Suprema DM-20 Door Control Module for Centralized Access Control

The Suprema DM-20 is a secure, intelligent door control module designed to extend centralized access control capabilities to up to four doors. Ideal for enterprise and commercial security systems, the DM-20 provides encrypted communication, advanced input/output functionality, and seamless integration with Suprema’s BioStar 2 platform. With support for third-party Wiegand readers, tamper detection, and legacy RS-485 wiring, the DM-20 is a flexible, scalable solution for securing multi-door installations.

Product Features

Centralized Door Control Manages up to four doors from a single module, reducing the need for multiple control units while maintaining centralized administration and secure access. Encrypted Communication All data between the DM-20 and Suprema master terminals is transmitted via secure, encrypted protocols, ensuring system integrity and protection against unauthorized access. Compatibility with Third-Party Readers Equipped with two Wiegand interfaces, the DM-20 supports integration with third-party RFID or biometric readers, allowing greater flexibility in hardware selection. Advanced Input and Output Support Provides four supervised inputs (with tamper detection), four TTL inputs, six TTL outputs, and four relays, enabling comprehensive door, sensor, and alarm control. BioStar 2 Software Integration Built specifically for use with Suprema’s BioStar 2 platform, DM-20 allows full-featured centralized access control and real-time monitoring of all connected doors and readers. RS-485 Communication & Legacy Wiring Supports RS-485 (OSDP) communication and is designed to work with existing wiring infrastructure, minimizing installation costs in facilities with older cabling systems. Expandable System Architecture A single Suprema master terminal can manage up to 31 DM-20 modules, each controlling up to 2 Wiegand readers, enabling deployment in large-scale systems of up to 62 doors with third-party readers. DIN Rail Mounting Engineered for professional installations, the module supports DIN rail mounting, ensuring secure and efficient deployment in structured environments such as control panels.

Product Specifications

• Model: DM-20
• Reader Compatibility:
  • 2 x Wiegand ports (3rd-party reader support)
  • RS-485 (OSDP)
• Door Control:
  • Controls up to 4 doors
  • 4 relays (door locks or output devices)
• Inputs:
  • 4 x TTL inputs
  • 4 x Supervised inputs (tamper-detection supported)
• Outputs:
  • 6 x TTL outputs (e.g., for LED and buzzer control)
• Communication Protocol: RS-485 (encrypted)
• Compatibility: Suprema BioStar 2 only
• Mounting Method: DIN rail
• Use with Suprema Devices: Required (must be connected to a Suprema master terminal)
• Maximum Expansion: 31 DM-20 modules per Suprema master device
• Operating Temperature: Typically -20°C to +50°C (confirm with official datasheet)
• Dimensions: 190 mm (H) x 90 mm (W) x 21 mm (D)
• Weight: 300 g
• Certifications: CE, FCC, KC, RoHS, REACH, WEEE