Essex Electronics K1 Series Installation Instructions Manual page 14

At this point the Keypad will appear non-functional and will not

accept any entries. (If the wrong key is pressed during the program-
ming sequence, pressing the * key will clear the entry. You will then
hear 2 rapid beeps and both LED's will flash at the same rate. The
Keypad will generate an error tone if you enter a SITE CODE over
255.)
Disconnect power to the RED wire and disconnect the PINK wire

from the BLACK wire.
Now you can connect the standard Wiegand 5 wires to the Keypad
and the programmed SITE CODE will be generated as part of the 26
Bit data when the enter key (#) is pressed.
This procedure may be repeated to change the SITE CODE.
The factory default site code is 000.
BLUE- CCTV
Pressing any position on the Keypad will generate a 30-second,
0.25 Amp, intermittent duty grounding output on the BLUE wire.
ORANGE- Buffered/Hold Line
When the Hold Line or ORANGE wire is pulled low, codes entered
on the Keypad are stored in the buffer. When the Hold Line is re-
leased to a logic high, the buffered code is sent. This input is pulled
high with a 2.2K resistor.
YELLOW- Audio Control
Pulling YELLOW low (grounding) causes the beeper to sound.
TAN- Case Ground
In higher static prone areas, the TAN wire is used to divert static
discharge away from the microprocessor in the Keypad. Ideally,
the TAN wire should be connected to a known Earth Ground at the
Keypad installation point (Do NOT run back to the panel through the
cable).
10 Essex Electronics, Inc. | 805.684.7601 | 800.KEY-LESS | fax 805.684.0232 | keyless.com