Instruction manual

7
Essex Electronics, Inc. | 805.684.7601 | 800.KEY-LESS | fax [phone] | keyless.com
26 Bit Wiegand Keypad Reader
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! 26 Bit Wiegand Specifications
The All-In-One 12-Pad is capable of generating standard 26 Bit
Wiegand data. DATA 1 and DATA 0 signals are open collector
outputs with 2.2K pull-ups to the internal +5v. The data is sent at
1 msec per bit with a pulse duration of 50 usec. An annunciator
beeps with each key press. When the LED control input is pulled
low, the GREEN LED will be on and the RED LED will be off.
When the input goes high the RED LED is on and the GREEN
LED is off. The LED that is illuminated will blink off with every key
press. The LED control input is pulled to the internal +5v with a
2.2K resistor. An output is generated with each key press, which
can be used to drive a CCTV or Security Light. Located through
the Blue wire (see Connector Wiring), this is an open collector
output capable of sinking 1/4 A with a 30 second on time.
The following WIEGAND output is sent each time the # (enter) key
is pressed:
P S S S S S S S S N N N N N N N N N N N N N N N N P
BIT 1 2 9 10 25 26
! BIT 1 is an even parity for the following 12 bits.
! The sum of bits 1-13 is even.
! BITS 2-9 are the SITE CODE.
! BITS 10-25 This is the number(PIN) entered prior to pressing #
(enter).
! Leading 0’s are added as required. Bit 10 is most significant.
! BIT 26 is an odd parity over the previous 12 bits. The sum of bits 14-
26 is odd.