Intelligent, fully integrated, and user-configurable PLC interlock Controllers

March 24, 2022
Fully integrated mantraps allow on-site configuration without complex software

Las Vegas, NV (March 23, 2022)Dortronics Systems Inc., an industry leader in off-the-shelf and customized door control solutions, is showcasing their intelligent, fully integrated, and user-configurable PLC interlock Controllers at ISC West 2022 (booth #2036). Dortronics PLC Interlock Controllers, otherwise known as mantraps, provide systems designers and installers with highly cost-effective and versatile door control solutions for a wide range of commercial and industrial applications.

“Our 48900 and 48500 Series Interlock Controllers are part of a strong portfolio of intelligent mantrap solutions that combine the latest features and high performance with extreme versatility and cost-efficiency,” said Bryan Sanderford, National Sales Manager, Dortronics Systems, Inc. "Dortronics interlock controllers are designed for ease of installation and implementation and integrate well with industry-leading third-party access control systems."

The 48900 Series Interlock Controller is a cost-effective solution for implementing door interlock and mantrap systems with up to nine doors. The fully integrated, single-board solution provides installers with complete programming control of all operating and configuration options without the need and expense of complex software. The 48900 Series Interlock Controllerintegrates with virtually any access control system utilizing dry contacts. Each door terminal has a form-C SPDT dry contact output to mirror door status back to an access control panel or remote console. The feature-packed unit also provides outputs for traffic lights, door violation alarms, and provides three individual timing sequences for propped door time, emergency override unlock, and request-to-exit unlock time.

For added installation versatility, the 48900 Series PLC interlock Controller can be paired with a 4-, 6-, or 10-Amp UL 294 power supply that includes a Fire Alarm connection for emergency egress and can provide power to operate maglocks, electric strikes, and traffic lights. The controller is also available without the power supply and enclosure for connection to an existing 12-24VDC power source.

Dortronics will also be showcasing the 48500 Series Door Interlock Controller at ISC West 2022 which accommodates up to five doors, including doors with automatic openers. The unit is easily configured and features adjustable timers for propped door time, panic release unlock time, and REX unlock time. Additional features include twelve inputs for door status, request for access, interlock override, and emergency unlock.

 The 48500 Series Door Interlock Controller’s 22 outputs control door locks (fail-safe or fail-secure), traffic lights, and mirror door status with alarm outputs. Additional features include 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 power supply.

All Dortronics Door Interlock Controllers are proudly manufactured in the U.S.A.

For more information on Dortronics visit or e-mail [email protected].  

About Dortronics Systems, Inc.

Dortronics Systems, Inc. is a U.S. based manufacturer of standard and customized access control products and locking hardware devices. Our comprehensive suite of products include electric strikes, maglocks, panic bars, key switches, pushbutton controls, delayed egress systems, door prop alarms, and mantrap interlock controllers that can be supplied with alarm annunciators and security consoles. Products are available in a variety of colors and finishes from stock with most products available for shipment the next day. Custom colors, finishes and features are also available upon specification with fast turn-around. Visit us at

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