SDKELI BLPS-D3L - Installation of Sensor; Installation Site

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being valid and the gearshift signal is invalid), slow down stroke and back stroke are not
protected.
 Normal mode
Under normal mode, all the protection areas (L1, L2, L3) are effective. Any beam is blocked
in the protective stroke, fast down control output (13/14, 23/24) is cut off to prevent stroke
start or stop it to avoid serious injury.
When the sensor is on the light-passing state, trigger the down going signal and the fast down
control output turns on. If any beam is blocked in the protective stroke, fast down control
output is cut off. Trigger the down going signal again after the detected object is removed and
the bender continues to finish this working stroke.
When the sensor keeps on light-shaded state, trigger the down going signal again, the fast
down control output and the slow down control output
（
33/34
）
turn on at the same time and
the bender will finish the working stroke at the set slow down speed.
If there is no object to block the detecting beam, the upper mold will move to the gearshift
point at high-speed, then the detecting function is muted and the upper mold continues to
work at a safe speed until the completion of the bending stroke.
The normal mode should be selected when the workpiece can not block the detecting beams
before the bender change the speed of the working stroke,such as plate-shaped parts.
Fig.2.7 Operational timing chart of normal mode of SP
 Folding box mode
Under folding box mode, the front protection area of the sensor (L1 ) is shielded and the
central protection area (L1 and L2 ) is effective.
Under folding box mode, the front protection area (L1) is shielded, and the middle protection
area (L2, L3) plays a protective role.
When the central protection area of sensor is on the light-passing state, trigger the down going
signal and the fast down control output turns on. If any beam of the central protection area is
blocked, fast down control output is cut off. When the fast down control output is on, even the
beam of front protection area is blocked, the slow down control output is on; when the fast
down control output is off, whether the beam of front protection area is blocked or no, he slow
down control output is off.