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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.
Transmitter
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.
900
300
0
Reference plane (e.g. ground)
R
Receiver
Original instructions
GuardShield™ Safe 4 Safety Light Curtain User Manual
1100
700
300
0
Reference plane (e.g. ground)
1200
900
600
300
0
Reference plane (e.g. ground)
Figure 2: Perimeter systems (2-, 3-, and 4-beams) according to EN ISO 13855 (2010)
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