Conrad TowiTek User Manual

Technical Data

TowiTek Long Range RFID Reader

dimensions : 240 x 240 x 35 mm
connection cable: fixed, 6 pin, 2 m
supply voltage: 12-15V DC =
current consumption: less than 200mA
Interfaces: Wiegand 42 / RS-485 9600/8N1

allowed ambient temperature: 0°C .... 40°C

operating frequency: 125kHz
compatible RFID transponders: TowiTek transponder and

EM410x comp. 64/40Bit ROM

Disposal after end of using life for this product

Electronic devices of all kinds must not be disposed thru regular
household waste disposal but should be turned in to a collection

point for proper recycling. Please check with your local

requirements.

Limited Warranty

This product was designed and manufactured with great care and comes with a

warranty against material or manufacturing defects at time of purchase. This

warranty is valid for 24 months starting with the day of purchase and can be claimed

with original sales receipt. The warraty of TowiTek is limited to cost free repairing or
replacement of the defective unit. Expenses and risk of transportation; compensation
for installation and de-installation and all other expenses which may be related to the

repair or exchange of this product are not refunded by TowiTek. The liability for

consequential damages resulting from the use of this product – no matter of which

exact kind – is generally ruled out.

TowiTek

Long Range RFID

Reader

Nr. 19 15 27

User Manual

www.conrad.com

Thank you for purchasing this product of TowiTek!
This user guide contains many important instructions on
safe and proper use of this product. The purpose of this

user guide is to make sure you always will get best

performance andan reliable operation of your new product.

PLEASE FULLY READ THIS USER GUIDE!

The handling of products operating with electric current requires you to
follow the rules from VDE such as VDE 0100, VDE0550/0551, VDE 0700,
VDE 0711 and VDE 0860 or other local rules in your country.

•

TowiTek modules are not designed and authorized for use in life support
or life saving applications! Do not use the product for applications in
which a temporary or permanent failure or malfunction could cause
damage to persons or propery.

•

If the module is used to switch currents greater 24V it is necessary to
have the installation done with no voltage applied and performed by a
trained professional authorized for such work. The module may only be
used in such application if it was installed in a safe to touch enclosure.

•

The module must only be used in dry and clean environment. The use
near water, heavy dirt and/or high humidity is dangerous and not
permitted.

•

The product must not be used in conjunction with any type of flammable
liquid or gas or other environment with risk of spark triggered
explosions.

•

Never exceed the limits or ratings listed in the 'Technical Data' section at
the end of this user guide.

•

If the module is used in schools or educational facilities or similar
institutions the operation must be supervised by trained and authorized
staff.

•

The product itself and all parts thereof (including packing material) are

not suitable toys for childern! (choking hazard, risk of electric shock, ...)

Intended use for this product

The TowiTek Long Range RFID Reader operating on 125kHz is designed
to read the ID information from RFID tags and transmit this data to an
connected access control system.

The unit is equipped with two data interfaces

• Wiegand 42-Bit interface

• RS-485 serial interface operating with 9600bps / 8N1

connection wire assignment

The 6-wire interface cable uses this color coding for the signals:

red power supply +12-15V DC
black power supply 0V (Data - GND)

green Wiegand42 Interface 'WG0'
white Wiegand42 Interface 'WG1'

blue RS-485 Interface 'A'
yellow RS-485 Interface 'B'

Power supply requirements

The power supply voltage needs to be stabilized and there must be no
high frequency noise (ripple voltage) since this could significantly reduce
the obtained reading range.

Data format on the Wiegand 42 interface

On the Wiegand 42 interface a sequence of 42 pulses (bits) is transmitted
on the 'WG0' and 'WG1' lines

Both output signals are open collector type. The connected access control
terminal will pull up the lines to +5-12V level in quiet state.

For a complete ID-code transmission 42 negative pulses with a duration of
100µs each and delay of 2 mS between consecutive pulses are sent.
Depending a logic '0' or '1' the pulses are transmitted on the 'WG0' or
'WG1' line.

The ID-code of the transponder is 40Bit and two parity bits are added for
validation of the transmission. The transmission starts with an added
'even' parity bit for the first 20 data bits and ends with added 'odd' parity bit
calculated from the later 20 data bits.

E (b0 ................ b19 ) (b20 ................ b3 9) O

Example:

1 0101 1101 0001 1010 0010 0001 0100 0110 0011 110 0 1

The parity bits are calculated for the first 21 bits of the transmission
always having a even number of ones while the last 21 bits will always
have a odd number of ones.

Data format on the RS-485 interface

The data output on the RS-485 interface will start immediately after the
transmission on the Wiegand interface is completed.

The 40 bit of the ID-code are send as 5 consecutive bytes without any
additional packet framing, header or checksum added.

The transmission speed is 9600 bps (104µS per bit). The transmission
uses 8 data bits, one start bit and one stop bit (8N1).

Mounting instructions

The RFID reader can be mounted to an even surface using the 4 holes in
the corners.

The antenna must be installed on a non-metallic surface since metal
objects will degrade the reading performance of the Antenna significantly.

The manuals and documentation for our products is constantly improved
and translations to other foreign languages may become available.

Please make sure to check for the latest versions at www.conrad.com

FIND MORE PRODUCTS FROM

AVAILABLE AT

www.conrad.com

19 15 27 ENG - REV 1.00 / 12.08

EU-Declaration of conformity

The company

TowiTek HK Ltd.

ROOM 1613, 16/F.

TAI YAU BUILDING

181 JOHNSTON ROAD

WANCHAI, HONG KONG

declares in their own responsibility that the product

Long Range RFID Reader BN 19 15 27

complies to the standards

EN 55022 (EMV emission)

EN 61000-6-1 (EMV tolerance)

The above named company keeps records

with confirm the compliance to the standards

Liu Hong Quan Shenzhen 15-12-2008

(managing director)