Siemens SIPROTEC 7SA522 Manual page 388

3 Mounting and Commissioning
RS232 Interface
388
Table 3-10 Exchange Interface Modules
Interface
System Interface
Service Interface
Protection Data Interface 1
Protection Data Interface 2
The order numbers of the exchange modules can be found in the Appendix in Section
A.1, Accessories.
Interface RS232 can be modified to interface RS485 and vice versa (see Figures 3-9
and 3-10).
Figure 3-8 shows the C-CPU-1 PCB with the layout of the modules.
The following figure shows the location of the jumpers of interface RS232 on the inter-
face module.
Devices in surface mounting housing with fibre optics connection have their fibre
optics module housed in the console housing. The fibre optics module is controlled via
a RS232 interface module at the associated CPU interface slot. For this application
type the jumpers X12 and X13 on the RS232 module are plugged in position 2-3.
Figure 3-9 Location of the jumpers for configuration of RS232
Terminating resistors are not required for RS232. They are disconnected.
With jumper X11, CTS (Clear-to-Send) is activated which is necessary for modem
communication is enabled.
Table 3-11 Jumper setting for CTS (Clear To Send, flow control) on the interface module
Jumper /CTS from Interface RS232
X11
1)
Default Setting
Mounting location / inter-
face
B
C
D
E
1-2
Exchange module
Only interface modules that can
be ordered in our facilities via the
order key (see also Appendix,
Section A.1).
FO5 to FO8
/CTS controlled by /RTS
1)
2-3
7SA522 Manual
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