User's Manual

Installation guidelines
3 – 2 D101583 0207 BL ident
Overview
Because of the inductive operating principle of the data carriers and
read-write heads, every type of metal (particularly iron and
ferromagnetic materials) should be avoided in proximity of these
devices, as they will influence the manner in which they function.
It is necessary to observe the following important points during
engineering and installation:
 Minimum distance between read-write heads
 Minimum distance between two adjacent data carriers (see
chapter 2, page 2 - 6)
 Metal-free areas with installation of read-write heads and data
carriers on metals
 Installation of several read-write heads on metal frames or
metal supports.
Reduction of metallic influences
Problem: A metal support is located above the transfer zone of the
read-write head. This influences the entire field. Specifically, the
transfer zone between read-write head and data carrier is reduced
(Fig. 1).
Figure 1
Interfering metal
supports.
metal core
data carrier
read/write head
non-metallic spacer
plate