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IUH-F190-V1-*, IUT-F190-R4-V1*
Installation
During simultaneous operation of several read/write heads, only one read/write head may ever
communicate with a tag at any given time. When arranging the read/write heads, make sure
that the measurement ranges do not overlap. You can enlarge or reduce the size of the mea-
surement range by changing the transmitting power. Determine the measurement range of
each read/write head at the mounting location.
Note
During mounting, take into account how the read/write heads may cause interference with each
other. The further the transmission channels of the read/write heads are from each other, the
lower the risk of interference.
If you want to transmit with just one read/write head at any given time, use the multiplex mode
of the IDENTControl control interface. Multiplex operating mode allows chronologically exclu-
sive access to tags, and prevents mutual interference from read/write heads. For a precise
description, see the manual for your control interface.
4.3.3
Polarization
The polarization of the electromagnetic wave emitted by an antenna depends on the type of
antenna and is defined for the electromagnetic field component of the electromagnetic wave.
Polarization can be either linear or circular. In the case of an electromagnetic wave with linear
polarization, the direction of the vector of the electromagnetic field component is spatially con-
stant and therefore dependent on the position of the antenna. Linear polarization can be either
vertical or horizontal.
To achieve the maximum detection range for a UHF system, the polarization of the read/write
head must match the polarization of the tag so that both have the same spatial orientation.
Refer to the relevant data sheet to find the polarization of the tag.
The integrated antenna of the read/write head has dual linear polarization. The read/write head
operates in combined mode by default. In combined mode, both horizontal and vertical polar-
ization are used for each read/write access. This increases the reading reliability of tags with an
unknown location in the room.
If the orientation of the tags is known, you can optimize the access time by setting a fixed polar-
ization. To do this, you can switch the polarization to horizontally linear polarization or vertically
linear polarization in the software. The linear polarization plane refers to the preferred mounting
direction with the cable connection mounted vertically downwards.
Figure 4.3
4.4
Connection
Connect the IUH-F190-V1-* read/write head to the IDENTControl control interface using a
shielded cordset (see chapter 3.9.3). Ensure that the shield fully encapsulates the connection
cable to avoid EMC interference. (see chapter 4.5)
Connect the IUT-F190-R4-V1-* read/write head to the higher level control unit using a shielded
cordset. Ensure that the shield is fully encapsulating so that interference is dissipated via the
protective earth connections to avoid EMC disturbances.
= Vertical polarization plane
1
= Horizontal polarization plane
2
33
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