2 Setting up a system
26 A04089_07_E00_02 HBM: public MX Modules
Greater distances than 5 m in FireWire networks can be bridged with optohubs that
enable distances of up to 100 m with the use of a fiber optic cable. Distances over
100 m significantly reduce the number of hubs as follows:
n <100 m fiber optic cable: 11 Hops
n 100 - 200 m fiber optic cable: 7 Hops
n 200 - 250 m fiber optic cable: 5 Hops
n 250 - 300 m fiber optic cable: 3 Hops
Another advantage in addition to wide measurement module distribution and the
associated short sensor leads, is fully -isolated data communication between dif-
ferent system components, to suppress the electromag-netic interference of high
overhead line voltages in rail traffic, for example.
Multiple FireWire connection (with CX27C-R or MX471C-R)
Data is transferred, modules are synchronized in timing and voltage is supplied via
the FireWire connections. A maximum of 12 modules can be connected in series
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