Industrial and Commercial Applications for the eSSL C3-200 Controller

The eSSL C3-200 two-door access controller (KT internal SKU: KTI010050012DAC) delivers centralized access control and physical security automation across commercial, educational, and industrial facilities. Powered by a 32-bit 400 MHz CPU, 32 MB RAM, and 128 MB non-volatile flash memory, the controller independently regulates 2 doors while retaining up to 30,000 cardholders and 100,000 offline event transaction logs. Its multi-protocol architecture, onboard auxiliary I/O, and Form-C relays support diverse architectural deployment scenarios.

Bidirectional Commercial and Industrial Perimeter Access

In standard commercial and manufacturing environments, managing primary employee and visitor access points requires reliable credential validation and fast throughput. The C3-200 accommodates up to 8 readers—supporting either 4 RS-485 readers or 4 standard 26-bit Wiegand readers—enabling bidirectional card validation (entry and exit) across two independent doors.

Its 2 dedicated Form-C lock relays provide Normally Open (NO) and Normally Closed (NC) dry contacts, driving fail-safe devices such as magnetic locks or fail-secure hardware such as drop bolts and electric strikes. Direct integration with 2 request-to-exit push buttons and 2 door status magnetic contacts allows the controller to oversee door cycle timing and unauthorized forced-entry detection locally.

Cleanroom, Laboratory, and Cash-Handling Mantrap Interlocking

High-security and contamination-controlled environments—such as pharmaceutical cleanrooms, analytical laboratories, and cash-handling transfer airlocks—require door interlocking (mantrap) logic to prevent cross-contamination or breach. The C3-200 supports native hardware-level door interlocking without requiring external logic boards.

By continuously monitoring door position reed switches through its 2 door status inputs, the controller automatically locks the secondary door whenever the primary door is opened. Only after the active door has fully shut and its sensor circuit closes can the second door receive an access grant, maintaining environmental differential pressures and secure perimeter isolation.

High-Security Credential Verification with Anti-Passback Control

Facilities requiring strict perimeter accounting—such as data server rooms, distribution warehouses, and restricted technical zones—benefit from the C3-200 controller's hardware-level anti-passback functionality. When readers are installed at both entry and exit positions of a doorway, the controller enforces sequential read rules, preventing a cardholder from passing their credential back to an unauthorized individual.

Because the 32-bit processor executes anti-passback verification directly onboard within its 30,000 cardholder database, access decisions occur instantly without network latency. In the event of a network disruption over its TCP/IP or RS-485 interfaces, the non-volatile memory logs all attempts and continues enforcing access parameters offline.

Fire Safety and Alarm Linkage Automation

The C3-200 is engineered with 6 total onboard inputs and 4 total Form-C relay outputs, allocating 2 auxiliary inputs and 2 auxiliary relay outputs for system integration. Facilities can link external safety systems directly into the access controller:

• Emergency Break-Glass and Fire Alarm Integration: Auxiliary inputs terminate triggers from smoke detectors or building fire panels, automatically signaling the Form-C lock relays to release fail-safe doors for life-safety egress.
• Intrusion Alarm and Annunciator Control: The 2 auxiliary Form-C relays can trigger external sirens, flashing strobes, or signals to third-party automation controllers upon detecting forced doors or sensor tampering.

Application Scenario Matrix