Mounting Notes - Siemens SIMATIC FS400 Anleitung

6.2

Mounting notes

Special notes on mounting a SIMATIC FS400 3RG7845 light curtain for danger point
guarding:
➢ Calculate the safety distance according to the formula in Chapter 6.1.1.
➢ Ensure that it is impossible to reach under, over, around or walk behind the light
curtain.
➢ Observe the maximum distance between machine table and protective field of 75
mm, with reference to a table height of 750 mm. If this is not possible because the
safety distance is too big, a mechanical barrier or a host/guest arrangement must
be provided.
➢ Observe the minimum required distance to reflective surfaces.
Special notes on mounting a SIMATIC FS400 3RG7845 light curtain for danger area
guarding:
➢ Calculate the safety distance according to the formula in Chapter 6.1.2. The
resolution determines the minimum height of the protective field above the floor.
➢ Ensure that the maximum height of the protective field above the reference plane
of 1000 mm is not exceeded and only heights equal to or less than 300 mm are
considered impossible for an adult to crawl under (also see EN 999).
➢ It must not be possible to step into the danger area from the sides. Suitable hard
guards must be provided.
➢ When assembling, ensure that it is impossible to pass onto the housings of the
optical components (thereby allowing entrance into the danger area).
Positioning behind corresponding cutouts on the hard guards on the sides prevents
stepping onto transmitter or receiver housings.
➢ Consider the position of the last light beam before the machine. It must not be
possible to stand undetected between this light beam and the machine. See
Chapter 6.1.4.
Special notes on mounting a SIMATIC FS400 3RG7845 light grid for access and
perimeter guarding:
➢ Calculate the safety distance according to Chapter 6.1.3.
➢ Consider the beam heights as set out in Table 6.1-1, i.e. with 2-beam light grids the
lowest beam is 400 mm above the reference level; with 3 and 4-beam light grids it
is 300 mm above the reference level.
➢ If light curtains are used as access guarding the lowest beam is also 300 mm
above the reference level. The highest light beam and consequently the protective
field height is determined by the requirements in accordance with EN 294/ISO
13857.
➢ Access and perimeter guarding may only be operated with the start/restart interlock
function. Activate the internal RES function internal or the RES function of a
downstream interface and check to make sure it is working properly.
➢ Ensure while installing the start/restart button, that it is impossible to press this
button from inside the danger area. Make sure, that from the location of the button
there is a complete overview over the danger area.
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