Safety Precautions - CAMDEN CV-940-20 Series Installation Instructions Manual

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
XXXXXXXX
P1
Example: 170
1 1 0 1 0 1 0 1 0
Note: Parity bits are calculated as follows:
P1 = even parity calculated over the bits 2 to 13 (X)
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

11. Safety Precautions

• Do not install the device in a place subject to direct
sun light without protective cover
• Do not install the device and cabling close to a source
of strong electro-magnetic fields like radio-transmitting
antenna
• Do not place the device near or above heating
equipments
+ 16 bits user code = 2 bytes
XXXXYYYY YYYYYYYY
31527
0 1 1 1 1 0 1 1 0 0 1 0 0 1 1 1
P2 = odd parity calculated over the bits 14 to 25 (Y)
• If cleaning, do not spray or splash water or other
cleaning liquids but wipe it out with smooth cloth
or towel
• Do not let children touch the device without supervision
Note: that if the sensor is cleaned by detergent, benzene
or thinner, the surface will be damaged and the fingerprint
can't be entered.
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CV-940-20 Series
+ Parity bit (bit 26)
P2
0