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F3SP-U4P-TGR
User's manual
9
4 PRECAUTIONS AND INSTALLATION CRITERIA.
The safety products used must be suitable for the required application,
other influences must also be taken into account such as room
temperature, electromagnetic interference, intense light sources etc.
Please refer to the manual for specification or contact the manufacturer for
details.
4.1
CALCULATION OF THE MINIMUM INSTALLATION DISTANCE.
The safety distance ‘S’ must be sufficient to guarantee that the hazardous
area cannot be reached by the operator up to the moment in which the
hazardous movement stops. Please refer to EN999 or corresponding C-
standards and the safety light curtain’s instruction manual;
The EN 999 uses this general formula
S = ( K x T ) + C
S
= safety distance.
T
= T1 + T2 +T3
whereas T1 = machine response time in seconds.
T2 = light curtains response time in seconds.
T3 = controller response time in seconds.
K
= speed of the body approaching the hazardous area.
C
= additional distance calculated or defined based on the optical resolution of the
light curtain.