GuardShield Safe 2 Operation Manual
Operation Manual GuardShield Safe 2
3.3. Application Conditions
The safe application of the light curtain systems
GuardShield Safe 2 needs certain precautions:
1. The control unit of the machine or system must be
able to be electrically stopped and the stop time
must be known.
2. The hazardous moving parts of the machine
must always be stoppable and must achieve a
safe position or complete standstill within the
specified stop time of the machine.
3. When installing GuardShield Safe 2, the only
way to access the hazard must be through the
sensing field of the GuardShield Safe 2.
Figure 3: Correct installation
Figure 4: Incorrect installation
For the professional installation and connection,
please consult the relevant laws and regulations.
The safety officer of the manufacturing facilities,
the local authorities (OSHA in USA, HSE in GB)
or the respective industry associations as well as
the intensively trained employees of ROCKWELL
AUTOMATION are available for any safety related
queries.
3.3.1. Corner mirrors
The protective field between transmitter and receiver
can be guided around a corner using a mirror to
allow safeguarding of two or three hazardous areas.
Note that using one mirror will help reduce maximum
operating range by approx. 15 %.
It is not recommended to use more than two mirrors
due to alignment difficulties that may occur.
As accessories two types of mirrors are available,
with different mounting plates and sizes. Detailed
information is available from ROCKWELL
AUTOMATION.
Figure 2: Typical Applications
6
4. Principles of Operation
The transmitter sends coded infrared light pulses to
the receiver, which evaluates them. If an object e.g.
a hand (30 mm) penetrates the protective field, the
redundant solid state Output Signal Switching Devices
(OSSD) of the receiver switch off to stop the machine.
As soon as the protective field is cleared, both outputs
switch on again (automatic restart).
4.1. Mode of operation
GuardShield Safe 2 operates in the guard only mode
with automatic restart.
4.2. Intelligent Laser Alignment System ILAS
The ILAS is a most convenient feature to make
alignment a pleasure. The ILAS can be activated at
any time during installation or operation. It provides
the possibility to check if the light curtain is still
perfectly aligned.
4.3. Perimeter systems
Perimeter systems are usually produced by means of
several single beam light barriers. But the flexibility
of the GuardShield Safe 2 system allows also the
production of vertical entry safeguarding according to
the standard EN 999. Such systems are composed of
active and passive elements in one compact pro-file.
The element length of each is 120 mm.
The big advantage of GuardShield Safe 2 Perimeter
systems is the easy way of mounting and the
uncomplicated way of starting up the operation. The
time needed to connect the wires and aligning the
optics is drastically reduced in comparison to standard
Perimeter systems consisting of single beam light
barriers, where often mirrors are also included which
can only be positioned with difficulties.
The protective field and the active elements
respectively, are clearly recognized as black surfaces
with the integrated optical lenses. The not monitored
areas (passive elements) are also clearly indicated as
yellow surfaces.
POWER
Transmitter
Power on
(orange)
POWER
Receiver
Power on
(orange)
Output active
(green)
O
utput inactive
(red)
OK
Normal operation
(green)
TEST
Test input
(red)
Optical
(IR light)
Optical
(IR light)
Figure 5: LED Indicators
Figure 6: Perimeter Systems
(2 and 3 beams), accord. to EN999 (1998)
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(28 paginas)
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