I/O Connector Signal Descriptions - National Instruments NI 6115/6120 User Manual

I/O Connector Signal Descriptions

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