User's Manual

Siemens PLT 111 · 1999
6/5
Bus communication
Bus configurations
Bus configurations, examples
Application Other conditions Connecting cables
20-m local bus
Small plants
Max. 9 participants possible
Max. 20 m bus cable
Standard design redundant
Can only be used in instrumenta-
tion rooms. The guidelines for
earthing and screening must be
observed for the participants on
the local bus.
Ensure in particular that the par-
ticipants have the same ground
potential (equipotential bonding,
0-V island).
1)
N1 to N2,
N2 to N3 etc.:
6DS8 201-8..
Front plug on N1:
6DS9 200-8AA
20-m local bus / 4-km remote bus
Large plants
Max. 100 participants possible
Max. 4 km remote bus cable
Max. 32 bus converters UI can be
used, power distribution subrack
can be used for 2 bus converters
UI. The guidelines for earthing
and screening must be observed
for the participants on the local
bus.
Ensure in particular that the par-
ticipants have the same ground
potential (equipotential bonding,
0-V island).
1)
N1 to UI: 6DS8 205-8..
6DS8 204-8..
2)
6DS9 201-8FC
3)
N1 to N2,
N2 to N3 etc.:
6DS8 201-8..
20-m local bus / 4-km remote bus,
redundant
Large plants
Max. 100 participants possible
Max. 4 km remote bus cable
Max. 32 bus converters UI can be
used, power distribution subrack
can be used for 2 bus converters
UI. The guidelines for earthing
and screening must be observed
for the participants on the local
bus.
Ensure in particular that the par-
ticipants have the same ground
potential (equipotential bonding,
0-V island).
1)
N1 to UI1 and UI2:
6DS8 204-8..
6DS9 201-8CA
2)
6DS9 201-8FC
3)
N1 to N2 or
N2 to N3 etc.:
6DS8 201-8..
Individual participants on 4-km remote
bus
Medium-sized plants
Individual participants on remote
bus (large distances between
individual participants)
Maximum peripheral configura-
tion of connected automation sys-
tems
Max. 32 participants possible
Max. 4 km remote bus cable
Interface module(s) for 20-m local
bus and bus converter in the
same cabinet or subrack.
Power distribution subrack can
be used for 2 bus converters UI
per cabinet.
N to UI: 6DS8 205-8..
6DS8 204-8..
2)
6DS9 201-8FC
3)
Individual participants on 4-km remote
bus, redundant
Medium-sized plants
Individual participants on remote
bus (large distances between
individual participants)
Maximum peripheral configura-
tion of connected automation sys-
tems
Max. 32 participants possible
Max. 4 km remote bus cable
Interface module(s) for 20-m local
bus and bus converter in the
same cabinet or subrack.
Power distribution subrack can
be used for 2 bus converters UI
per cabinet.
N to UI1 and UI2:
6DS8 204-8..
6DS9 201-8CA
2)
6DS9 201-8FC
3)
1) Exceptions apply to the floating local bus interface modules N-AS and N-AT
2) Alternative with AS 235 as N/N1 and incorporation of connection distributor AV
3) Alternative with AS 235 H as N/N1 and incorporation of connection distributor AV
N N N
12 9
max.
....
N N N
12 8
max.
....
1 ... max. 32
AF
Remote bus
20-m local bus
UI
N N N
12 7
max.
....
... Max. 32
redundant
AF
Redundant
remote bus
UI
N
1 ... max. 32
AF
Remote bus
UI
N
Max. 32
redundant
AF
Redundant
remote bus
UI
This catalog is out of date, see note on page 1