Function Description; Basic Function - Pilz PSEN opII4B Series Operating Manual

PSEN opII4B Series

Function description

Basic function

The safety light curtain consists of a transmitter and a receiver.
Their shape and design
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protect the transmitter and receiver from external damage
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protect the safety light grid from malfunctions caused by vibration (see
environmental data section [
The protected area is covered by infrared light beams, which are emitted from the transmit-
ter to the receiver. The protected field thus produced is able to detect an opaque object.
The control and monitoring of the transmitted and received infrared rays is performed by
microprocessors.
The output signal switching devices (OSSDs) switch to the OFF state when one of the fol-
lowing conditions is met:
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One or more light beams are interrupted by an object, a body part, or an opaque object
that is at least as large as the resolution covered by the safety light curtain (170 mm or
300 mm, see
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A fault is detected in the safety light curtain,
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Stray light is detected.
If a fault occurs, the OSSDs remain in the OFF state. The state can be returned to the ON
state only after a successful
The safety light grid in the PSEN opII4B Series offers the following functions:
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Automatic start
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automatic restart
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Operation of 2 safety light grids that are parallel to one another and are installed with the
same orientation (noting the information in
separation of parallel, aligned safety light grids [
Transmitters and receivers are each electrically connected with a cable with an M12 con-
nector that is assigned to the transmitter and receiver on the LED side.
The transmitter and receiver are optically synchronised and therefore need not be directly
connected to each other.
Information about the operating status of the safety light curtain and any error state is
provided by means of LEDs.
The indicators are described in the section:
Operating Manual PSEN opII4B Series
1005005-EN-02
43]).
Technical details [ 43]),
restart [ 38] of the safety light grid.
ambient conditions [
18])
Status information [
Technical details,
18] and minimum
36].
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