Panasonic ST4 Series Instruction Manual page 50

Functions
<Installation condition example of muting sensor>
Guard
Guard
1) Shorten the distances between muting sensors A to A' and between B to B' than the whole
length of the sensing object.
2) The time of the sensing object to be passed through the muting sensors A to B shall be under 3
sec.
Distance between A and B (m) < S (m/sec.) × 3 (sec.)
S: The moving speed (m/sec.) of the sensing object
3) The time of the sensing object to be passed through the muting sensors A' to B' shall be under
3 sec.
Distance between A' and B' (m) < S (m/sec.) × 3 (sec.)
S: The moving speed (m/sec.) of the sensing object
4) The muting sensors A and A' are the PNP output type sensors.
The muting sensors B and B' are the NPN output type sensors.
50
Muting sensor B
Muting sensor A
S (m/s)
Sensing object
2
Safety zone
© Panasonic Industrial Devices SUNX Co., Ltd. 2016
ST4-A□
Muting sensor A'
Muting sensor B'
1
1
3
Dangerous zone