Siemens SIMATIC Ident System Manual page 53

Transponder
MDS D522
Special variant
MDS D524
MDS D528
Mounting the transponder on or in metal is only possible with the appropriate spacer or if there is
1)
adequate clearance to the metal.
Values of > 100 % related to non metal surroundings can occur if transponders were developed
2)
specifically for mounting in/on metallic surroundings.
SIMATIC RF200
System Manual, 07/2015, J31069-D0227-U001-A9-7618
metal-free
flush-mounted in metal;
distance all round 0 mm
metal-free
1)
on metal, distance 15 mm
flush-mounted in metal;
distance all round 25 mm
metal-free
on metal, distance 0 mm
RF200 system planning
4.3 Installation guidelines
Reader without direct
metal influence
(Case a, b and d)
100
90
100
90
85
100
100
Reader flush-
mounted in metal
(Case c)
80
40
60
80
75
90
80
53