Measurement Computing USB-202-OEM - Manual (Page 10)

USB-202-OEM User's Guide Functional Details
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Board components
Board components are shown in Figure 2. Note that each screw terminal location is unpopulated.
1 Screw terminal J1 5 Screw terminal J8 9 Activity LED
2 Screw terminal J2 6 Header connector W3 10 Status LED
3 Header connector W1 7 Screw terminal J7 11 USB connector
4 Screw terminal J3 8 Screw terminal J6 12 Pull-up/down jumper W4
Figure 2. Board components
Connector W1
Header connector W1 provides connections for the DIO, external clock I/O, trigger, counter, power output, and
digital ground reference.
W1 pinout
Pin Signal name Pin description Pin Signal name Pin description
1 DIO0 DIO channel 0 2 DIO1 DIO channel 1
3 DIO2 DIO channel 2 4 DIO3 DIO channel 3
5 DIO4 DIO channel 4 6 DIO5 DIO channel 5
7 DIO6 DIO channel 6 8 DIO7 DIO channel 7
9 GND Digital ground 10 +VO User voltage output
11 GND Digital ground 12 AICKO External clock pacer output
13 AICKI External clock pacer input 14 CTR Counter input
15 TRIG Digital trigger input 16 GND Digital ground
Figure 3. Connector W1 pinout