Detailed descriptions 
  16.1 Motherboard 
SIMATIC Box PC 627 
Operating Instructions, Release 05/2006, A5E00362052-03 
16-15 
Connection for optical drive, X3 
 
Pin No.  Abbreviation  Meaning  Input /Output 
1  Reserved  Reserved  - 
2  Reserved  Reserved  - 
3  Reserved  Reserved  - 
4  GND  Ground  - 
5  Reset  Reset signal  Input /Output 
6  D8  Data signal D8  Input /Output 
7  D7  Data signal D7  Input /Output 
8  D9  Data signal D9  Input /Output 
9  D6  Data signal D6  Input /Output 
10  D10  Data signal D10  Input /Output 
11  D5  Data signal D5  Input /Output 
12  D11  Data signal D11  Input /Output 
13  D4  Data signal D4  Input /Output 
14  D12  Data signal D12  Input /Output 
15  D3  Data signal D3  Input /Output 
16  D13  Data signal D13  Input /Output 
17  D2  Data signal D2  Input /Output 
18  D14  Data signal D14  Input /Output 
19  D1  Data signal D1  Input /Output 
20  D15  Data signal D15  Input /Output 
21  D0  Data signal D0  Input /Output 
22  DREQ  DMA request  Input 
23  GND  Ground  - 
24  IOR_N  Read signal  Output 
25  IOW_N  Write signal  Output 
26  GND  Ground  - 
27  IORDY  Ready signal  Input 
28  DACK_N  DMA acknowledgment  Output 
29  IRQ15  Interrupt signal  Input 
30  AD_1  Address1  Output 
31  AD_0  Address 0  Output 
32  AD_2  Address 2  Output 
33  CS_N  Chip select signal  Output 
34  HDACT_N  Activity  Input 
35  CS1_N  Chip select 1  - 
36  CSEL  Chip select signal  - 
37  GND  Ground  - 
38  P5V  +5 V voltage supply  Output 
39  P5V  +5 V voltage supply  Output 
40  P5V  +5 V voltage supply  Output 
41  P5V  +5 V voltage supply  Output