Safety Distance - Panasonic SF4B-H12C Instruction Manual

2-3-2 Safety Distance

● Calculate the safety distance correctly, and always maintain the distance which is equal to or
greater than the safety distance, between the sensing area of this device and the dangerous
parts of the machine. If the safety distance is miscalculated or if sufficient distance is not main-
tained, the machine will not stop quickly before reaching to the dangerous parts, which can re-
sult in death or serious injury.
● Before designing the system, refer to the relevant standards of the region where this device is to
be used, and then install this device.
Furthermore, the equation described in the next pages is to be used only in case the intrusion
direction is perpendicular to the sensing area. In case the intrusion direction is not perpendicu-
lar to the sensing area, be sure to refer to the relevant standard (regional standard, specification
of the machine, etc.) for details of the calculation.
● The max. response time of the machine is from the point that the machine receives the halt
signal from this device to the point that the dangerous parts of the machine stops. The max. re-
sponse time of the machine should be timed with the machine to be actually used.
● The size of the minimum sensing object for this device varies depending on the case whether
the floating blanking function is applied or not. Calculate the safety distance with the proper size
of the minimum sensing object and appropriate equation.
<Size of minimum sensing object when applying floating blanking function>
SF4B-H□C□
(20mm-beam channel pitch type)
SF4B-A□C□
(40mm-beam channel pitch type)
Note: Refer to "3-8 Functions Using Handy Controller (SFB-HC) (Optional)" for details of the floating
blanking function.
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 an object can reach the dangerous parts.
The safety distance is calculated based on the equation described in the next page when a per-
son moves perpendicular (normal intrusion) to the sensing area of the device.
Dangerous part
© Panasonic Industrial Devices SUNX Co., Ltd. 2014
Ramco National
WARNING
Floating blanking function
Invalid
1 beam channel
ø25mm ø45mm
ø45mm ø85mm
Safety distance S
800-280-6933 | nsales@ramcoi.com
Protection Area
Setting (Note)
2 beam channel 3 beam channel
ø65mm ø85mm
ø125mm ø165mm
Sensing area
Intrusion direction
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