Products – Micro RWD QT (Quad Tag)
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 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.
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 QT
readme file
Download Micro
RWD H1/S
data sheet
Download Micro
RWD H2
data sheet
Download Micro
RWD
EM4102 data sheet
Data sheets,
Application notes and Windows applications. (as supplied on CDROM)
Basic electrical specification without LEDs fitted and no auxiliary output
drive.
| 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) |
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 |