2.8 Inter relay communication
71
6MD665 Manual
C53000-G1876-C103-3
Optical connection
OLM
Figure 2-27
Connection of bay controllers to inter relay communication (optical)
An OLM is used as an interface converter (optical/electrical). The connection from the
6MD665 device to the OLM occurs electrically via an RS485 interface. The electrical
connections are to be terminated with resistors. These terminating resistors are set
with jumpers in the 6MD665 device and with DIL switches (S1, switches 1 and 2) in
the OLM. The jumper settings can be found in Chapter Installation and Commis-
sioning.
The connection of the interface converters is optical (in series) and its operation is
asynchronous. A theoretical baud rate of 9600 Baud to 115200 Baud is set with a DIL
switch (S2, switch 5 off, 6 on, 7 on, 8 off). One of the following operating modes can
be selected in DIGSI
®
using the serial interface settings.
Table 2-15
Operating mode of the IRC interface (optical)
Transmission mode
Baud rate
HDLC
125 KBaud
UART
500 KBaud
Summary of Contents for SIPROTEC 6MD665
Page 8: ...Preface vi 6MD665 Manual C53000 G1876 C103 3 ...
Page 14: ...Contents vi 6MD665 Manual C53000 G1876 C103 3 ...
Page 140: ...3 Installation and Commissioning 126 6MD665 Manual C53000 G1876 C103 3 ...
Page 166: ...4 Technical Data 152 6MD665 Manual C53000 G1876 C103 3 ...
Page 210: ...Literature 196 6MD665 Manual C53000 G1876 C103 3 ...
Page 222: ...Index 208 6MD665 Manual C53000 G1876 C103 3 ...