Instruction manual

Essex Electronics, Inc. | 805.684.7601 | 800.KEY-LESS | fax [phone] | keyless.com
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4 Bit Word Keypad Reader
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! 4 Bit Word Specifications
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. 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.
Each key press generates an 4-Bit sequence in the following
output format:
KEY OUTPUT KEY OUTPUT
0 0000 6 0110
1 0001 7 0111
2 0010 8 1000
3 0011 9 1001
4 0100 * 1010
5 0101 # 1011