1176-C230-5, Edition 09.2016
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