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模擬輸出接地模擬輸出電壓參考此節(jié)點(diǎn)。DACOUT AOGND輸出模擬輸出通道0至7—這些引腳提供相應(yīng)通道的電壓輸出。DGND--數(shù)字接地該引腳為輸入/輸出連接器處的數(shù)字信號以及+5 VDC電源提供參考。DIO DGND輸入或輸出數(shù)字輸入/輸出信號—DIO6和7可分別控制通用計數(shù)器0和1的上/下信號+5 V DGND輸出+5 VDC電源這些引腳為高達(dá)1 A的+5 V電源熔斷。保險絲自動復(fù)位。EXTREF AOGND Input External Reference這是模擬輸出電路的外部參考輸入。外部選通*DGND輸出外部選通此輸出用于控制SCXI設(shè)備。PFI0 DGND輸入PFI0作為輸入，這是可編程功能輸入（PFI）之一。PFI信號將在本章后面的定時連接部分進(jìn)行說明。PF<0不能輸出。PFI1 DGND輸入PFI1作為輸入，這是PFI之一。PFI1不能是輸出。PFI2 DGND輸入PFI2作為輸入，這是PFI之一。PFI2不能是輸出。PFI3/GPCTR1\U源DGND輸入輸出PFI3/計數(shù)器1源作為輸入，這是PFI之一。作為輸出，這是GPCTR1\U源信號。該信號反映連接到通用計數(shù)器1的實(shí)際源。PFI4/GPCTR1\U門DGND輸入輸出PFI4/計數(shù)器1門作為輸入，這是PFI之一。作為輸出，這是GPCTR1\U門信號。該信號反映連接到通用計數(shù)器1的實(shí)際門信號。GPCTR1\U OUT DGND輸出計數(shù)器1輸出此輸出來自通用計數(shù)器1輸出。

AOGND — — Analog Output Ground—The analog output voltages are referenced to this node. DACOUT AOGND Output Analog Output Channels 0 through 7—These pins supply the voltage output of the respective channel. DGND — — Digital Ground—This pin supplies the reference for the digital signals at the I/O connector as well as the +5 VDC supply. DIO DGND Input or Output Digital I/O signals—DIO6 and 7 can control the up/down signal of general-purpose counters 0 and 1, respectively. +5 V DGND Output +5 VDC Source—These pins are fused for up to 1 A of +5 V supply. The fuse is self-resetting. EXTREF AOGND Input External Reference—This is the external reference input for the analog output circuitry. EXTSTROBE* DGND Output External Strobe—This output is used for controlling SCXI devices. PFI0 DGND Input PFI0—As an input, this is one of the Programmable Function Inputs (PFIs). PFI signals are explained in the Timing Connections section later in this chapter. PF<0 cannot be output. PFI1 DGND Input PFI1—As an input, this is one of the PFIs. PFI1 cannot be an output. PFI2 DGND Input PFI2—As an input, this is one of the PFIs. PFI2 cannot be an output. PFI3/GPCTR1_SOURCE DGND Input Output PFI3/Counter 1 Source—As an input, this is one of the PFIs. As an output, this is the GPCTR1_SOURCE signal. This signal reflects the actual source connected to the general-purpose counter 1. PFI4/GPCTR1_GATE DGND Input Output PFI4/Counter 1 Gate—As an input, this is one of the PFIs. As an output, this is the GPCTR1_GATE signal. This signal reflects the actual gate signal connected to the general-purpose counter 1. GPCTR1_OUT DGND Output Counter 1 Output—This output is from the general-purpose counter 1 output.