Introduction
Englisch, Revision 14, Date: 07.02.2017
6
1.2
Function
As the antenna passes over the transponder, it energizes the latter with an energy field
of 13.56 MHz. The transponder returns its code through frequency modulation to the
antenna. An additional coil generates the positioning pulse. The interpreter which is
integrated within the antenna decodes the transponder code.
Furthermore several antenna parameters, e. g. current consumption and supply volt-
age, are measured and, if desired, added to the serial output protocol.
The serial signal is made available via potentially separated RS 422 or RS 232 inter-
faces. In addition, the positioning pulse is dc-insulated. Furthermore, CAN Bus or
Profibus interfaces are provided optionally. The following variants are available, they
can be distinguished by the second to last character of the product number, e.g.
HG G-98780
Z
A.
As an option, the serial signal can be converted into a 16 bit parallel output signal
(24 Volts switched) for the code within an external interface device. This interface de-
vice is suited for mounting rail (top-hat rail) installation and should be installed in a
place protected from any environmental influences (see section 4.3 on page 27).
1.3
Positioning Pulse
For the generation of the positioning pulse, it is necessary that the following precondi-
tions are met:
-
The reception voltage S (refer to Table 20 on page 31) must exceed the set
threshold for
Level for Positioning
(refer to section 5.2.2.2 on page 33).
-
A transponder code must be decoded without error.
HG G-98780?A
Variant
Profibus
CAN Bus
RS 422
RS 232
ZA
X
X
YA
X
X
XA
X
X
WA
X
X
UA
X
X
Similar to variant XA but with 4 m cable tails:
-
1 x Power/Serial
-
Additionally the following connector options can be ordered
-
1 x Profibus & 1 x Profibus Terminating Resistor
If the antenna is to be the last device on the Profibus
-
2 x Profibus
If further devices follow on the Profibus
Table 1
Overview of HG G-98780-A variants
