Scintillator-based Beam Loss Monitors will be used at SwissFEL for monitoring the losses for optimising beam conditioning, beam measurements with the wire-scanner and Undulator protection. The optical signals from the scintillators will be detected by PMTs which are located outside the accelerator tunnel. The PMT control and signal conditioning is done via a front-end based on the PSI Analogue Carrier board. The PAC board allows for amplification/attenuation, offsetting and single-ended to differential conversion, while the Generic PSI Carrier (GPAC) board provides digitisation and FPGA-based post-processing, along with bridging the communication to EPICs controls. A fast algorithm was developed to process the signals and trigger the machine protection system (MPS) at 100Hz. The system integration of the BLMs and its results will be discussed in this paper.