The Large Hadron Collider (LHC) at the European Organisation for Nuclear Research (CERN) is one of the largest particles accelerators in the world. Due to the complexity when colliding these particles at high energy and the high cost of failure (in both financially and efficiency aspects), a Machine Protection System (MPS) is requiered, monitoring (CERN) high energy accelerators and protecting all parts of the accelerator when there is beam presence. This backbone of the MPS relies on a Beam Interlock System (BIS). The BIS transmits the request from any equipment system in the MPS to either a Beam Dumping System (BDS) (to eject safely the particles from the accelerator) or inhibits the injection of the beam to the accelerator. Thus, the communications between BIS elements are declared as safety critical communications. The purpose of this thesis is to explore different communication protocols that could be used to send and receive data between the systems that compose the BIS. The current method used is Manchester modulation, which encodes data achieving a zero overall DC bias. Besides its simplicity, as this method incorporates clock-matching between the trans- mitter and receiver devices within the data stream itself, the bit rate is essentially halved, limiting the protocol itself. This thesis compares and contrasts the current approach with Hamming codification. Results show that the data can be encoded with a similar resources efficiency without the necessity of clock matching at the receiver, as well as a zero overall DC bias. The conclusion guides then to an improvement of transmission length and reliability confidence between these elements
