The IC3600AFRB1 is a GE FANUC Field Taper Auxiliary Card from GE for the Mark I or Mark II systems. These series were developed by General Electric for the management of gas and steam turbines as the first two Speedtronic systems. Both systems are designed to control, sequence, protect, and monitor the turbine and its auxiliaries. This includes performing start-up procedures and fuel sequencing with independent protective backups for issues like vibration, flame, and over speed. It allows for multiple starts and stops under normal and fast conditions, including emergency stops. The IC3600AFRB1 has four relays located in its surface. These are labeled K1 through K4. The board has one right-angled PCB mating connector, which is marked 218A4637-P2. Opposite this connector, the board has twenty-five individual right-angled metal pins attached to its surface. These pins are designed to connect the board to wiring within the frame or chassis of the Mark I or Mark II system. The board is numbered from two to fifty by tens in this edge. The IC3600AFRB1 has eight jumper switches. It has four transistors. The board is built with two integrated circuits. Both circuits in the board are marked LM339N. These are quad differential comparators with low supply-current and low input offset voltage. The IC3600AFRB1 is built with metal film resistors and capacitors made of varying material, including polyester vinyl and aluminum electrolytic. The aluminum electrolytic capacitors in the board are marked 25v 100 ‘F.