Reer JANUS - INTRODUCTION; Safety Warnings; Application Areas

8540573 • 16/09/2016 • Rev.20 3
INTRODUCTION
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This symbol indicates an important personal safety warning. Failure to comply with the
warning may result in very high risks for exposed personnel.
The JANUS safety light curtain is a multi-beam opto-electronic safety system of the Type 4
category of electro-sensitive devices (in accordance with IEC 61496-1,2; EN 61496-1) – if
necessary equipped with MUTING function (“M” models) - for the protection of persons exposed
to dangerous machines or plants.
The two PNP auto-controlled static outputs permit connection of the light curtain to a control
system complying with the requirements and level of safety required for the application.
The light curtain integrates the start/restart interlock and EDM functions (control of external relays
K1 and K2). In this way, the light curtain can be connected to a simple pair of relays or external
safety contactors without having to install additional modules.
A diagnostic display on the Emitter and Receiver provide the information required for correct use
of the device and to check for any operating faults.
The diagnostic output (see TROUBLESHOOTING, page 42) makes it possible to obtain weak
signal and light curtain status information from a single wire.
JANUS is ideal for protecting:
 automatic palletizing/depalletizing systems
 materials handling and storage systems;
 packing and packaging machines;
 assembly lines;
 industrial automatic warehouses;
 AGV transit openings;
 metal, wood, marble and glass tool machines;
 presses, die cutting machines.
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For problems regarding safety, if necessary, consult the competent safety authorities of
your country or the related industrial association.

For applications in the food industry, consult the manufacturer to check compatibility
between the materials of the light curtain and the chemical agents used.

The guarding function of opto-electronic safety devices is not effective in the case in
which the machine cannot be electrically controlled and is unable to stop the dangerous
movement immediately at any time during the work cycle.