Probeable, Front Accessibility Compact FieldPoint Connector Block—The cFP-CB-4, ideal for prototyping and troubleshooting, is a probeable 20-pin connector block with front accessibility. The removable screw-terminal connector allows easy front-panel access to the terminals for wiring and probing. If your application is subject to hazardous voltage and/or high vibration, NI recommends affixing ferrules to the ends of all signal wires.