Dortronics’ 4800 Series Door Interlock Controller accommodates up to five doors, including doors with automatic openers. It features adjustable timers for propped door time, panic release unlock time and unlock pause time for REX unlock time. Additional features include 12 inputs for door status, request for access, interlock override and emergency unlock. The unit’s 17 outputs control door locks (fail-safe or fail-secure), traffic lights and mirror door status with alarm outputs. It includes a watchdog circuit to monitor operation, LED input/output status indication and voltage spike/surge protection. The 4800 Series is available as a controller board only or with a 4-amp, Class 2 UL 294 power supply.

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