Instruction Manual
SG2 EXTENDED
1
1. GENERAL
INFORMATION
1.1. General description of the safety light curtains
The safety light curtains of the SG2 series are optoelectronic multibeam devices that are used to
protect working areas that, in presence of machines, robots, and automatic systems in general, can
become dangerous for operators that can get in touch, even accidentally, with moving parts.
The light curtains of the SG2 series are Type 4 intrinsic safety systems used as accident-prevention
protection devices and are manufactured in accordance with the international Standards in force for
safety, in particular:
CEI IEC 61496-1:
2004
Safety of machinery: electrosensitive protective equipment. Part 1:
General prescriptions and tests.
CEI IEC 61496-2:
2006
Safety of machinery: electrosensitive protective equipment - Particular
requirements for equipment using active optoelectronic protective
devices.
The device, consisting of one emitter and one receiver housed inside strong aluminium profiles,
generates infrared beams that detect any opaque object positioned within the light curtain detection
field.
The emitter and the receiver are equipped with the command and control functions. The connections
are made through a M12 connector located in the lower side of the profile.
The synchronisation between the emitter and the receiver takes place optically,
i.e.
no electrical
connection between the two units is required.
The microprocessor guarantees the check and the management of the beams that are sent and
received through the units: The microprocessor LEDs inform the operator about the general conditions
of the safety light curtain (see section 7 “
Diagnostic functions
”).
The device consists in 2 units that, according to the model, are composed by one or several emitting
and receiving modules.
The receiver checks the control operations and safety actions.
During installation, two yellow LEDs facilitate the alignment of both units (see chapter 5 “
Alignment
procedure
”).
As soon as an object, a limb or the operator’s body accidentally interrupts one or some of the infrared
beams sent by the emitter, the receiver immediately opens the OSSD outputs and blocks the MPCE
machine (if correctly connected to the OSSD).
Some parts or sections of this manual containing important information for the operator are preceded
by a note:
Notes and detailed descriptions about particular characteristics of the safety devices in order to better
explain their functioning.
Special instructions regarding the installation process.
The information provided in the paragraphs following this symbol is very important for safety and may
prevent accidents.
Always read this information accurately and carefully follow the advice to the letter.
This manual contains all the information necessary for the selection and operation of the safety
devices.
However, specialised knowledge not included in this technical description is required for the planning
and implementation of a safety light curtain on a power-driven machine. As the required knowledge
may not be completely included in this manual, we suggest the customer to contact DATALOGIC
AUTOMATION Technical Service for any necessary information relative to the functioning of the SG2
light curtains and the safety rules that regulate the correct installation (see chapter 8 “
Periodical
checks
”).
