Measurement Computing USB-2020 - Manual (Page 14)

USB-2020 User's Guide Functional Details
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.
Signal mapping on the C40-37F-x cable
40-pin cable end 37-pin cable end
Pin Signal Name Pin Signal Name
1 GND 1 GND
2 +VO 20 +VO
3 GND 2 GND
4 N/C 21 N/C
5 DIO7 3 DIO7
6 N/C 22 N/C
7 DIO6 4 DIO6
8 N/C 23 N/C
9 DIO5 5 DIO5
10 TRIG IN 24 TRIG IN
11 DIO4 6 DIO4
12 GND 25 GND
13 DIO3 7 DIO3
14 GND 26 GND
15 DIO2 8 DIO2
16 GND 27 GND
17 DIO1 9 DIO1
18 GND 28 GND
19 DIO0 10 DIO0
20 GND 29 GND
21 GND 11 GND
22 N/C 30 N/C
23 N/C 12 N/C
24 N/C 31 N/C
25 GND 13 GND
26 N/C 32 N/C
27 N/C 14 N/C
28 N/C 33 N/C
29 GND 15 GND
30 N/C 34 N/C
31 N/C 16 N/C
32 N/C 35 N/C
33 GND 17 GND
34 N/C 36 N/C
35 +VO 18 +VO
36 N/C 37 N/C
37 GND 19 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).
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