Instructions

59
38. APPLICATION EXAMPLES
a) BASIC WIRINGS OF A SPLIT-DECODED ACCESS CONTROL DOOR LOCK
Description
Split-decoded keypad provides overall higher security than the stand alone keypad. It consists of a server keypad
unit installing outside for human interface and a decoder unit installing inside the house for all the input / output wire
installations. The two units are linking up with the Data I/O bus. The server keypad manages the data while the
decoder operates the door lock or appliance according to the commands from the server keypad. This approach
prevents the door lock or the controlled appliance be operated due to sabotage at the external keypad.
System Connection
DATA I/O BUS
(+) POWER SUPPLY
(–) COMMON GND
Any DK-2800 MK-II Keypad
THE SERVER KEYPAD
DA-2800 OR DA-2801
(DECODER)
ELECTRIC LOCK