DT20 Elevator/Multi-Door Access Control Unit can be restricted based on various user credentials, including RFID card,password or biometric.Normal management of the Access Control are "One for One", that means one card reader control one door. Valid card can open the door, invalid card can not open. Bur we can found that in many fields, a "One for More Controllers" are needed.The multi-door access control Pre-defined time schedules can also be used to control Elevator access. During normal visits/business hours, unrestricted floor access can also be permitted (aka Passage mode).
The DT20 and DT20K Elevator Controller can restrict access up to 20 floors. Each DT20 can support up to two DT20K boards. When combining together,total 40 floors can be controlled with two DT20K bundle.

DT20K Extend Function Board:
One DT20 Multi-Door Access Controller Support Max 2pcs DT20K Extensive Function Board

DT20K Extend Function Board Must work with DT20 One for more access controller together

PCB board size: 219mm * 115mm

Output Format: 20 Relay output
Voltage: 12VDC(Commend to use NU-05 or NU-05B access control power supply)