Fiessler ESPE Type 4, Руководство по эксплуатации

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4.4 Multi-sided screening through tilted mirrors
Using tilted mirrors, the protective field can be "wrapped around" a hazardous area, thus providing protection from several
sides (Fig. 15/1 and Fig. 15/2). Here, the law of reflection applies, whereby the angle of incidence is the same as the angle of
reflection. This means for that tilting of 90
°
requires the mirror to be installed at an angle of 45
°
. For this purpose, the tilted
mirrors for ULVT feature swivelling attachments.
Reflection loss:
Each reflection via a mirror weakens the transmitted signal. For this reason, the max. range and number of
mirror reflections must be observed when using mirrors. The transmitter, receiver and mirrors must always be assembled
vertically and checked using a spirit level.
Operational reliability can only be ensured when the mirrors are assembled in a stable manner.
Refer to Section 6 for precise adjusting information.
4.5 Assembly columns
For installation in an open area (e.g. for the multi-sided protection of hazardous areas), the ULVT light barriers and titled
mirrors can supplied as premanufactured assembly columns.
FIESSLER
E L E K T R O N I K
15
4 Installation
- Operation via tilted mirrors
Column for ULVT and mirrors
Elongated assembly slot for M12
Top cover (mirror)
Front and top lid
(transmitter, receiver)
4 adjusting screws for assembly column
BA - ULVT
Base plate as drilling template for M12 base attachment and for
supporting the adjusting screws
Fig. 15/1 Arrangement of 2 tilted mirrors
Fig. 15/2 Arrangement of 1 tilted mirror
Mirror Mirror
Receiver
Receiver
Mirror
Transmitter
Transmitter
Hazardous area Hazardous area
Fig. 15/3 Assembly columns for light barrier and mirrors