Rockwell Automation 445L GuardShield Safe 4 and Safe 4 PAC Safety Light Curtains User Manual - Manual (Page 31)

R
GuardShield™ Safe 4 Safety Light Curtain User Manual
29
Original instructions
Cascaded Systems
Cascading
The GuardShield Safe 4, Type 4 POC is also available in a limited
offering of cascading segments which allow GuardShield Safe 4
transmitters and receivers to be interconnected. This product
configurability allows the GuardShield Safe 4 to protect multiple
sides of a machine or simply adds flexibility when positioning the
GuardShield Safe 4 in various applications.
A maximum of three GuardShield Safe 4 light curtain pairs can be
interconnected with a common pair of OSSDs (not to exceed 255
beams).
Two Segment Cascading GuardShield Safe 4 Systems
Typical configuration of a cascaded GuardShield Safe 4
Figure 23: Cascaded GuardShield Safe 4
Figure 24: “L-shaped” two segment GuardShield Safe 4 cascading systems offer protection
when it is possible to stand between the vertical light curtain and the machine hazard
Three Segment GuardShield Safe 4 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 Safe 4 light curtains.
Figure 25: Top and bottom mounting of 3 GuardShield Safe 4 segments is possible, which will
provide three-sided machine guarding without the use of corner mirrors
Following limitations shall be taken into consideration:
• The protective zone is made of units with 120 mm length
• Ten meter maximum total length for light curtains,
extension modules and connection cables combined
• Maximum of three ILAS may be operated simultaneously
• Only the following extension cable may be used between
the light curtains
It is possible to extend the length of the cable between cascaded
segment pairs, however, it is necessary to use three patchcords to
do this. The standard connection between these special Safe 4
light curtains is a DIN 9 connector. To increase the cable length
between cascaded segment pairs, a DIN 9 to M12 patchcord is
required to connect to the Safe 4 pigtail then an M12 to M12
patchcord connects to the first patchcord. Finally a second M12 to
DIN 9 patchcord is required to make the final connection.
Systems with Separated Controller
Systems with separated controllers are cascaded systems in which
one cascade is without any optical modules. The dead zone of the
protective cascade is minimized this way. The profile length of
light curtains without laser alignment system is 2 x 25 mm
shorter.
Figure 26: GuardShield Safe 4 with separated Controller
PO W ER F
F
445L-AC8CPx
Patchcord, 8 Pin, 1 Meter, M12 to M12
(x = 1, 3 or 5 meter)
445L-ACDN9M12
Patchcord, 8 Pin, Din9/female to M12/
male
445L-109296
Patchcord, 8 Pin, Din9/male to M12/
female
120 (4.72) ±10
45.5 (1.79) 50.2 (1.98)
120 (4.72) ±10
40.5 (1.59) 52.1 (2.05)
Cable
PO W ER
F