National Instruments NI 6115 Switch User Manual


 
Chapter 4 Connecting Signals
© National Instruments Corporation 4-3 NI 6115/6120 User Manual
I/O Connector Signal Descriptions
Table 4-2. Signal Descriptions for I/O Connector Pins
Signal Name Reference Direction Description
ACH<0..3>GND Ground for Analog Input Channels 0 through 3—These
pins are the bias current return point for
pseudodifferential measurements.
ACH<0..3>+ ACH<0..3>GND Input Analog Input Channels 0 through 3 (+)—These pins
are routed to the (+) terminal of the respective channel
amplifier and carry the input signal.
ACH<0..3>– ACH<0..3>GND Input Analog Input Channels 0 through 3 (–)—These pins are
routed to the (–) terminal of the respective channel
amplifier and are the DC reference for the (+) input
signal of that channel.
DAC0OUT AOGND Output Analog Channel 0 Output—This pin supplies the
voltage output of AO channel 0.
DAC1OUT AOGND Output Analog Channel 1 Output—This pin supplies the
voltage output of AO channel 1.
AOGND Analog Output Ground—The AO voltages are
referenced to this node.
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<0..7> DGND Input
Output
Digital I/O Signals—DIO6 and 7 can control the
up/down signal of general-purpose counters 0 and 1,
respectively.
+5V DGND Output +5 VDC Source—These pins are fused for up to 1 A of
+5 V supply. The fuse is self-resetting.
SCANCLK DGND Output Scan Clock—This pin pulses once for each A/D
conversion when enabled. The low-to-high edge
indicates when the input signal can be removed from
the input or switched to another signal.
EXTSTROBE* DGND Output External Strobe—This output can be toggled under
software control to latch signals or trigger events on
external devices.