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Product description
3.1
Setup and function
Overview
The multiple light beam safety device deTem4 LT Muting A/P is an electro-sensitive pro‐
tective device (ESPE) consisting of a sender and receiver unit (hereinafter referred to as
the active unit) and a deflection unit (hereinafter referred to as the passive unit). The
sender and receiver unit is located in the same housing.
The hazardous area is protected by the infrared light beams between the active unit
and the passive unit on the opposite side. The infrared beams of the active unit hit the
passive unit and are sent back to the active unit with a parallel offset.
When one or more light beams are completely interrupted, the protective device reports
the interruption in the light path to the secure output signal switching devices (OSSDs)
by a signal change. The machine or its control must safely analyze the signals (for
example using a safe control or safety relays) and stop the dangerous state.
The deTem4 LT Muting A/P multiple light beam safety device is used for muting applica‐
tions, i.e. for temporarily bridging the electro-sensitive protective device. Muting arms
are mounted on the active and passive units for this purpose. Two muting sensors are
attached to each muting arm for the active unit, and two reflectors on each muting arm
for the passive unit. The muting sensors perform the task of distinguishing between
people and materials. This enables materials to be transported into or out of a haz‐
ardous area without interrupting the work process. Depending on the number of muting
arms and the muting sensors attached to them, it is possible to perform either exit
monitoring or entry/exit monitoring.
Figure 1: Active and passive units
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PRODUCT DESCRIPTION
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O P E R A T I N G I N S T R U C T I O N S | deTem4 LT Muting A/P
8024802/2020-07-17 | SICK
Subject to change without notice