Siemens SIMATIC Ident System Manual page 55

To avoid any influence on the field data, in Case d, the distance a should be ≥ 15 mm.
Table 4- 17
Transponder
MDS D124
MDS D126
MDS D160
MDS D324
MDS D422
MDS D423
MDS D424
MDS D425
MDS D426
MDS D428
MDS D460
SIMATIC RF200
System Manual, 07/2015, J31069-D0227-U001-A9-7618
Reduction of field data due to metal, range as %: Transponder and RF220R
metal-free
1)
on metal, distance 15 mm
tag flush-mounted in metal;
distance all round 15 mm
metal-free
1)
on metal, distance 25 mm
flush-mounted in metal;
distance all round 50 mm
metal-free
1)
on metal, distance 10 mm
metal-free
1)
on metal, distance 15 mm
flush-mounted in metal;
distance all round 25 mm
metal-free
flush-mounted in metal;
distance all round 0 mm
metal-free
on metal, distance 0 mm
flush-mounted in metal;
distance all round 10 mm
metal-free
1)
on metal, distance 15 mm
flush-mounted in metal;
distance all round 25 mm
metal-free
screwed onto metal
flush-mounted in metal;
distance all round 25 mm
metal-free
1)
on metal, distance 25 mm
flush-mounted in metal;
distance all round 50 mm
metal-free
on metal, distance 0 mm
metal-free
1)
on metal, distance 0 mm
RF200 system planning
4.3 Installation guidelines
Reader without direct
metal influence
(Case a, b and d)
100
97
86
100
85
80
100
100
100
97
93
100
85
100
125
2)
80
100
96
86
100
100
95
100
90
80
100
100
100
100
Reader flush-
mounted in metal
(Case c)
94
89
83
75
70
65
89
89
90
86
86
90
85
90
115
2)
75
93
89
82
90
75
75
90
75
70
94
94
92
92
55