IDEC SG4 Type 4 Finger & Hand - Manual (Page 5)

Instruction Manual SG4-B Series
1
1. GENERAL INFORMATION
1.1. General Description of the safety light curtains
The safety light curtains of the SG4 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 SG4 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
”).