Design
Siemens PLT130
.
1994
3/4
Bus components
Connector board AF
The remote bus cable is connected to the bus conv erter via the
connector board AF.
The board is provided with a terminat ing resistor which can be
activated using a jumper. The resist or is activated in the con-
nector board of the first and last bus participant s (Fig. 3/3).
Standard locations:
Basic cabinet of the AS 235 and AS 235 H automation s y-
stems
Basicsystem of the AS 235 K automationsystem
OS265-3 system cabinet
Remote bus connection unit.
Remote bus BRemote bus A
4-km bus
e.g.TELEPERM M
cabinetwith
AS235 H
e.g.Remote bus
connectionunit
(OS 265-3)
e.g.TELEPERM M
cabinet
a Terminatingresistor F (activated by jumper )
AF Connector board
UI Bus converter
Fig. 3/3 Redundant remote bus with terminating resistors
Remote bus connection unit
The remote bus connection unit is used t o connect those bus
participants to the remote bus which are not installed in
TELEPERM M standard cabinets, as e. g. the OS 520 operation
andmonitoring system.
The power supply module, inductive bus converters, connector
board for connection of one participant or of a participant group
(local bus island) are fitt ed ready for connection in a separate
housing which is to be placed underneath a t able.
Remote bus connection subrack
The remote bus connection subrack is us ed to connect those
bus participants to the remot e bus which are fitted in cabinets
according to the customer requirements, e. g. SIMATIC S5-155U
programmable controllers.
The power supply module and inductive bus converters for con -
nection of one or several par ticipants installed in the cabi net are
accomodated in a subrack which has been prepared for ins tal-
lation in a cabinet.
Bus coupler
Autonomous buses are connected together vi a a bus coupler.
Datatransfer is then possible betweenseveral systems or sys-
tem areas over larger distances (> 4 km) with decoupling of the
datatraffic on the buses.
The intermediate connection of up to 2 bus couplers is permis si-
ble for data transfer between any two participants in t he com-
pletebus system.
Twodifferent structures are possible w hen designing a bus sy-
stem with bus couplers:
Line structure
Hierarchical structure.
≤
≤
BKBus coup ler
Fig. 3/4 Bussystem with linear structure
≤
≤
BKBus coup ler
Fig. 3/5 Bussystem with hierarchicalstructure
In both applications, all buses or individual buses can be redun -
dant as desired (Fig. 3/6).
BKBus coup ler
Bus 0 and bus 2 are redundant for av ailability reasons. To reduce cable
costs, bus 1 is not redundant and is e. g. the connection between two buil-
dings.
Fig. 3/6 Redundant bus, example
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This catalog is out of date, see note on page 2