Filter
Top Products
Signal Connections Chapter 3
SC-2040 User Manual 3-4 © National Instruments Corporation
Signal Connection Description
Table 3-2. Input Connectors Signal Summary
Connector Signal Name Description
J5 AIGND Analog Input Ground—These inputs provide a bias current return point
for AC-coupled signals.
J1, J2, J3, J4,
J6, J7, J8, J9
CH+<0..7> Positive Inputs—These inputs are the positive signal inputs for
channels 0 through 7.
J1, J2, J3, J4,
J6, J7, J8, J9
CH-<0..7> Negative Inputs—These inputs are the negative signal inputs for
channels 0 through 7.
J10, J13 DGND Digital Ground—These inputs provide the reference for all digital signals
and the reference for the +5 V power source.
J10 TRIG Trigger—This input, which is connected directly to the PFI2 pin on
connectors J11 and J12, is a trigger input for the MIO-16E. A low-to-
high transition on TRIG alerts the MIO-16E to place the SC-2040 into
hold mode and start acquiring data.
J13 +5 V +5 VDC Source—When external power is selected, this input provides
DC power for the SC-2040 from an external +5 V. The SC-2040 fuses
the input to 1 A of the +5 V supply.
Table 3-3. Output Connectors (J11 and J12) Signal Summary
J11 Pin
(50-pin)
J12 Pin
(68-pin)
Signal Name Description
1, 2, 4, 6, 8,
10, 12, 14, 16,
18
23, 24, 26, 27,
29, 31, 32, 34,
56, 58, 59, 61,
63, 64, 66, 67
AIGND Analog Input Ground—These pins establish the
reference point for the SC-2040 outputs (ACH<0..7>).
They are also connected directly to the AIGND input
connector J5 for use with AC-coupled signals.
3, 5, 7, 9, 11,
13, 15, 17
68, 33, 65, 30,
28, 60, 25, 57
ACH<0..7> Analog Channels 0 through 7—These pins carry the
outputs of the SC-2040 eight channels to the DAQ
board. They are referenced to AIGND.
24, 33 4, 7, 9, 12, 13,
15, 18, 35, 36,
39, 44, 50, 53
DGND Digital Ground—These pins are the reference for the
+5 V power source and for the digital signals used by
the SC-2040: TRIG (PFI2) and TRACK*/HOLD
(PFI7/STARTSCAN).
34, 35 8, 14 +5 V +5 VDC Source—When internal power is selected,
these pins provide DC power for the SC-2040 from
the MIO-16E board. The MIO-16E pins are fused to
1 A of +5 V supply.
40 43 TRIG (PFI2) Trigger—This pin, which is connected directly to the
TRIG input on screw terminal connector J10, is a
trigger input to the MIO-16E PFI2 line. A low-to-
high transition on PFI2 alerts the MIO-16E to place
the SC-2040 into hold mode and start acquiring data.
(continues)