Layout Of The Muting Sensors - SICK LE20 Instrucciones De Operación

Chapter 3
Note
3 0 0
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
Product description
To ensure that the muting conditions are satisfied, the object
should pass through the muting light beams and the photoelectric
safety switch in the way described above. If the object moves in
any other way, e.g. it moves into the monitoring zone and then
back out again or it is removed from the monitoring zone, a muting
error occurs and the OSSD outputs of the evaluation unit are
deactivated.
Configuration of the number of muting sensors
The number of muting sensors is configured using wire links at
the BIT 1 and BIT 2 terminals. The wire links must be connected to
BIT 1 or BIT 2 and the adjacent Intercon.+ terminals in accordance
with Tab. 5-2 in Chapter 5.
Configuration of the muting monitoring functions
Configuration of the two muting monitoring functions depends on
the number of connected muting sensors. Configuration is perfor-
med by connecting wire links between the SEQUENCE or CONCURR.
terminals and the adjacent Intercon.+ terminals. Table 5-3 in
Chapter 5 shows how the wire links have to be connected for the
different muting monitoring functions.
3 . 4 . 2

Layout of the muting sensors

The muting sensors must always be arranged in such a way that
the material can be reliably detected and that a person cannot
trigger the muting function. In addition to the general safety
instructions in Chapter 2.3, it is also advisable to observe the
following basic rules:
1 . The material (pallet, carriage ...) must be detected along its
entire length by the muting sensors, i.e. the output signals from
the sensors must not be interrupted. This is especially important
if material is offset on the pallet or if the reference height for
the sensors alters as a result of the transport material being
changed.
2 . The photoelectric safety switch and muting sensors must be
arranged such that the current material can pass the last muting
sensor and all muting sensors are deactivated before the next
material reaches the first sensors.
3 . The sensors should only detect the material and not the trans-
port medium (pallet or carriage) to ensure that personnel cannot
be carried into the hazardous area on the transport medium.
Operating Instructions
Safety Evaluation Unit LE 20
8 008 685/Q913/2007-05-21