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ZKAccess systems are built on flexible, open technology to provide management, real-time monitoring, and control of your access control system- all from a web browser. Simply download one instance of our free Windows-based v5.3 software (on a customer's computer or ZKAccess InBridge appliance) and then manage the software from any computer's web-browser which has administrative rights.

C3-400's versatile design features take care of present and future needs with ease and efficiency. It is one of the most rugged and reliable door controllers on the market, with a multitude of built-in features.

Be sure to inquire about ZKAccess options which can further reduce your C3 installation time and labor, including:

1) Power over Ethernet (12V 2A)
2) InBridge Server (Single-purpose management appliance with pre-loaded software)
3) Wireless Bridge (up to 300-foot range)


  • Over-current protection, over-voltage protection, and reversal protection for the power supply and all of the input and output terminals
  • Reliable network system of controllers using either TCP/IP or RS-485 Serial communication
  • Supports different Wiegand formats, and connects to ZK readers as well as HID, Mifare, and generic ID card readers
  • Connects with a variety of electric locks, sensors, exit buttons, alarm devices, and indicators.
  • Can be integrated with other security systems such as CCTV, Intrusion Detection, Fire Alarm Release, and elevastor Control for total security system. Directly compatible with ZK’s biometric reader controllers.
  • Easy-to-use and intuitive programming with ZKAccess Software
  • System management by browser from client PC’s. No need to install software on each client
  • Programming of special logic between doors is set up with simple pull down menus. No special scripts or code is required.
  • Management software allows indication of real-time door status and remote commanding of door open/close state. Alarm conditions such as forced open and extended open alarms are reported
  • Advanced access control capabilities are built into the hardware, including anti-passback, Dual and multi-Card Authentication, and Duress Mode.



Users 30,000
Event Buffer 100,000 transactions



Reader Port

Qty. 4 26/34bit Wiegand
Qty. 4 8bit burst for PIN

Output Port

Qty. 2 1 Aux FORM-C relay output-SPDT 2A@30V AC
Qty. 2 1 FORM-C relay output-SPDT 5A@36V DC or 8A@30V AC


Indicator communication, power, status and prox card


Operating Temperature 32-113 F (0-45 C)
Operating Humidity 20% to 80%


Dimensions 10" x 6" x 2 1/2"
Weight 3 lbs (48 ozs.)


32bit MIPS CPU


Communication RS485
Communication TCP/IP

Input Port

Qty. 12 Exit Button 1, 2, 3, 4
Qty. 12 Door Sensor 1, 2, 3, 4
Qty. 12 Aux 1, 2, 3, 4

Baud Rate

RS485 9600-28400 baud


Power Supply 9.6V-14.4V DC, 1A


Width 8.5" (215.9 mm)
Height 5" (127 mm)

Wiring Diagram

C3-400 ACCESS CONTROL PANEL - Wiring Diagram

C3-400 ACCESS CONTROL PANEL - Wiring Diagram 2


Certification C3-400 CE Certificate Download
Certification C3-400 FCC Certificate Download
Data Sheet C3 Series Datasheet Download
Installation Guide C3 Series Installation Guide Download
Quick Start Guide C3-400 Quick Start Guide Download