Siemens FC700A - Wiring Principles for LON-Bus

E3I040 I-Bus/LON module
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Siemens Building Technologies 007831_a_en_--.doc
Fire & Security Products 03.2004
11.4 Wiring principle
max. 32 LON-Bus devices
I-Bus
E3I040
LON-Bus
K3I050 B3Q580
FC700A
FT700A
24V DC
max. length of LON-Bus
as stub line: 1000m
R60=100 (EOL) Ω
LON-Bus as stub line
B3Q590/
595
K3I110
remove R1
R1=100 (EOL) Ω
remove R1 remove R1
Note:
 The EOL resistors R1 (100Ω) have to be removed on all LON-Bus devices
except the last one on the line.
I-Bus
E3I040
LON-Bus as free topology
LON-Bus
B3Q580
K3I050 B3Q580
24V DC
max. length of LON-Bus
as free topology: 500m
(cable length to all
devices added)
R60= (EOL) 50 Ω
remove R1
max. 32 LON-Bus devices
B3Q590/
595
K3I110
FC700A
FT700A
remove R1
remove R1 remove R1 remove R1
Note:
 The EOL resistors R1 (100Ω) have to be removed on all LON-Bus devices. The
EOL resistor R60 on E3I040 has to be changed to 50Ω (e.g. use 2 resistors of
100Ω in parallel circuit).
 T-taps are only possible from the terminal blocks of the LON-Bus devices.