FKCOW & FKCOR Printed-Circuit Board Connectors Phoenix Contact FKCOW and FKCOR Printed-Circuit Board Connectors are right-angle, spring-contact connectors featuring push-in spring connections that allow for quick and easy operation and can be color-coded to reduce wiring errors. Integrated test points increase installation and maintenance convenience. When combined with DIN rail-mounted devices, wire positioning on Phoenix Contact FKCOW and FKCOR Printed-Circuit Board Connectors can be made from above or below the device.