Velleman HAA2866 - Manual (Page 30)

THE WIRE HARNESS FOR “WIEGAND DATA OUTPUT” & “APO DATA I/O”
NOTE: The information in this section is NOT for the system in Stand Alone operation. It is not
necessary to plug in the wire harness to the socket, just leave it open.
The information below is for setting the keypad unit with the Wiegand data interface to a control panel,
or the APO Data I/O interface to an APO Controller to make up a high security split-decoded system.
Split-decoded Keypad System
Most of the general purpose keypads on the market are self-contained systems for stand alone
operation. It controls the appliance(s) directly with its output relay contact(s); such as the electric lock
in an access control system. The electric lock is connected to the keypad that is installed outside the
house. The thief can open the door without a code or card but just open the keypad box and make
contact to the output relay terminal. It is a safety drawback in security.
The high security systems are usually operating in the Split-decoded mode that combines an outside
unit for card reading and code entry; and a control panel or a decoder unit installing in a secure closet
inside the house. The outside unit and the inside unit communicate in digital data with each other. All
the commands are in digital codes, the thief can do nothing to the inside unit even the outside unit is
opened in sabotage. This design philosophy confirms high security to the area protected, but not just
relying on the protection of the keypad with the outer box and two screws.
The Wire Harness
The keypad unit comes with two sets of interface wires from the wire harness. The Wires 1-4 are the
Wiegand interface wires. The Wire 6 is the Data Input/Output wire for the connection with the optional
APO’s Digital Keypad Access Controller, DA-2800 for high security Split-decoded operation. The Wire
5 is the Common Grounding point of these signal wires.Please see the location of the wire Harness
on Page 7.
The Wires for "Wiegand & Data" :
1) Yellow ---------
2) Blue -----------
3) Brown ---------
4) Red ------------
5) Black ----------
6) White ----------
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D1, Wiegand DATA 1
D0, Wiegand DATA 0
BUZ, Buzzer control line, 0V active, for Wiegand audible status indication
LED, Red LED control line, 0V active, for Wiegand visible status indication
GND, (-) Common Ground
DATA, APO’s data In/Out line, for APO’s decoder connection