Signal Connections; Analog Input - Measurement Computing USB-2020 User Manual

USB-2020 User's Guide
40-pin to 37-pin signal mapping
Signal mapping on the C40-37F-x cable is not a one-to-one ratio. The following table lists the pin numbers of
the signals on the 40-pin end and the pin numbers of the associated signals on the 37-pin end.
Pin Signal Name
1 GND
2 +VO
3 GND
4 N/C
5 DIO7
6 N/C
7 DIO6
8 N/C
9 DIO5
10 TRIG IN
11 DIO4
12 GND
13 DIO3
14 GND
15 DIO2
16 GND
17 DIO1
18 GND
19 DIO0
20 GND
21 GND
22 N/C
23 N/C
24 N/C
25 GND
26 N/C
27 N/C
28 N/C
29 GND
30 N/C
31 N/C
32 N/C
33 GND
34 N/C
35 +VO
36 N/C
37 GND
38 N/C
39 N/C
40 N/C

Signal connections

Analog input

The USB-2020 has two single-ended simultaneous sampling analog inputs that provide sampling at rates of up
to 20 MS/s to internal memory when using BURSTIO and at rates of up to 8 MS/s (system-dependent) to the
host computer in continuous scan mode. The input ranges are software-selectable for ±10 V, ±5 V, ±2 V, ±1 V.
When using BURSTIO, the internal memory can store up to 64 megasamples at the maximum rate for transfer
to the computer after the acquisition is complete. Data is transferred to the host computer at a maximum rate of
8 MS/s (system-dependent).
Signal mapping on the C40-37F-x cable
40-pin cable end 37-pin cable end
Pin Signal Name
1 GND
20 +VO
2 GND
21 N/C
3 DIO7
22 N/C
4 DIO6
23 N/C
5 DIO5
24 TRIG IN
6 DIO4
25 GND
7 DIO3
26 GND
8 DIO2
27 GND
9 DIO1
28 GND
10 DIO0
29 GND
11 GND
30 N/C
12 N/C
31 N/C
13 GND
32 N/C
14 N/C
33 N/C
15 GND
34 N/C
16 N/C
35 N/C
17 GND
36 N/C
18 +VO
37 N/C
19 GND
14
Functional Details