7 Annex
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7
Annex
7.1 Configuration examples for power supply
If each field box is supplied with power individually, the maximum length of a field
box line is limited only by the maximum cable length of the field bus.
However, if the power supply is looped through from field box to field box, the
maximum ratings given below apply.
Three different configurations are shown for each of the different SCHMERSAL
devices. One configuration with long cable lengths (maximum), one configuration
with medium cable lengths (medium) and one configuration with shorter cable
lengths (small).
The design examples listed in the table on the next page,
apply to the following assumptions:
−
The examples represent maximum configurations.
If individual cable length is reduced, larger systems are possible.
−
Wiring of the power supply with 2 x 1.5 mm² and fuse protection with
10 A.
−
Use of SCHMERSAL cables.
−
The cable lengths listed in the table between the power supply and the
1st field box, as well as between the field boxes, are the maximum
lengths.
Reducing the individual cable length is not critical.
−
These designs assume simultaneous control of all lock or unlock
functions for the connected solenoid interlocks.
Larger systems are possible with time shift activation of the lock or
unlock function.
