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PDF HTRM440 Data sheet ( Hoja de datos )
| Número de pieza | HTRM440 | |
| Descripción | HITAG proximity reader module hardware | |
| Fabricantes | NXP Semiconductors | |
| Logotipo |  |
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INTEGRATED CIRCUITS
DATA SHEET
HTRM440 family
HITAG proximity reader module
hardware
Product specification
Supersedes data of 1999 Feb 01
File under Integrated Circuits, IC11
2001 Oct 04
1 page  
Philips Semiconductors
HITAG proximity reader module
hardware
interface
connector
power supply
connector
1
2
3
4
5
6
7
8
9
10
3 places
for tuning
capacitors
11
12
13
MGW271
Product specification
HTRM440 family
6.2 Antenna tuning connections
Three spare places for antenna tuning capacitors are
available on the PCB (see Fig.2).
6.3 Interface connector
INTERFACE TYPE
PIN
RS232
RS485
RS422
1 n.c. n.c. n.c.
2 RxD
A−
A−
3 TxD
A+
A+
4 n.c. n.c. n.c.
5 ground
ground
ground
6 n.c. n.c. n.c.
7 i.c. i.c. B+
8 i.c. i.c. B−
9 n.c. n.c. n.c.
handbook, halfpage
5
1
96
MGW310
Fig.3 D-sub interface connector.
6.4 Power supply connector
The inner pin of the DC supply connector (see Fig.4) has
to be connected to positive voltage and the outer one has
to be connected to ground. The connection is fail save.
handbook, halfpage
ground
Fig.2 Pin and connector assignment.
supply voltage
MGU480
Fig.4 DC power supply connector.
2001 Oct 04
5
5 Page 
Philips Semiconductors
HITAG proximity reader module
hardware
Product specification
HTRM440 family
10 APPLICATION INFORMATION
10.1 Metallic environment, interferences
The communication range is impaired by metallic
environment and electromagnetic interferences
(e.g. monitors and keyboards). Therefore, you should
keep a distance of at least the antenna’s diameter to
metallic surfaces or loops as well as to electromagnetic
interferences. If this is not possible, you have to take
preventive measures such as using ferrites or shielding for
transponder and antenna.
10.2 Distance between two antennas
In order to be able to operate two systems side by side
without negative influence on communication ranges, you
must place the antennas at a minimum distance of four
times the antenna diameter. If you place them at a closer
distance be sure to use suitable shielding or
synchronisation.
• Interference received by the antenna because of an
external noise source (e.g. monitor, keyboards); the
remedial measure is to remove the antenna from the
interfering area
• Connecting cables of the antenna changed by mistake
• Antenna is mounted in metal environment; the remedial
measure is to mount a non-metal space keeper between
the antenna and the metal
• Antenna is not designed following the design
instructions
• Inductance of the antenna is too high
• Quality factor of the antenna is too high (Q > 40)
• Antenna current is too high
• Antenna voltage is too high.
10.3 Possible sources of errors by connecting the
HTRM440
The following error list should be checked if any error
(e.g. read or write distances that do not reach the specified
values) occurs:
• Power supply cable not mounted correctly
• DC power supply voltage not in the specified range from
9 to 16 V
• Serial interface not connected correctly
11 SURVEY OF REFERENCED DOCUMENTS
CATEGORY
Data sheet
Application note
TITLE
“HTCM400, HTRM440 Family, HTRM800 Family Interface Protocol Reader - Host”
“HT1 (resp. HT2) Transponder family, reliability and integrity of data transmission”
2001 Oct 04
11
11 Page | ||
| Páginas | Total 16 Páginas | |
| PDF Descargar | [ Datasheet HTRM440.PDF ] | |
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