Rockwell Automation 445L GuardShield Safe 4 and Safe 4 PAC Safety Light Curtains User Manual - Manual (Page 6)

R
GuardShield™ Safe 4 Safety Light Curtain User Manual
4
Original instructions
The protective field height is between 120 mm (4.7 in.) and 1920
mm (75.6 in.).
The maximum protective field width of GuardShield Safe 4 PAC (2,
3, and 4 beam) is 5…30 m (16.4…98.4 ft).
All standard GuardShield Safe 4 POC and PAC light curtains have
Integrated Laser Alignment.
The device is a Type 4 ESPE as defined by IEC 61496-1 and CLC/TS
61496-2 and is therefore allowed for use with controls in safety
category Type 4 in compliance with EN ISO 13849, SIL CL3 in
accordance with EN62061 or up to PLe 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 6 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 Safe 4 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 (2009/104/EC)
• 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 Safe 4 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.
Please read this section before mounting, installing and
commissioning the unit.
Special Features
• Integrated laser alignment
• Large range with a compact profile
14mm resolution: 0…9 m
30mm resolution: 0…18 m or 5…30 m
• Tolerant to dust and pollution
• Short-circuit protected semiconductor outputs
• Built-in-diagnostic LEDs
• Optical synchronization, no electrical cable needed
between transmitter and receiver
• Maintenance-free and cost effective
Principles of Operation
The GuardShield Safe 4 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 Safe 4 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 Safe 4 status LEDs. This beam is
referred to as the synchronization beam. Because the GuardShield
Safe 4 transmitter and receiver are optically synchronized, no
electrical connection is required between the transmitter and
receiver.
The GuardShield Safe 4 receiver has two safety outputs, Output
Signal Switching Devices (OSSDs). When the GuardShield Safe 4
transmitter and receiver are properly powered and aligned, all
OSSDs are current sourcing +24V DC with a switching capacity of
300 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).
IMPORTANT
Safety Notes
Please observe the following items in order
to ensure the proper and safe use of the
GuardShield Safe 4 safety light curtain.