KEYENCE SL-V Series User Manual
Page 23
1-3
Part Description
1-11
Befo
1
SL-V-M-NO1-E
Beam center-line : An optical path joining the optical center of the emitting element on the transmitter to
the optical center of the corresponding receiving element on the receiver. the SL-V
must be installed so that the beam center-line mark on the transmitter and that on the
receiver face one another and are located at the same height.
Detection height : The height from the top beam center-line to the bottom beam center-line (length).
Protection height : An object approaching the detection zone from the top of the detection height is first
detected at point A, which is the distance of the detection capability from the top of
the detection height. The equivalent position on the bottom is called point B. The
height from the top edge of the specified detection capability that exists at point A to
the bottom edge of the specified detection capability that exists at point B is called a
"protection height".
The following calculation formula can be defined:
Protection height = "Detection height" + 2 x "the specified detection capability"–"beam
axis diameter".
* Refer to the following diagram for an explanation of beam center-line, detection height and protection height.
Detection zone:
The zone in which the specified detection capability can be detected. The detection zone
of the SL-V indicates a square area formed with the detection height and the operating
distance. When a part or whole of the specified detection capability is present in this area,
the light of the SL-V is blocked, and then the OSSD goes to OFF state.
Protection zone:
The square area formed with the protection height and the operating distance, which
is broader than the detection zone. When a whole of the specified detection capabil-
ity is present in this area, the light of the SL-V is blocked, and then the OSSD goes to
OFF state.
* Refer to the following diagram for detection zone and protection zone.
Specified detection capability (position A)
Specified detection capability (position B)
Protection height
Detection
height
Beam center-line
Beam center-line mark
a
a: Beam axis spacing
b: Beam axis diameter
c: Detection capability
b
c
Protection
height
Specified detection capability
Protection zone
Operating distance
Detection zone
Detection
height