ZKTeco's C3 Plus series is an IP-based controller offering RFID cards and dynamic QR code authentication for access control solutions.
The C3 Plus series includes three models: C3-100 Plus, C3-200 Plus, and C3-400 Plus. This series is designed for small—to medium-sized enterprises and can handle up to 100,000 multi-tech card users and 100,000 dynamic QR code transactions. The C3 Plus series has RS-485 interfaces, which ZKTeco's RS-485 protocols and OSDP (Ver 2.1.7) for accessing card readers. It is also compatible with ZKTeco's QR code reader, including QR50, QR500, and QR600. C3 Plus series is highly versatile, with the Wiegand interface (Wiegand format: W26/W34/W66) for
seamless integration with third-party access control readers. The C3 Plus Series levels up data storage encryption by AES 256-bit algorithm. Also, C3 Plus Series adopts the AES 128-bit algorithm encryption to ensure the communication between controller, readers and I/O expansion boards secure. Also, the C3 Plus Series support HTTPS / TLS1.2 protects communications between the server and the web client.

Features:
•Access points capacity: 1 / 2 / 4 Access Points.
•Multiple Authentication Methods: RFID Cards / Dynamic QR Code / Password.
•Optimal Capacity for small to medium enterprise. Supports 100,000 QR Code capacity and 100,000 RFID card capacity.
•Features ZKTeco's RS-485 protocols and OSDP (Ver 2.1.7) for connecting card readers, and it is compatible with ZKTeco's QR code readers such as QR50, QR500, and QR600.
•Highly versatile with Wiegand interfaces (Input) for integrating with third party card reader equipped with Wiegand interface (Wiegand format W24/W34/W66).
•Supports the I / O expansion board, EX0808 with 8 inputs and 8 outputs (via RS-485 connection).
•Supports firmware protocol access control push and compatible with ZKBio CVAccess.