Redundancy via SCA-RS
SICAM RTUs, SICAM AK Redundancy
Unrestricted
51
DC2-026-2.07, Edition 10.2016
1.3.1.5 Redundant Automation Units in Ring-Shaped Configurations
•
For coupling redundant masters in the ring the
fieldbus interface CM-0821 as of version
GA0-821
-B
has to be used.
•
Redundancy by means of a patch field is not
recommended for availability reasons.
•
CM-0821 master-module
−
Configuration switch S1
1 ..... Rate 0 ........... OFF ... )
2 ..... Rate 1 ........... ON ..... )
....... e.g. baud rate 19 200
3 ..... Rate 2 ........... OFF ... )
4 ..... Rate 3 ........... ON ..... )
5 ..... Star/ring ........ ON ..... ring
6 ..... Level-CH3 ..... OFF ... line-idle state
....... light off
7 ..... Level-CH2 ..... ON ..... line-idle state
....... light on
8 ..... Level-CH1 ..... ON ..... line-idle state
....... light on
−
Configuration switch S2
A
L .......... ON ...... )
master topologically left
R ......... OFF .... )
master topologically left
10/11 ... ON ...... 11 Bit word length
−
Configuration switch S2
B
L .......... OFF .... )
master topologically right
R ......... ON ...... )
master topologically right
10/11 ... ON ...... 11 Bit word length
Master
SICAM AK
to the Slaves
Fieldbusinterfaces
in the ring
CM-0821
Settings on the
configuration switch S1
CM-0821 Master-Module
Cable
Patchcable, length max. 3 m
Cable
FO, length:
1,3 km using 62,5/125 µm fibre
s
e
e
s
e
c
ti
o
n
“R
e
d
u
n
d
a
n
t
A
U
s
,
v
o
ti
n
g
w
it
h
S
C
A
-R
S
”
see section
or
“MPT IEC 60870-5-101 or 103, optical, ring”
“MPT IEC 60870-5-101 or 103, optical, ring+star”
“SIEMENS-Fieldbus IEC 60870-5-101, optical, ring”
or
Settings on the
configuration switch S2
CM-0821 Master-Module
B
Settings on the
configuration switch S2
CM-0821 Master-Module
A
1
IEC 60870-5-104
1
2
2
2
O
N
L
R
Ring
1
0
/1
1
ESD
EARTH
FACILITY
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
SICAM
PS-5620
ESD
EARTH
FACILITY
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
RY
ER
SICAM
PS-5620
8
7
6
4
3
2
1
5
O
F
F
O
N
L
R
Ring
1
0
/1
1
