National Instruments SC-2043-SG Benutzerhandbuch
Chapter 3
Signal Connections
© National Instruments Corporation
3-5
SC-2043-SG User Manual
Table 3-2. Pin Assignments for the Lab/1200 I/O Connector (Continued)
Pin Numbers
Lab/1200 Connector
Signal Names
38
EXTTRIG
39
EXTUPDATE*
40
EXTCONV*
41
OUTB0
42
GATB0
43
OUTB1
44
GATB1
45
CLKB1
46
OUTB2
47
GATB2
48
CLKB2
49
+5 V†
50
DGND†
†
These signals are not routed to screw terminals. All other signals on the I/O connectors are routed directly to
screw terminals (J1–J6) for convenient signal termination.
screw terminals (J1–J6) for convenient signal termination.
Table 3-3. MIO (J10) I/O Connectors Signal Summary
Signal Name
Pin Number
Description
AIGND
2
Analog Input Ground—This pin provides the AC noise current return
point for the analog circuitry and for the onboard excitation supply. It is
also routed to a screw terminal.
point for the analog circuitry and for the onboard excitation supply. It is
also routed to a screw terminal.
AISENSE
19
Analog Input Sense—This pin is the reference node for the conditioned
strain gauge bridge signals. It is also routed to a screw terminal to
provide a reference for analog inputs on channels ACH<8..15>.
AISENSE is directly connected to the excitation supply return and is
earth-grounded. This makes AISENSE a low impedance reference;
therefore, all signals referenced to it
strain gauge bridge signals. It is also routed to a screw terminal to
provide a reference for analog inputs on channels ACH<8..15>.
AISENSE is directly connected to the excitation supply return and is
earth-grounded. This makes AISENSE a low impedance reference;
therefore, all signals referenced to it
MUST
be floating.
ACH<0..7>
3, 5, 7, 9, 11,
13, 15, 17
13, 15, 17
Analog Input Channels 0 through 7—These pins carry the conditioned
strain gauge bridge signals (referenced to AISENSE) to the DAQ board.
They are not routed to screw terminals.
strain gauge bridge signals (referenced to AISENSE) to the DAQ board.
They are not routed to screw terminals.
DGND
24
33
Digital Ground—This pin is the reference for the +5 VDC power supply.
It is also routed to a screw terminal to provide a reference for the digital
signals at the screw terminals.
It is also routed to a screw terminal to provide a reference for the digital
signals at the screw terminals.
This pin establishes the DC return path for the onboard excitation supply.
It is not routed to a screw terminal.
It is not routed to a screw terminal.
+5 V
34
+5 VDC Source—This pin provides DC power for the SC-2043-SG from
the MIO or MIO E Series board. It is not routed to a screw terminal.
the MIO or MIO E Series board. It is not routed to a screw terminal.
Others
Others
The remaining pins are routed directly to screw terminals to provide easy
access to the additional analog, digital, and counter/timer I/O signals of
the DAQ board. Refer to the Signal Connections chapter in your DAQ
board user manual for pin descriptions.
access to the additional analog, digital, and counter/timer I/O signals of
the DAQ board. Refer to the Signal Connections chapter in your DAQ
board user manual for pin descriptions.