Multi-way Interlocks for High-Security Facility

Interlock systems control the locking of two or more doors so that if one door is in use or insecure, the remaining doors refuse access. Interlocks are sometimes referred to as ‘Air Locks’ or ‘Man Traps’ and provide a high level of security.

Each door is electrically locked and monitored. The S1000 control logic monitors the state of each door for closed and secure states, thus preventing the release of the lock device. Once activated only one door can be accessed at any given time.

Doors can have full access control using Card Reader Devices, Biometric Devices, Pin-Pads or can simply be released using REX/RTE Switches. Interlock doors can also be remotely controlled from the ARCOSoftware interface which is Touch Screen Compatible. The ARCOInterface can graphically display the Interlock status on the Site Map and can be remotely commanded to enforce or override the interlock, for emergency override procedures. Updating the User Credentials can also be remotely managed from ARCO.

Common installations of interlock systems include clean rooms, bank lobbies, cash handling facilities, laboratories and jewelry stores.
The simplest interlock Access Control System may have two doors and standard systems can be configured to manage up to sixteen (16) doors. Individual Interlocked Doors may be controlled by an online or standalone S1000 Smart Controller. The S1000 supports interlocking capabilities as standard, meaning you can mix interlock groups with access controller doors on the same system.

SPG Controls suggested system configuration.

  • Ethernet /Wi-Fi/4G/3G/2G.
  • User Access Rule-set Automation.
  • Full Battery Backup.
  • Physical Attack Detection Vibration / Explosion etc.
  • Temperature / Humidity / Light Monitoring.
  • Hazardous Gas Detection.
  • Full Access Control including Dual Card Control.
  • CCTV Monitoring.


  • Multi-Door interlock to a maximum of 16 Doors per S1000 Controller can be configured.
  • Up to 8 Interlocks per S1000 Controller.

Configuring the interlock is as simple as selecting the group of doors that are to be interlocked from the drop-down menu:

Contact us at and tell us how we can help you secure your Security System.

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