Suitable for air locks or security mantraps, with up to four normally unlocked doors or three normally locked doors, the PLC is factory programmed and tested to permit only one door, in any defined area, to be unsecured at a time. A request for access at any normally locked door will inhibit the REX inputs for all other locked doors and secure all unlocked doors in the area. Simultaneous requests for access or requests for access while another door is unsecured are denied to maintain the highest level of control. The controller may also be customised to control automatic door openers and provide timing and logic sequences for biological wash-down controls.

Any access control system can be used with the 4700 Series controllers. The request for access input recognises any normally open dry contact. With integral 12/24 VDC power supply, the PLC is powered from the built-in 4 amp power supply which also provides 12 or 24 VDC to operate maglocks and/or strikes for each of the doors. Its heavy-duty power supply is
ready for hook-up to a fire alarm system and an alarm output is also supplied for easy monitoring of the control system.

“We remain committed to offering the most cost effective access control solutions at Dortronics,” said Bryan Sanderford, National Sales Manager, Dortronics Systems, Inc. “Our core lineup of products, as well as our 4700 Series PLC Mantraps, ensure that customers do not have to compromise on quality while staying within their particular budget.”