GuardShield™ Type 2 Safety Light Curtain Installation Instructions
4
R
Original instructions
Range of Uses of the Device
The GuardShield Type 2 safety light curtain is classified as electro-
sensitive protective equipment (ESPE). The physical resolution is 30 mm
(1.18 in.). The maximum protective field width is 18 m (59 ft) for the 30
mm (1.18 in.) resolution GuardShield Type 2. The protective field
height is between 160 mm (6.3 in.) and 1760 mm (69.2 in.).
The device is a
Type 2 ESPE
as defined by IEC 61496-1 and CLC/TS
61496-2 and is therefore allowed for use with controls in safety category
Type 2 in compliance with EN ISO 13849, SIL CL2 in accordance with
EN62061 or up to PLd in accordance with EN ISO 13849. The device is
suitable for:
• Point of operation protection (finger and hand protection)
• Hazardous area protection
• Access protection
Access to the hazardous point must be allowed only through the
protective field. The machine/system is not allowed to start as long as
personnel are within the hazardous area. Refer to the “Examples of
Range of Use” on page 5 for an illustration of the protection modes.
Depending on the application, mechanical protection devices may be
required in addition to the safety light curtain.
Proper Use
The GuardShield Type 2 safety light curtain must be used only as
defined in the “Range of Uses of the Device.” It must be used only by
qualified personnel and only on the machine where it has been installed
and initialized by qualified personnel.
If the device is used for any other purposes or modified in any way,
warranty claims against Allen-Bradley/Guardmaster shall become null
and void.
General Protective Notes and Protective Measures
• The national/international rules and regulations apply to the
installation, use and periodic technical inspections of the safety
light curtain, in particular:
♦
Machine Directive 2006/42/EC
♦
Low Voltage Directive 2006/95/EC
♦
Use of Work Directive 2009/104EC
♦
The work safety regulations/safety rules
♦
Other relevant health and safety regulations
Manufacturers and users of the machine with which the safety light
curtain is used are responsible for obtaining and observing all
applicable safety regulations and rules.
• The notices, in particular the test regulations of these installation
instructions (e.g. on use, mounting, installation or integration into
the existing machine controller) must be observed.
• The tests must be carried out by specialist personnel or specially
qualified and authorized personnel and must be recorded and
documented to ensure that the tests can be reconstructed and
retraced at any time.
• The installation instructions must be made available to the user of
the machine where the GuardShield Type 2 safety light curtain is
installed. The machine operator is to be instructed in the use of
the device by specialist personnel and must be instructed to read
the installation instructions.
Product Description
This section provides information on the special features and properties
of the safety light curtain. It describes the structure and functions of the
unit, in particular the different operating modes.
→
Please read this section before mounting, installing and
commissioning the unit.
GuardShield Type 2 Light Curtain
Principle of Operation
The GuardShield Type 2 safety light curtain consists of a non-matched
pair of optic units, i.e., transmitter and receiver with the same protected
height and resolution. The transmitter and receiver operate on +24V
DC. The maximum distance between transmitter and receiver is referred
to as the protective field width or range. The protective field height is the
distance between the first and last beam in the device.
The transmitter emits sequential pulses of infrared light which are
received and processed by the GuardShield Type 2 receiver. The
synchronization of the timing of the emission and reception of infrared
light pulses is accomplished optically by the first beam adjacent to the
GuardShield Type 2 status LEDs. This beam is referred to as the
synchronization beam. Because the GuardShield Type 2 transmitter and
receiver are optically synchronized, no electrical connection is required
between the transmitter and receiver.
The GuardShield Type 2 receiver has two safety outputs, Output Signal
Switching Devices (OSSDs) and one nonsafety auxiliary output. When
the GuardShield Type 2 transmitter and receiver are properly powered
and aligned, all OSSDs are current so24V DC with a switching
capacity of 500 mA. The two safety OSSDs are cross monitored and
short-circuit protected. Interruption of the sensing field causes the
receiver to switch the sourced current OFF (0V DC).
Restoring the GuardShield Type 2 sensing field, (in Guard only
configuration) causes all outputs (OSSDs) to switch to the active high
state (resume current so24V DC with a switching capacity of
500 mA).
The GuardShield Type 2 Light Curtain
The GuardShield Type 2 safety light curtain consists of a transmitter and
a receiver.
ATTENTION
Safety Notes
Please observe the following items in order to
ensure compliance of the proper and safe use
of the GuardShield Type 2 safety light curtain.