Screw Terminal, PCB, Strain-Relief, PXI Multifunction I/O Module Terminal Block—The TB-2706 is a terminal block assembly that includes a printed circuit board (PCB), 70 screw terminals, and a metal enclosure with a strain relief. You can directly connect the TB-2706 to the front panel I/O connectors of compatible Multifunction I/O devices with a 68-pin VHDCI connector. The TB-2706 helps you connect analog input, analog output, counter-timer, and digital I/O signals to supported NI hardware.