Siemens SIMATIC RF610T ATEX System Manual page 320

Antennas
6.6 SIMATIC RF650A
R R adiation diagram (circular) in the FCC frequency band
Figure 6-45
320
Pattern of the vertical plane of the antenna
Pattern of the horizontal plane of the antenna
Directional radiation pattern of the RF650A in the FCC frequency band
System Manual, 06/2019, J31069-D0171-U001-A22-7618
SIMATIC RF600