Pilz PSEN op4F-A-14-180/1 - Manual (Page 5)

OPERATING MANUAL PSEN op4F/H-A series
1003067-EN-02 5
1 GENERAL INFORMATION
1.1 General description
1.1.1 General description of the safety light curtain
The safety light curtains in the PSEN op4F/H-A series are multibeam active optoelectronic
protective devices for work areas in which machines, robots and automated plants in general
could endanger the physical integrity of operators who could come into contact with moving
parts, even if only by chance.
Light curtains in the PSEN op4F/H-A series are designed as inherently safe Type 4 systems
for accident prevention in accordance with applicable international safety standards, in
particular the following:
IEC 61496-1 : 2004 Safety of machinery: Electrosensitive protective equipment. Part 1:
General requirements and tests.
IEC 61496-2: 2006 Safety of machinery: Electrosensitive protective equipment –
Particular requirements for equipment using active optoelectronic protective devices.
A light curtain pair consists of a transmitter and a receiver. They produce an infrared
protected field, which is able to detect an opaque object within the specific resolution. Both
the transmitter and the receiver have control and monitoring functions. The connections are
made via an M12 connector, which is located in the lower profile area. The transmitter and
receiver are synchronised optically, so the two units do not have to be connected directly to
each other. The infrared beams that are transmitted and received are controlled and
monitored via a microprocessor, which provides the user with information about the operating
state of the light curtain via LED indicators (see Chapter 8).
A light curtain pair consists of 2 units, which may comprise one or more transmitter and
receiver modules, depending on the respective model. The receiver is the main control unit
for all functions. If an error occurs, it checks all the safety actions and decides on the
measures that are to be implemented in terms of safety, as well as performing other general
functions.
During the installation phase the user interface makes it easier to align the two units (see
Chapter 5).
As soon as the beams emitted from the transmitter are interrupted by an object, a limb or the
body of an operator, both output signal switching devices (OSSD) are opened immediately.
This controls the stopping of the corresponding machine, which is connected to the OSSD.
Some parts or paragraphs of this manual, which are of particular importance to the user or
installation engineer, are highlighted as follows:
The information contained in paragraphs marked by this symbol is
particularly relevant to safety and is important for accident
prevention.
This information must be read with particular attention and must be
strictly observed.