IL2S interlock has the possibility to manage the doors of MAL, Pass box and Pass-through airlocks. This series of interlocks includes a controller, special two-color signal light, shaft lock, adapter and connection sockets. IL2S interlocks are more economical and less costly than ILx series and are only configured as Normally Open and are suitable for installation in post boxes. This type of interlock does not need conventional buttons and uses a special two-color signal light for the interlock to announce the status of the interlock.