National Instruments BNC-2120 Installation Manual

Also see for BNC-2120: Installation guide

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National Instruments BNC-2120 Installation Manual Manual pdf 11 page image

© National Instruments Corporation 11 BNC-2120 Installation GuideFigure 6. Connecting PFI 8 to USER 1 BNCThe designated space next to each USER <1..2> BNC is for marking or labeling signal names.Connecting Digital I/O SignalsConnect to the digital I/O signals of your DAQ device to the digital I/O screw terminals, P0.<0..7>, onthe BNC-2120. You can individually configure each signal as an input or output. D GND is available atthe screw terminals to supply the reference for the DIO signals. When connecting signals to the screwterminals, use 28–16 AWG wire with the insulation stripped to 0.28 in.Note P0.6 and P0.7 can control the up/down signal of general-purpose counters 0 and 1,respectively. Refer to the Using the Quadrature Encoder section for more information aboutusing the P0.6 and P0.7 terminals with the quadrature encoder.The LEDs next to each screw terminal indicate the state of each digital line, as listed in Table 3.SpecificationsThis section lists the specifications of the BNC-2120. These specifications are typical at 25 °C unlessotherwise specified.Note Refer to your DAQ device documentation for specifications about analog input, analog output,trigger/counter, and digital and timing I/O signals.Table 3. Digital I/O LEDsDigital I/O LED Digital Port StateLit The port is either pulled high or driven highNot lit The port is either pulled low or driven lowBNC CablePFI 8SignalTIMING I/OScrew Terminal BlockPFI 8/P2.0PFI 9/P2.1PFI 12/P2.4PFI 13/P2.5PFI 14/P2.6+5 VD GNDWireUSER 1 BNCD GND USER 1InternalConnection