Secure Multi Door I/O Module

DM-20 provides secure door control of up to four doors via encrypted communication and also contains two wiegand reader interfaces for use with 3rd party readers. A wide variety of I/O interfaces allows DM-20 to be a part of diverse system configurations.

Centralized Access Control

Combined with a Suprema Device, DM-20 provides ability to design and implement a centralized access control system with up to 32 doors and up to 8 biometric devices through daisy chain configuration. Learn more on different configuration via
Application Note >

Key Highlights

  • Secure data transmission due to encrypted communication
  • Control up to four doors through multiple inputs and outputs
  • Easily monitor device status with 4 additional supervised input
  • Provides ability to implement Centralized Access Control with a Suprema device
Centralized Access control
Interface Communications RS485
Input TTL Input x 4
Supervised Input x 4
Output TTL Output x 6
Hardware Relay Form C x 4
Wiegand In/Out x 2
Reader Power Output 750ma (12V) x 2
Power 12V
Operating Temperature -20° to 60°C
Dimensions 120 x 70 x 36 mm
(W x H x D)
Compatible Devices

BioStation 2

BioLite Net

BioEntry W

BioEntry Plus




Xpass S2

Secure I/O 2

BioStation A2

BioStation L2

BioEntry W2



FaceStation 2