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 ................ b39) O
Example:
1 0101 1101 0001 1010 0010 0001 0100 0110 0011 1100 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)
