Siemens siprotec SJ62 User Manual page 396

CTS (Clear to Send)
Terminating Resis-
tors
SIPROTEC 4, 7SJ62/63/64 Handbuch
C53000-G1140-C147-A, Edition 07.2015
Table 3-22 Jumper setting for CTS on the C-CPU-2 board
Jumper /CTS from Interface RS232
X111
1)
Presetting
Jumper setting 2-3: The connection to the modem is usually established with a star
coupler or fiber-optic converter. Therefore the modem control signals according to
RS232 standard DIN 66020 are not available. Modem signals are not required since
the connection to the SIPROTEC 4 devices is always operated in the half-duplex
mode. Please use connection cable with order number 7XV5100-4
The jumper setting 2-3 is also necessary when using the RTD-box in half duplex op-
eration.
Jumper setting 1-2: This setting makes the modem signals available, i.e. for a direct
RS232 connection between the SIPROTEC 4 device and the modem this setting can
be selected optionally. We recommend to use a standard RS232 modem connection
cable (converter 9-pin to 25-pin).
Note
For a direct connection to DIGSI with interface RS232 jumper X111 must be plugged
in position 2-3.
If there are no external matching resistors in the system, the last devices on a RS485
bus must be configured using jumpers X103 and X104.
Table 3-23 Jumper settings of the Terminating Resistors of interface RS485 on the C-
CPU-2 processor board
Jumper Terminating resistor
closed
X103
X104
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.
1-2
Terminating resistor open
2-3
2-3
3.1 Mounting and Connections
/CTS triggered by /RTS
1)
2-3
Presetting
1-2
1-2
1-2
1-2
394