Dortronics continues to enhance its portfolio of smart door interlock and mantrap solutions with their highly versatile and economical 4800 Series Intelligent Interlock Controllers and 4900 Series PLC Mantrap Controllers, which are both prominently featured in the company?s new exhibit at GSX 2018. The 4800 Series Door Interlock Controller accommodates up to five doors, including doors with automatic openers. The unit features adjustable timers for propped door time, panic release unlock time, and unlock pause time for REX unlock time.