Wiring Principle - Siemens Cerberus CS1140 Manual

28.4

Wiring principle

28.4.1 LON-Bus as stub line
E3X10. /
B3Q...
I-Bus
LON-Bus
E3I040
24VDC
R60 = 100 Ω (EOL)
28.4.2 LON-Bus as free topology
E3X10. /
B3Q...
I-Bus
LON-Bus
E3I040
24VDC
R60 = 50 Ω (EOL)
Building Technologies
Fire Safety & Security Products
K3I110 K3I050
remove R1 remove R1
max. 32 LON-Bus devices
The EOL resistors R1 (100 Ω) have to be removed on all LON-Bus devices except the last one on
the line.
B3Q580
K3I110 K3I050
remove R1 remove R1
max. 32 LON-Bus devices
The EOL resistors R1 (100 Ω) have to be removed on all LON-Bus devices. The EOL resistor R60
on E3I040 has to be changed to 50 Ω (e.g. use 2 resistors of 100 Ω in parallel circuit).
T-taps are only possible from the terminal blocks of the LON-Bus devices.
B3Q590/
B3Q580
595
R1=100 Ω (EOL)
remove R1
B3Q590/
B3Q580
595
remove R1 remove R1
E3I040 I-Bus/LON module
Max. length of LON-Bus
as stub line: 1000m
Max. length of LON-Bus
as free topology: 500m
(cable length to all
devices added)
001260_k_en_--.doc
02.2005
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