Advantech USB-4751/4751L - Manual (Page 19)

13 Chapter 3
Figure 3.2: Opto-22 CN1/CN2
Opto-22 CN1 Opto-22 CN2 (USB-4751 Only)
1 PC07 2 GND 1 PC17 2 GND
3 PC06 4 GND 3 PC16 4 GND
5 PC05 6 GND 5 PC15 6 GND
7 PC04 8 GND 7 PC14 8 GND
9 PC03 10 GND 9 PC13 10 GND
11 PC02 12 GND 11 PC12 12 GND
13 PC01 14 GND 13 PC11 14 GND
15 PC00 16 GND 15 PC10 16 GND
17 PB07 18 GND 17 PB17 18 GND
19 PB06 20 GND 19 PB16 20 GND
21 PB05 22 GND 21 PB15 22 GND
23 PB04 24 GND 23 PB14 24 GND
25 PB03 26 GND 25 PB13 26 GND
27 PB02 28 GND 27 PB12 28 GND
29 PB01 30 GND 29 PB11 30 GND
31 PB00 32 GND 31 PB10 32 GND
33 PA07 34 GND 33 PA17 34 GND
35 PA06 36 GND 35 PA16 36 GND
37 PA05 38 GND 37 PA15 38 GND
39 PA04 40 GND 39 PA14 40 GND
41 PA03 42 GND 41 PA13 42 GND
43 PA02 44 GND 43 PA12 44 GND
45 PA01 46 GND 45 PA11 46 GND
47 PA00 48 GND 47 PA10 48 GND
49 +5V_OUT 50 GND 49 +5V_OUT 50 GND