This is a new
breed of smart reader with superb performance.
No matter what type of tag,
FDX/HDX, glass or normal tags, it works
to get the best possible performance from all
tags at all times. It features very long read range and is intended for
logistics and cattle tagging.
Read ranges in the order of 110 thru 140 cm are possible with our
600x800mm Antenna.
The
series readers are dual readers that read HDX B (AMPSK, ISO11784) and FDX
(BI-Phase ISO11785) tag simultaneously. The series readers employ DSP
techniques that dramatically reduce
interference, noise and vibration effects making the reader suitable for
hostile noisy environments. Excellent read range can be achieved with both
glass and conventional open coil format tags partly because the reader can
instantly change its internal algorithms to adjust to differences in individual
tag parameters. It has a synchronization feature that allows multiple readers
to be used in close proximity.
The series readers are equipped with a
sophisticated auto-tune facility that compensates for Antenna drift
due temperature changes. The readers
perform an auto-tune shortly after power up. (allows the host computer to
command an auto tune at any time down the RS232. See the command schedule)
Power requirements
11.4volt to 13.7volt Regulated DC
@ 0.5 – 1.5 Amp.
Interface
RS232 @ 9600-19200-38400 baud : N,8,1
Read Range with 600x800mm antenna
Up to 110-140 cm (2piece
antennas can reach 200cm)
Frequency
134.2KHz
Transponder
ISO Transponder
Auto-tune
Internal upon switch on and remote via
RS232.
Tags
FDX/HDX 128bit ISO11784/5 Tags
Output Format
Decimal or Hexadecimal
Antenna Safety Interlock
Stops RF Power if Antenna Socket
Unplugged
Antenna Impedance
8-15uH
Synchronization
Up to 6 readers
Tenth Cycle Synchronization
20mS, 50mS
Case
Painted Die-cast Aluminum.
Sockets
Water Resistant
Weight
1.7kg (nominal)
Size
40mmx220mmx125mm
Minimum HDX Period
2.5mS with no HDX tag in Range
Minimum Read Time FDX
50mS. (Range 88cm)
Maximum allowed FDX search
100mS
The switch-on report gives three groups
of information.These are software version, the software date and the tuning variable. The software
version and the software date are for reference only. The Tuning Variable shows
the current state of the antenna tuning in hexadecimal. For users who are using
the Antenna both the tune value digits have meaning. All values except
00, 01, 02, 3D, 3E, 3F are acceptable. If the tune value is not acceptable
it will indicate that the antenna is too close to a metal obstruction or other
condition.
The
performs a self auto-tune when it is switched on,and after this it only performs an auto-tune if it is commanded to do so. The user
can command an auto-tune at any time by sending (02) CMD1 (03). It is advisable
to command the reader to perform an auto-tune every hour or so, so that the
reader can compensate for any small changes in the antenna tuning. This has
been left to the user because an auto-tune cycle takes about 100ms during which
no tags will be read. In some critical high speed applications the user may
determine when an auto-tune cycle ‘dead time’ will have the least affect. The
reader will send a report in the following format: - Tune Value = 08, where 08
is the tuning variable.
DSP techniques provide the reader with
good noise rejection but it makes sense not to use up the benefit this provides
by placing the antenna in a bad position. Some simple rules should be followed
when the antenna is installed. Avoid power cables as these can be a source of
electrical noise, especially in industrial situations. Do not place the antenna
in close proximity to metal structures particularly sheet metal. Small metal
fittings are not a
problem and will not affect performance.
Some energy saving lights and switching power supplies can generate lot of interference. Do not place the
antenna near known sources of electronic noise. If you have any doubt, ask your
supplier.
The
normal spacing of a 600mmx800mm antenna between multiple readers is 2.5meters
if the Antennas are facing each other. In general the antenna spacing can be 4x
the maximum dimension of the antenna for negligible loss of performance.
Spacing less than the recommended may tried. The absolute minimum limit to the
distance between antennas is 1.5x the maximum antenna dimension, if the
antennas are facing each other. If the Antennas are not facing each other then
they may be placed closely in one of the ‘Null’ pick-up positions. In ‘null’
positions, antennas may be sited very close to each other.
The
series readers have an electronic interlock to turn off the radio frequency
power when the antenna plug
is removed. In this condition the read LED
will flash repeatedly until the antenna socket is plugged in. Never operate the
reader without an antenna connected. A ‘Warning RF Socket Bad Connection’
message will also be sent over the RS232 connection. These safety features
alone must not be relied upon to protect the reader against abuse or Antenna
malfunction. Always use a correctly specified antenna.
The
series readers sense the RF output voltage upon switch on. This is partly to warn the user
against changing to an unsuitable antenna. If the RF voltage is unexpectedly
high a ‘Warning High RF Voltage’ message will be sent over the RS232
connection. If an incorrect impedance antenna is being used the reader may be
not able to detect an over voltage condition and could lead to component stress
and failure
If
multiple readers are to be used in close proximity they must be synchronized or
there may be loss of read range,
particularly with HDX tags. FDX range can
be affected to a less extent. The readers must adjust the radio frequency power
so that the readers can work together. The incorporates a special
synchronization line that allows the readers to ‘talk’ to each other to get the
best results. No user knowledge is required and once the cables are connected
the readers adjust in milliseconds and stay adjusted.
In multiple reader configurations all the
sync lines must connected to ensure performance. All the sync cables are
connected in parallel. The beeper logic outputs (yellow wire on power cable)
may also be parallel wired to give a single logic output. This may
significantly ease the wiring of large systems
The
Antenna has a nominal inductance of 8-15uH and has a search coil 820mmx620mm.
If the user wishes to use their own antenna the inductance should be in this
range.
The
RS232 communication Interface has a software selectable baud rate of either
9600, 19200 or 38400 baud with no parity, 8data bits and 1 stop bit
(xxxxx:N,8,1). The cable provided is 3m long. The interface itself will work
reliably up to 100meters using a good quality cable. See command interface for
commands. For long distance communication the 9600 baud is generally best.
There may be occasions where the Antenna
is required to be placed remote from the reader. The antenna cable supplied is
3 m long. The cable can be extended with varying degrees of power loss to the
Antenna. However,
power loss of power to the Antenna does not
directly mean a corresponding loss in range, for example a 50%
power loss in the cable will cause a loss of
range of about 15%. In general use a high quality screened cable for lengthy
extensions. The cable should be chosen to have a series inductance <15uH.
The
Reader Module and cables should be stored at a temperature between 0 to
+35deg C. We recommend a plastic sealed bag with a silicon desiccant to keep
the moisture low. Storage at high temperatures may reduce the life of the
product.
Features
Absolute
Maximum/Minimum Ratings
The reader has a simple RS232 command
user interface. The command interface is entered with an STX (start of
transmission) which is a binary $02 and ‘CMD’ as an ASCII string. For test
purposes, these commands can be sent using a terminal. Once the command
interface has been entered interface the commands can be sent. The commands can
be easily typed in from a terminal keyboard.
Auto
Tuning
Service Tel:
Phone:+86 010 81710227
Fax: +86 010 60780369
Mobile: +86 15901057128
Email: sales@hongchangtag.com
