Rockwell Automation 445L GuardShield Safe 4 and Safe 4 PAC Safety Light Curtains User Manual - Manual (Page 7)

R
GuardShield™ Safe 4 Safety Light Curtain User Manual
5
Original instructions
Restoring the GuardShield Safe 4 sensing field causes all outputs
(OSSDs) to switch to the active high state (resume current
sourcing +24V DC with a switching capacity of 300 mA).
GuardShield Safe 4 operates in the guard only mode with
automatic restart. Other modes of operation e.g. PSDI mode
(break mode), muting, external relay monitoring (EDM) can be
realized using external safety devices.
The GuardShield Safe 4 safety light curtain consists of a
transmitter and a receiver.
Figure 1: Components of the GuardShield Safe 4
The protective field and the active elements respectively, are
clearly recognized as black surfaces with the integrated optical
lenses.
The width of the protective field is derived from the length of the
light path between sender and receiver and must not exceed the
maximum rated width of the protective field
• (0…9 m (22.9 ft) for 14 mm (0.55 in.) resolution, or
• 0…18 m (59.1 ft) for 30 mm (1.18 in.) resolution, or
• 5…30 m (16.4…98.4 ft) for 30 mm (1.18 in.) resolution.
Perimeter Systems (PAC)
Perimeter systems are usually produced by means of several
single-beam light barriers. But the flexibility of the GuardShield
Safe 4 system allows also the production of vertical entry
safeguarding according to the standard EN ISO 13855 [2010].
Such systems are composed of active and passive elements in one
compact profile. The element length of each is 120 mm (variations
are given in the appendix).
The protective field and the active elements respectively, are
clearly recognized as black surfaces with the integrated optical
lenses. The areas not monitored (passive elements) are also clearly
indicated as yellow surfaces.
Figure 2: Perimeter systems (2-, 3-, and 4-beams) according to EN ISO 13855 (2010)
Transmitter Receiver
300
900
Reference plane (e.g. ground)
0
300
1100
Reference plane (e.g. ground)
0
700
300
1200
Reference plane (e.g. ground)
0
600
900