13
= Key1
= Key 2
= Key 3
= Max. value or consumption = Min. value or supply
LON-Bus (Option)
For the connection of the UMG505 with other LON-
bus devices a FTT10-transceiver is used within the
UMG 505. Hence, the bus is safed against change
of polarity and can be connected at one or two
sides. Devices, that use a FTT10 -transceiver, can
be connected to each other via line, star or ring
structures.
If the allowed transmission impedance is reached
within a structure, the network can be enlarged by
using repeaters or routers.
Free wiring
For free wiring and bus connection at one end, the
maximum cable length may be 500m, and the
maximum distance between two devices may be
400m.
Bus wiring
For bus wiring and connection at both sides, the to-
tal cable length may be 2700m at maximum. The
UMG 505 does not have a connectable terminal
resistor for LON-bus.
Allowed cable length
Depending on the selected structure of the network
and the chosen cable type, different transmission
distances can be achieved.
Diagr. Free structure
Diagr. Bus structure with terminal resistors at both
ends.
Termination or central feeding
Device with LON bus
Terminal resistor
Cable type
Length
TIA 568A Category 5
< 900m
Belden 85102, 16AWG
< 2700m
Belden 8471
< 2700m
Level IV, 22AWG
< 1400m
JY (St) Y 2x2x0.8, 20AWG
< 900m
Diagr. Maximum distance for
bus wiring.
Diagr. Maximum length at
free wiring.
Length
Cable type
Total device - device
TIA 568A Category 5
500m
< 250m
Belden 85102, 16AWG 500m
< 500m
Belden 8471
500m
< 400m
UL Level IV, 22AWG
500m
< 400m
JY(St)Y 2x2x0.8, 20AWG 500m
< 320m
Diagr. Connection LON-Bus
UMG505
LON-Bus
FTT-10A
GND
LON Bus
1
2
