4
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For more information please refer to BioManager User Manual
21
3. MOUNTING
If the biometric reader is installed and used outdoor, the reader MUST be fitted with the MCD-MINI
polycarbonate cover available in our accessories in order to protect the sensor from direct rainfall. The
operating temperature of the product is between -15ºC - + 50ºC. If the reader is installed in an environment
where the temperature can drop below -10ºC or/and if the sensor could only be exposed to direct sunlight, it is
strongly recommended to install the reader inside a third party sealed wall mount box (fitted with additional
heater if very low temperature) to keep a constant sensor level performance. XPR™ cannot guarantee the
functionality of the product if measures and advice before are not followed.
It is also strongly recommended to use double technology biometric readers when use outdoor to offer first
higher security but also the possibility to use different readers depending on users.
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10. WIEGAND PROTOCOL DESCRIPTION
The data is sent over the lines DATA 0 for the logic “0” and DATA 1 for the logic “1”. Both lines use inverted logic,
meaning that a pulse low on DATA 0 indicates a “0” and a pulse low on DATA 1 indicates a “1”. When the lines
are high, no data is being sent. Only 1 of the 2 lines ( DATA 0 / DATA 1 ) can pulse at the same time.
Example: data 0010....
D0
D1
5V
0V
100 us
1 ms
0
0
1
0
5V
0V
Data bit 0 = approximately 100 us (microseconds)
Data bit 1 = approximately 100 us (microseconds)
Time between two data bits: approximately 1 ms (millisecond). Both data lines (D0 and D1) are high.
Description for the 26 bits Wiegand format
Each data block consists of a first parity bit P1, a fixed 8 bits header, 16 bits of user code and a 2nd parity bit P2. Such a data block is shown
bellow:
Parity bit (bit 1) + 8 bits header +
16 bits user code = 2 bytes + Parity bit (bit 26)
P1
P2
XXXXXXXX
XXXX
YYYY YYYYYYYY
Example:
170
31527
1
0
1 0 1 0 1 0 1 0 0 1 1 1
1 0 1 1 0 0 1 0 0 1 1 1
Note:
Parity bits are calculated as follows:
P1 = even parity calculated over the bits 2 to 13 ( )
X
P2 = odd parity calculated over the bits 14 to 25 ( )
Y
E A A A A A A A A B B B B B B B B B B B B B B B B O
Even
Parity
Bit
Odd
Parity
Bit
Site Code
User Code
100 mm
94 mm
30 mm
Cable
Ø6.0
3
0
m
m
ATPD-MINI
