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GENERAL INFORMATION ON DEVICE POSITIONING
INSTRUCTION MANUAL 15
This minimum Ddo distance depends on:
•
the operating distance between emitter (TXA) and receiver (RXA)
•
the effective aperture angle of the ESPE (EAA)
Figure 8 - ESPE Type 4
The following table shows, for convenience, the values of the minimum installation dis-
tances relative to some operating distances:
3
0.3
6
0.4
10
0.5
19
0.6
OPERATING
DISTANCE (m)
MINIMUM INSTALLATION
DISTANCE (m)
CAUTION
The interfering device (TBX) must be positioned at the same Ddo distance,
calculated as shown above, even if closer to TXA respect to RXA.
Installation precautions have to be taken to avoid interference between
homologous devices. A typical situation is represented by the installation
areas of several adjacent safety devices aligned one next to the other, for
example in plants with different machines.
Содержание SG4 FIELDBUS Series
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