Phoenix Contact manufactures industrial automation, interconnection, and interface solutions. Founded in 1923 in Essen, Germany, Phoenix Contact developed the first modular terminal block. Phoenix Contact offers products including: terminal blocks, relays, connectors, signal conditioners, power supplies, controllers and programmable logic controllers (PLCs), input/output (I/O) systems, industrial ethernet, controller system cabling, printed circuit board (PCB) terminal blocks and connectors, and surge suppression.