Rockwell Automation 442L SC300 Safety Sensor User Manual - Manual (Page 22)

20 Rockwell Automation Publication 10000202762 Ver 00 - January 2012
Chapter 4 Mounting
Avoiding unmonitored areas
Provide separate protection for unmonitored areas.
During the installation of the SC300 safety sensor system,
incorrect mounting or mutual interference between several
systems may result in areas that are not monitored and through
which an operator could reach the hazardous point.
Protect unmonitored areas using mechanical guards.
Note the following warning and precautions to prevent
unmonitored areas.
ATTENTION
Protective field
Housing markings
Unmonitored areas!
Test rod
a
Protective field
Mounting on a frame Mounting in a frame
Avoid mounting in a frame.
In the case if mounting in a frame, due to the principle of
operation unmonitored areas will be produced through which
an operator could reach the hazardous point.
Mount the safety sensor on the frame instead of in the frame
to avoid unmonitored areas from the start (see “Mounting on
a frame” on page 23).
If mounting in a frame is nevertheless necessary, you must
identify the unmonitored areas with the aid of the test rod
and provide protection using mechanical panels.
In the case of mounting in a frame, the unmonitored area
reaches from the inside of the mounting corner to the
position at which the test rod is safely detected (see Figure
10).
ATTENTION
Figure 10 - Avoiding unmonitored areas due to mounting on a frame
Table 8 - Length of the unmonitored area in the case of mounting in a frame
Resolution 20 mm 24 mm 30 mm
Length a of the unmonitored area >0.40 m >0.40 m >0.60 m