ZKTeco · C3-400
The C3-400 Plus is an IP controller for four access points, providing user identification via RFID cards, QR codes, or passwords. It supports connection of up to eight readers via the RS-485 (OSDP) communication interface or four Wiegand readers (W24/W34/W66). It has a built-in memory for 100,000 users (cards), 100,000 QR codes and 500,000 events. The C3 Plus series features an RS-485 interface, OSDP (Ver. 2.1.7) support, and compatibility with ZKTeco QR50, QR500, and QR600 series QR code readers. The controller also features a Wiegand interface (Wiegand format: W26/W34/W66), enabling seamless integration with third-party access control readers. The C3 Plus series devices use the AES 128-bit encryption algorithm to ensure secure communication between the controller, readers, and I/O expansion boards, and support the HTTPS/TLS1.2 protocol to protect data exchange between the server and the web client. The C3-400 Plus supports the connection of the EX0808 8-input, 8-output I/O expansion board (via RS-485 connection) and has a built-in PUSH access control protocol for compatibility with