Safety Distance - Panasonic WUME-SF4D-2 Instruction Manual

2-3-2 Safety Distance

● Calculate the safety distance correctly, and install so that the distance between the sensing area
of the device and dangerous parts of the machine is equal to or greater than the safety distance.
If the safety distance is miscalculated or a sufficient distance is not established, the machine will
not be able to stop before a human body or object arrives at a dangerous part, creating a risk of
death or serious injury.
● Before designing and installing the system, refer to the applicable standards of the region where
the device is to be used.
The equations on the following pages are to be used only when the direction of intrusion is per-
pendicular to the sensing area. If the direction of intrusion is not perpendicular to the sensing
area, be sure to check all applicable standards (regional standards, specifications of the ma-
chine, etc.) for calculation details.
● The maximum response time of the machine is from the point that the machine receives the halt
signal from the device to the point that the dangerous parts of the machine stop. The maximum
response time of the machine should be measured using the actual machine to be used.
<Size of minimum sensing object when floating blanking function is used>
SF4D-F□
(Beam pitch 10mm type)
SF4D-H□
(Beam pitch 20mm type)
SF4D-A□
(Beam pitch 40mm type)
Note: For details on the floating blanking function, refer to "3-11 Functions That Can be Set Using the
Optional Communication Module SF4D-TM1".
The safety distance is the minimum distance that must be maintained between the device and
the dangerous parts of the machine so that the machine can be stopped before a human body
or object reaches a dangerous part.
The safety distance is calculated using the equations given on the following pages when a per-
son moves perpendicularly (normal intrusion) into the sensing area of the device.
Dangerous part
© Panasonic Industrial Devices SUNX Co., Ltd. 2016
WARNING
Not set
1 beam
channel
ø14mm ø24mm
ø25mm ø45mm
ø45mm ø85mm
Safety distance S
Floating blanking function
Setting (Note)
2 beam 3 beam
channels channels
ø34mm ø44mm
ø65mm ø85mm
ø125mm ø165mm
Sensing area
Intrusion direction
Protection Area
4 beam 5 beam
channels channels
ø54mm ø64mm
ø105mm ø125mm
ø205mm ø245mm
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