The 59-851-03 is 4 commercial concord sub assembly PCB from Interlogix that is designed to promote the support of electrical and mechanical connections of electronic components by the use of a range of different methods. The 59-851-03 PCB is designed with a quality construction that can easily provide high operation and use in a variety of setups. The 59-851-03 PCB can be installed with ease, and can provide additional money saving.