Siemens Cerberus CS1140 - Wiring Principle

E3I040 I-Bus/LON module
115
Building Technologies 001260_k_en_--.doc
Fire Safety & Security Products 02.2005
28.4 Wiring principle
28.4.1 LON-Bus as stub line
Max. length of LON-Bus
as stub line: 1000m
I-Bus
E3I040
LON-Bus
K3I050 B3Q580
E3X10. /
B3Q...
24VDC
B3Q590/
595
K3I110
R60 = 100 Ω (EOL) remove R1 remove R1 remove R1 R1=100 Ω (EOL)
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.
28.4.2 LON-Bus as free topology
Max. length of LON-Bus
as free topology: 500m
(cable length to all
devices added)
I-Bus
E3I040
LON-Bus
B3Q580
K3I050 B3Q580
24VDC
B3Q590/
595
K3I110
E3X10. /
B3Q...
R60 = 50 Ω (EOL) remove R1 remove R1 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.