Safety Light Curtain
Safety Light Curtain
Safety Light Curtain
Safety Light Curtain
F
F
F
F
F
F
F
F
3333
3333
S
S
S
S
S
S
S
S
N
N
N
N
N
N
N
N
ssss
ssss
eeee
eeee
rrrr
rrrr
iiii
iiii
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ssss
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No. ST2-015031A -6-
1.2.3. Restart interlock
This function keeps OSSD outputs in the OFF-state, which means interlock condition, after a
beam is interrupted. Resetting during no interruption in the detection zone can release the
interlock condition.
[Direction for use]
Activation of the interlock function needs the wiring of “Manual reset mode” for the interlock
selection input line and the reset input line (Refer to 1.2.1).
It is possible to release the interlock by applying 24 V (for PNP type) or 0V (for NPN type) to
the reset input line and by making the line open subsequently.
[Application]
When you want to keep stopping a machine until you confirm its safety and get ready to re-
start it every time a beam is interrupted, this function is available.
Timing chart of the restart interlock (PNP type)
Power
Light/Dark
OSSD outputs
Reset input
Interlock
indicator
- Start interlock is assumed invalid.
- t
OFF
: ON
Æ
OFF response time of the OSSD outputs
L
D
L
OFF
ON
t
OFF
x 4 or longer
D
L
OFF
ON
OFF
D
L
ON
OFF
ON
ON
24 V
