The Modular Control System is a push button, hardwire system which has controlled airfields both RAF and Naval, in the UK and at overseas bases. Previously the Modular Control System has also been in use at some civil airports, but the majority of these have now been converted to SmartControl.
During the lifespan of the Modular Control System, also known as MCS, it has undergone many changes, and atg airports, working in conjunction with the Defence Infrastructure Organisation have been responsible to liaise with individual air stations and ensure that the various systems have been upgraded to the latest MkIV standard.
One feature of this standardisation includes for the control of constant current regulators (CCR) to power taxiway circuits whereas previously this was achieved by the use of a ‘D22 contactor unit’ and a Transformer Mains Supply Electronic (TMSE).