Hardware, Reader, and Network Interface Compatibility

The eSSL C3-200 two-door access controller (KT SKU: KTI010050012DAC) is engineered for broad integration across enterprise security environments, access control peripherals, and local area network infrastructures. Designed to regulate two doors independently, the controller provides standardized communication buses, dry contact relay outputs, and supervised digital inputs to connect with legacy and modern field devices.

Access Reader Interface Compatibility

The C3-200 supports up to 8 readers across two distinct field wiring architectures. Installers can interface up to four 26-bit Wiegand readers (with other Wiegand bit formats supported upon request) using dedicated onboard DATA0, DATA1, GND, and +12V terminations, or deploy up to four RS-485 slave card readers over a multi-drop serial bus.

This dual-interface reader architecture provides native compatibility with an extensive range of credential scanning peripherals, including:

• Standard 26-bit Wiegand RFID proximity and smart card readers
• Wiegand-compatible numeric PIN keypads
• Wiegand or RS-485 optical barcode and QR code scanners
• Proprietary RS-485 serial slave readers for long-distance multi-drop runs

Electric Locking Hardware Integration

Lock control is executed via two onboard Form-C electromechanical relays, complemented by two auxiliary Form-C relays. Each relay offers dry contacts with isolated Normally Open (NO), Normally Closed (NC), and Common (COM) terminals. This layout facilitates direct electrical interfacing with both primary categories of electronic locking hardware:

• Fail-Safe Devices: Direct integration via COM and NC terminals for continuous power-to-lock devices such as electromagnetic locks (maglocks) and fail-safe shear locks.
• Fail-Secure Devices: Direct connection via COM and NO terminals for power-to-unlock mechanisms including electric strikes, motor-driven drop bolts, and electromechanical mortise locks.

The two dedicated auxiliary Form-C relays integrate seamlessly with external automation controllers, sirens, visual strobes, or building management panels for programmable event-triggered outputs.

Sensor, Switch, and Auxiliary Input Compatibility

The controller integrates six onboard hardware inputs configured for dry contact field signaling. These include two dedicated exit device inputs, two door status sensor inputs, and two auxiliary inputs. Compatible peripheral devices include:

• Standard momentary Normally Open (NO) push-to-exit buttons and touch sensors
• Magnetic reed switches and door position sensors (DPS) for door open/closed monitoring
• Normally Open or Normally Closed auxiliary triggers, such as smoke detectors, intrusion alarm sensors, and perimeter beam detectors

These onboard inputs enable native hardware-level interlocking (mantrap/airlock functionality between two doors) and anti-passback rule enforcement without requiring external logic modules.

Host Network Protocols and Management System Integration

For administrative deployment and data synchronization, the C3-200 interfaces with local infrastructure using standard IEEE 802.3 TCP/IP Ethernet networking, EIA/TIA RS-485 multi-drop serial communication, and optional Wi-Fi. The controller communicates over standard IP networks directly with eSSL access control server software and desktop management applications.

Powered by a 32-bit 400 MHz CPU, 32 MB of RAM, and 128 MB of onboard flash memory, the controller independently retains access policies for up to 30,000 cardholders and logs up to 100,000 offline event transactions, ensuring uninterrupted authentication if communication with the host server drops.

System Compatibility and Interface Specifications