Rockwell Automation 442L SC300 Safety Sensor User Manual - Manual (Page 18)

16 Rockwell Automation Publication 10000202762 Ver 00 - January 2012
Chapter 4 Mounting
Protective field dimensions allowed at a resolution of 24 mm
The lengths of the sides of a protective field monitored must not be shorter than 0.40 m
and not longer than 1.20 m.
Table 6 - Protective field dimensions allowed for a rectangular protective field at a resolution of
24 mm (intermediate values are allowed)
Example 1: The shorter side is 0.43 m long. Then the longer side must be at least 0.43 m
and is allowed to be a maximum of 2 × 0.43 m = 0.86 m long.
Example 2: The shorter side is 0.78 m long. Then the longer side must be at least 0.78 m
and is allowed to be a maximum of 1.20 m long.
Protective field dimensions allowed at a resolution of 30 mm
The lengths of the sides of a protective field monitored must not be shorter than 0.60 m
and not longer than 1.50 m.
Table 7 - Protective field dimensions allowed for a rectangular protective field at a resolution of
30 mm (intermediate values are allowed)
Example 1: The shorter side is 0.63 m long. Then the longer side must be at least 0.63 m
and is allowed to be a maximum of 2 × 0.63 m = 1.26 m long.
Example 2: The shorter side is 0.78 m long. Then the longer side must be at least 0.78 m
and is allowed to be a maximum of 1.50 m long.
Determining the safety distance The safety camera system must be mounted with an adequate safety distance between the
protective field and the hazardous point. This safety distance helps provide that the
hazardous point can only be reached after the dangerous state of the machine has been
completely stopped.
Note If mounted vertically, the protective field is from the centre of the camera lens to the edge
of the reflective tape that is closest to the hazardous point. (The reference point for the
safety distance
S is therefore not the middle of the reflective tape (see Figure 9).)
Shorter side of the protective field
Longer side of the protective field
Minimum Maximum
≥0.40 m … <0.60 m
= shorter side 2 × shorter side
≥0.60 m … ≤1.20 m = shorter side 1.20 m
Shorter side of the protective field
Longer side of the protective field
Minimum Maximum
≥0.60 m … <0.75 m
= shorter side 2 × shorter side
≥0.75 m … ≤1.50 m = shorter side 1.50 m
No protective function without sufficient safety distance.
The reliable protective effect of the safety sensor system
depends on the safety sensor system being mounted with the
correct safety distance from the hazardous point.
ATTENTION