35
UMG 604
Bus-Struktur
• All devices are connected in a bus struc-
ture (line).
• In a segment, up to 32 participants are
switched together
• The cable is terminated with resistors at the
start and end of a segment.
• For more than 32 participants, repeaters
(line amplifiers) are used to connect the in-
dividual segments.
• Devices with terminated resistor have to be
supplied.
• We recommend to install the master UMG
at the end of the segment.
• In case that the master UMG with terminat-
ed bus resistor will be removed, the bus is
not under operation.
• In case that slave UMG with terminated bus
resistor will be removed or is not switched
on, the bus can be unstable.
• UMGs which have no termination can be
replaced without any interruption of the
bus.
Fig. schema bus structure
SlaveSlaveSlave
Slave Slave Slave Repeater
Slave Slave Slave Slave
Master
Power supply necessary
Bus terminator on
T
T
T
T
T
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