F3S-A
j
j
j
j
P
F3S-A
j
j
j
j
P
16
Precautions
WARNING
Do not use the F3S-A
j
P on a machine that cannot be stopped
by electrical control in an emergency.
J
CALCULATING THE SAFETY DISTANCE
WARNING
Always maintain a safety distance for industrial machines of
prEN999 between the F3S-A
j
P and dangerous machine
parts.
Serious injury may result if equipment does not stop before
someone reaches a dangerous part.
•
Safety distance (D) is calculated by the following equations:
The minimum distance is 100 mm (3.94 in).
D = 2,000 x T +
α
In the case of D
≦
500 mm (19.69 in)
D = 1,600 x T +
α
In the case of D
>
500 mm (19.69 in)
Where, D = Safety distance (mm)
T = Response time (Stop time of the
m Response time of the F3S-A
j
P)
(sec)
α
= 8 mm: 10 mm-pitch (Type F3S-A
j
1P)
88 mm: 20 mm-pitch (Type F3S-A
j
2P)
Emitter
Optical axis
Receiver
S
af
et
y
di
st
anc
e
S
(m
m
)
Machine stop time (s)
F3S-A
j
2P
F3S-A
j
1P
WARNING
Install the F3S-A
j
P so that you must pass through the detec-
tion zone to reach the dangerous machine parts.
Also install the F3S-A
j
P so that you must interrupt the axes to
reach the dangerous machine parts.
J
INSTALL CORRECTLY
Correct Installation
Dangerous machine parts can be
reached only by passing through
the F3S-A
j
P detection zone.
Incorrect Installation
Dangerous machine parts can be
reached without passing through the
F3S-A
j
P detection zone.
A worker is between
the F3S-A
j
P detec-
tion zone and danger-
ous machine parts.
Be sure to install the F3S-A
j
P to minimize the effects of re-
flections from reflective surfaces.
Failure to do so will cause detection to fail and may result in
serious injury.
WARNING
Side View
Top View
Reflective ceiling
Emitter
Detection zone
Reflective floor
Receiver
Reflective surface
Emitter
Receiver
Allowable Distance from F3S-A
j
j
j
j
P to Reflective Surface
Allo
wa
bl
e
in
sta
lla
tio
n
Distance between emitter and receiver L (m)
Install in this area
Do not install in this area
di
stance
D
(m)
Distance between the emitter
and receiver
(detection distance L)
Allowable installation
distance D
0.2 to 3 m (7.87 in to 9.84 ft)
0.16 m (6.30 in)
3 to 5 m (9.84 ft to 16.40 ft)
L x tan3
°
= L x 0.052 (m)
(2.05 in)
!
!
!
!
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