Operating Instructions
L 4000 system
Tab. 2: LED displays of the
sensors
Fig. 3: L 400 sensor with
axial optics, centre line
corresponds to beam axis
8010009/TI69/2009-11-26
Product description
Two types of sensors can be connected to the safety evaluation de-
vice UE 401:
L 4000 with a scanning range of up to 60 m,
L 400 with a scanning range of up to 5/10 m.
The sensors only comply with IEC 61 496-1 and IEC 61 496-2 in
conjunction with the safety evaluation device UE 401.
The sensors are fitted in cylindrical housings with an external thread.
These are metal housings with thread M30x1.5 on the L 4000 sen-
sors and plastic/metal housings with thread M18x1 on the L 400
sensors.
Sender and receiver are each equipped with an LED for operational
checks:
Sensor
L 4000/L 400 sender
L 4000/L 400 receiver
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
LED
Illuminates if the sender is active
Illuminates if the light beam is
received; flashes if
sender/receiver are poorly
aligned or the lenses are dirty
Chapter 3
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