Panasonic SF4D Series Instruction Manual page 23

[For use in China (GB 4584)]
For a press machine with a slide that can be stopped at any position, calculate the safety
distance S using Equation 1.
● Equation example 1
S: Safety distance (mm)
Minimum required distance between the sensing area plane and the nearest dan-
gerous part of the machine
K: Intrusion speed of person or object (mm/sec.)
For intrusion horizontal to the sensing area, calculate using 1,600mm/sec.
For intrusion vertical to the sensing area, if the safety distance is S ≤ 500mm, calculate
using 2,000mm/sec. If the safety distance is S > 500mm, calculate using 1,600mm/sec.
T: Overall response time of system (sec.)
T = T
T : Maximum response time of machine (sec.)
m
T : Response time of device (sec.)
SF4D
C: Distance from intrusion of hand into sensing area until detection by this product (mm).
On a press machine, if the interlock (start-restart interlock) function of the device or
a safety controller is not used, calculate using the table below.
Minimum sensing object
> 14 to 20mm
> 20 to 30mm
> 30 to 40mm
On a press machine, if the interlock (start-restart interlock) function of the device or
a safety controller is used, calculate with C = 0.
For a press machine with a slide that cannot be stopped at any position, calculate the
safety distance S using Equation 2.
● Equation example 2
S: Safety distance (mm)
Minimum required distance between the sensing area plane and the nearest dan-
gerous part of the machine
K: Intrusion speed of person or object (mm/sec.)
For intrusion horizontal to the sensing area, calculate using 1,600mm/sec.
For intrusion vertical to the sensing area, if the safety distance is S ≤ 500mm, calculate
using 2,000mm/sec. If the safety distance is S > 500mm, calculate using 1,600mm/sec.
T : Time from insertion of hand into this product until the slide reaches the low dead point (sec)
S
T = [(1 / 2) + (1 / N)] × T
S
N: Number of clutch grooves
T : Time required for one revolution of crankshaft (sec.)
n
C: Distance from intrusion of hand into sensing area until detection by this product (mm).
On a press machine, if the interlock (start-restart interlock) function of the device or
a safety controller is not used, calculate using the table below.
Minimum sensing object
> 14 to 20mm
> 20 to 30mm
> 30 to 40mm
On a press machine, if the interlock (start-restart interlock) function of the device
or a safety controller is used, calculate with C = 0.
© Panasonic Industrial Devices SUNX Co., Ltd. 2017
S = K × T + C
+ T
m SF4D
Additional distance C
≤ 14mm
> 40mm
S = K × T
n
Additional distance C
≤ 14mm
> 40mm
Stroke start by the device or a safety controller
0mm
80mm
130mm
240mm
850mm
+ C
S
Stroke start by the device or a safety controller
0mm
80mm
130mm
240mm
850mm
Protection Area
Possible
Not possible
Possible
Not possible
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