Rockwell Automation Publication 445L-IN005A-EN-P - May 2018
11
GuardShield Micro 400 Safety Light Curtains
Figure 12 - Two Segment, L-shaped Cascaded System
Three Segment GuardShield Cascading Systems
When the use of corner mirrors is not practical or possible, three-sided
guarding of a machine hazard is possible using cascading GuardShield
Micro 400 light curtains.
Figure 13
shows the top and bottom mounting of three GuardShield
Micro 400 segments is possible, which provides three-sided machine
guarding without the use of corner mirrors.
Figure 13 - Three Segment, U-shaped Cascaded System
Mounting and Alignment of Cascading GuardShield
In a cascading system, only the LEDs of the segment closest to the
controller are working. LEDs of other segments don’t work.
Micro 400 IP69K
The GuardShield Micro 400 IP69K meets the requirements of
Protection Classes IP65, IP66, IP67, IP68, and IP69K to IEC 60529
standards.
The tubes around the GuardShield Micro 400 have no influence on
either operation range or safety class as per IEC/EN 61496-1.
Mounting kits are provided which attach to the connection and end
module of the tube. The Micro 400 IP69K is supplied with the two
mounting brackets. Do not rotate end or connection cap (danger of
bending the light curtain).
The polycarbonate enclosure must be cleaned regularly and when dirty.
1. Do not use any powerful cleansing materials.
2. Do not use any abrasive cleansing materials.
3. Due to static charge, dust particles remain attached to the
polycarbonate enclosure. You can alleviate this effect by using an
anti-static plastic cleansing agent that is applied with an anti-
static cloth for cleaning.
4. Clean polycarbonate enclosure as follows:
– Remove dirt on the enclosure using ample quantities of
water. In that way, you avoid scratching the surface.
– Then wipe off with a clean, slightly damp cloth.
– Finally, dry the plastic tube with a clean cloth.
5. Short time (max 2 min) with 80 °C (176 °F) warm water
washable.
After every cleaning process, note the following:
• Remove water residues on the enclosure.
• Wipe the tubes with a clean cloth.
• Check position of transmitter and receiver to confirm that
excessively loose or excessively tight grip or movement to the
back by the safety device is not possible.
• Check safety function of the protective device
The connection plug has to be mounted away from high-pressure water.
Table 2 - Material Specifications
IMPORTANT
It helps to align the cascading segments in a particular order.
First connect the last segment (segment with one connector)
closest to the control unit. Once the LED in the edge is green;
secure mounting brackets of that pair. Next connect middle
segment to the last segment and connect to the controller.
When middle segment receiver LED is green, secure those
brackets. Finally connect the closest segment to the other
segments and connect all together to the controller.
Only the diagnosis LED of the first segment displays the
protective field status. The LEDs of other segments stay off.
For aligning a cascaded system, the optical interface module
(see
Accessories on page 22
) can be a valuable alignment aid.
Attribute
Value
Protection Class (IEC 60529)
Tube:
Plug:
IP65, IP66, IP67, IP68, IP69K
IP65
Material:Connector and closure caps
POM (Polyoxymethylene)
Plastic tube
Polycarbonate
Cable screw fitting
PA6 (Polyamide 6)
O-rings (seals)
NBR (Nitril-Butadien-Rubber)
Mounting brackets
V2A [1.4301 (X5CrNi18-10)]
Pigtail cable
PVC
M12 Plug
Nickel-plated brass copper