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Products
– Micro RWD QT (Quad Tag) |
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Low-cost
proximity RFID reader module supporting several transponder/tag
types.
Philips Hitag 1, Hitag S, Hitag 2, EM4102 and Microchip MCRF200/123
tag types.
The module is completely housed within a 24-pin DIP package
(pin compatible with
other modules) and only requires a 5v supply and a 700 micro-Henry
antenna coil to
be a fully featured read/write and tag acceptance system.
The
RWD module has outstanding RF drive capability and has a
read/write range to ISO
card size tags of up to 20cm whilst maintaining reliable
communication and high
resilience to EMC corruption. This has been achieved through
the RWD continuously
self-tuning to allow for inductive changes in the RF field
and extensive software/hardware
filtering.
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The
RWD module has a TTL level RS232 interface that allows a host
system to send and
receive easy-to-use optimised commands/data (for example:
Ascii “R” command to read
tag data and Ascii “W” command to write tag data).
The
RWD also has internal EEPROM memory for holding system parameters,
encryption/password keys, lists of authorised serial numbers
and supports direct LED
drives to give visual indication of acceptance. Up to 100ma
of drive current is also provided
as an output that can be used to switch external loads.
Individual
tag modes of RWD QT module operate in same manner as RWD
H1/S, RWD H2
and RWD EM4102 modules.
Download
Micro RWD QT data sheet
Download Micro RWD H1/S data
sheet
Download Micro RWD H2 data sheet
Download Micro RWD EM4102 data
sheet
We can
customise RWD interface and features for your application,
contact us
for
more information
Basic
electrical specification without LEDs fitted and no auxiliary
output drive.
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Parameter |
Typical
Value |
| Supply
Voltage |
5v
DC |
| Operating
temperature |
-25
deg C to + 70 deg C |
| Average
current consumption with default polling cycle delay |
20ma |
| Peak
antenna voltage (tuned with optimum Rant = 31.5) |
110v |
| Peak
current (Antenna tuned with Rant = 31.5, Ra = 22 R)
(NOTE
RF IS NORMALLY OFF AND IS ONLY TURNED ON DURING TAG
COMMUNICATION RESULTING IN VERY SHORT BURST OF UP
TO 200MA CURRENT CONSUMPTION)
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200ma
max |
| Communication
time for reading 40 bit serial number |
20ms |
| Communication
time for 32 bit WRITE operation |
30ms |
| Maximum
data rate (between Tag and RWD) |
4k
bits/sec |
| Range
(dependent on antenna dimensions) |
Up
to 20cm |
| Output
relay drive |
Up
to 100ma sink |
| Switch
input (pulled up) |
Active
low |
| Serial
Interface |
TTL
level RS232 |
| Communication
Parameters |
9600
baud, 8 data bits, no parity, 1 stop bit protocol
with CTS handshake |
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