Article Updated: June 05, 2025
Firmware applied for: v1.0.0
Available BioStar 2: v2.9.9 or above
Available BioStar 2 Device SDK: v2.9.9 or above
Available Suprema G-SDK: v1.8.0 or above
The Suprema Door Interface (DI-24) supports up to four readers and two doors, providing seamless access control even in offline scenarios, thereby eliminating access restrictions. When paired with Suprema's CoreStation series, it enables streamlined, scalable door control solutions, simplifying your operations while ensuring flexibility and adaptability for your environment.
[Door Interface (DI-24), a new 2-door interface module]
Why Door Interface (DI-24)?
The Suprema Door Interface (DI-24) module offers a scalable and secure access control solution, supporting up to four readers and two doors. Offline failover operation capability ensures uninterrupted access control even in the event of network failure. Easy to install and integrate, it simplifies the expansion of access systems while enhancing security. When paired with Suprema's CoreStation series, it provides centralized, efficient management for seamless, large-scale deployment. This combination of flexibility, reliability, and robust security makes DI an ideal choice for modern access control needs.
Key Features
| Type | Features | Release Status |
| Max. Text Log | 400 | Released |
| RS-485 | 3 ch (OSDP v2 complaint) | Released |
| Wiegand | 2 ch | Released |
| Input/Supervised Input | 6 ch
| Released |
| Output | 6 ch | Released |
| AUX Input | 3 ch
| Released |
For more detailed specification, please visit Door Interface A&E Specifications.
Supported Model List
DI-24
- DI-24 requires BioStar 2 version 2.9.9 or above for full compatibility.
- Suprema RS-485 Master devices that support DI-24:
- CS-20/CS-20P (Relevant Article: [BioStar 2] New Product Introduction - CoreStation 20)
What is New About Door Interface?
1. RFID Door Interface Module
- Compatible device list: X-Station 2 (non-fingerprint model only), XPass 2, XPass D2
2. Connect maximum 4 RFID readers via RS-485 at RS-485 Port 0 and RS-485 Port 1
- You can connect a maximum of 2 RS-485 Slave devices (RFID readers) per RS-485 port. (There can be a total of 4 RS-485 Slave devices per 1 DI-24 device.)
- However, you CANNOT use the "RS-485 port" without the port number on the top for the RS-485 Slave RFID reader connection.
- NOTE that you CANNOT connect RS-485 Slave devices and Wiegand readers at the same time.
3. OSDP V2.2 Support
- DI-24 can use secure communication with advanced encryption.
4. Offline Access Control
- Even though the connection between the DI-24 and its RS-485 Master device, such as CS-20 or CS-20P, DI-24 can open the doors by itself.
- DI-24 stores a maximum of 16 facility codes for continuous operation.
- NOTE that this feature can operate with the cards that contain facility codes. If your cards do not contain facility codes, such as MIFARE CSN, this feature will not work.
5. Intelligent Input Mapping
- The AUX Input on the top of DI-24 is pre-configured for Tamper, AC power fail, and fire inputs from the Fire Alarm Panel.
6. Support Power Out from DI-24
- You can power out to 2 readers and 2 door locks.
- Recommended to use EM locks or Strike locks.
FAQ
Q1> How many readers can be connected with Door Interface (DI-24)?
- Please find the answer in the linked article below.
- Relevant Article: [BioStar 2] Understanding Maximum Reader and Door Capacity with CS-20/CS-20P and DI-24