Datalogic SG4 Extended Series - Distance between Homologous Devices

INSTALLATION
14 SG4 EXTENDED
It is important to position the safety light curtain according to the minimum distance
from reflecting surfaces.
The minimum distance depends on:
• operating distance between emitter (TX) and receiver (RX);
• real aperture angle of ESPE (EAA); especially:
for ESPE Type 4 EAA = 5° (α =
± 2.5°)
Figure 6 - Minimum distance from reflective surface
The formula to get Dsr is the following:
For ESPE Type 4:
Dsr (m) = 0.13 for operating distance < 3 m
Dsr (m) = 0.5 x operating distance (m) x tg 2° for operating distance ≥ 3 m
Distance between homologous devices
The following graphic shows the distance from the interfering devices (Ddo) according
to the operating distance (Ddo) of the couple (TXA – RXA).
If different safety devices have to be installed in adjacent areas, the emitter of one
d
evice must not interfere dangerously with the receiver of the other device.
The TXB interfering device must be positioned outside a minimum Ddo distance from
the TXA
– RXA emitter-receiver couple axis.
Figure 7 - Distance between homologous devices