Excel 800 Planning
11 EN1B-0375GE51 R0910
LONWORKS Bus Topologies
The LONWORKS Bus is a 78-kilobit serial link that uses
transformer isolation so that the bus wiring does not have a
polarity. I.e. it is not important which of the two LONWORKS
Bus terminals are connected to each wire of the twisted pair.
The L
ONWORKS Bus does not need to be shielded on the
controller module side.
The LONWORKS Bus can be wired in daisy chain, star, loop
or any combination thereof as long as the maximum wire
length requirements are met.
Configuration
The recommended configuration is a daisy chain with two
bus terminations. This layout allows for max. L
ONWORKS
Bus lengths, and its simple structure presents the least
number of possible problems, particularly when adding on to
an existing bus.
See also “L
ONWORKS Mechanisms”, Product Literature no.:
EN0B-0270GE51.
C-Bus Topologies
Via the C-Bus up to 30 C-Bus devices (e.g., controllers, etc.)
can communicate with one another and a PC central. The
C-Bus must be connected via the individual controllers
(open ring).
Note
Star connection is not allowed because uncontrollable line
reflections may occur.
Instead of an Excel 800 Controllers, other C-Bus controllers
(e.g., the Excel 500, Excel 100, Excel 50) can also be
connected.
Fig. 4 C-Bus topology Excel 5000
Accessories
Besides the auxiliary parts of Table 5 on page 7, the
following accessories are available.
Preconfigured Connection Cables
Type
Connecting XCL8010
Controller with
Features
XW882 XI582 Operator Interface
5 m, shielded,
RJ45 plug with clip
XW582
+ XW586
XI582 Operator Interface
See XW582 and
XW586
XW884
Adapter cable for Excel
500/600 Controllers
0.2 m, shielded,
RJ45 – 9 pin sub-D
XW885 Laptops
3 m, shielded,
RJ45 plug with clip
XW585
+ XW586
Laptops
See XW585 and
XW586
XW586 Modems
1.8 m, RJ45 – 9 pin
sub-D
Table 14 Preconfigured connection cables
XW882 Cable Details
12
3678
4
5
XI582
WIRING
TERMINALS
XW882
SHIELD
LOOSE
ENDS
R
x
D
G
N
D
+
5
V
E
T
x
D
Y
E
L
L
O
W
G
R
A
Y
(
n
o
t
u
s
e
d
)
B
R
O
W
N
G
R
E
E
N
W
H
I
T
E
1
4
3
2
RJ45 plug with clip at front
+5V
Fig. 5 XCL8010/XI582 cable details
XW884 Cable Details
12
3678
4
5
RS232 plug
sub-D female
SHIELD
XW884
6
7
8
9
1
2
3
4
5
R
x
D
R
T
S
T
x
D
G
N
D
RJ45 plug with clip at front
+5V
Fig. 6 XCL8010/Excel 500/600 cable details
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