Rockwell Automation 445L GuardShield Micro 400 Safety Light Curtain User Manual - Manual (Page 8)

R
GuardShield™ Micro 400 Safety Light Curtain User Manual
6
Original instructions
Restoring the GuardShield Micro 400 sensing field, (in Guard only
configuration) causes all safety outputs (OSSDs) of the connected
controller to switch to the active high state (resume current
sourcing +24V DC).
The GuardShield Light Curtain
The GuardShield Micro 400 safety light curtain consists of a
transmitter and a receiver.
Figure 1: Components of the GuardShield Micro 400
The protective field is between the bottom of the top end cap and
the area above the status LEDs.
The width of the protective field is derived from the length of the
light path between transmitter and receiver and must not exceed
the maximum rated width of the protective field 0…5 m (0…16.4
ft).
Cascading
The GuardShield, Micro 400 POC is also available in cascading
segments which allow a number of GuardShield Micro 400
transmitters and receivers to be interconnected. This product
configurability allows the GuardShield Micro 400 to protect
multiple sides of a machine or simply adds flexibility when
positioning the GuardShield Micro 400 in various applications.
Figure 2: Up to three GuardShield Micro 400 segments can be interconnected. For limitations
see text.
Standard GuardShield Micro 400 cascading segments are offered
in protective heights from 300…1200 mm (11.8…47.2 in.) in both
14 mm (0.55 in.) and 30 mm (1.18 in.) resolutions.
A maximum of three GuardShield Micro 400 light curtains can be
interconnected (maximum two cascades plus one standard
GuardShield Micro 400). The maximum number of beams in a
cascading system is 255 beams. The individual segments can have
mixed resolutions, i.e., 14 mm and 30 mm as long as the pairs
have the same protective heights and resolutions. The maximum
cable length from the control unit to the last beam can be 10 m.
Cascading segments cannot be used as standalone light curtain
pairs.
However, if using multiple cascaded pairs or only one, the last pair
in the cascaded system must be a standard GuardShield Micro
400 light curtain.
The following limitations need to be considered:
• A maximum of 255 light beams per controller
• 10 m maximum total length for light curtains, extension
modules and connection cable combined (Figure 2)
• Only a Rockwell patchcord (445L-AC8xxx) may be used
between the light curtains and the controller. A patchcord is
required to connect the M12 connector of the Micro 400 to
either the MSR41 or MSR42 controller. The patchcord has an
8-pin M12 on one end and an RJ45 connector on opposite end.
Examples of Range of Use
The GuardShield Micro 400 safety light curtain operates as a
proper protective device only if the following conditions are met:
• The control of the machine must be electrical.
• The controlled machine must be able to be stopped any where
in the machines stroke or cycle.
• The transmitter and receiver must be mounted such that
access to the hazard is only through the light curtain’s
protective field.
• If used as an access device, the restart button must be located
outside the hazardous area such that it can not be operated by
a person working inside the hazardous area.
• The statutory and local rules and regulations must be observed
when installing and using the device.
IMPORTANT
Operating mode as manual or automatic restart
(reset), EDM (external device monitoring),
blanked beams or overriding of the
GuardShield Micro 400 are controlled from the
connected safety controller (e.g. MSR42). For
details see user manual of the connected safety
controller.
Transmitter
(white)
Receiver
(blue marking)
Patchcords
Last segment pair
must be a standard
Micro 400 pair