Hardware Information
7-22
SIMATIC Rack PC 840 Manual
A5E00104826-03
Port for Floppy Disk Drive, X26
This port is intended for the connection of a standard floppy disk drive. The
maximum connection length of the data cable may not exceed 40 cm.
Pin No. Designation Description Input / Output
1 GND Ground -
2 DENSEL High Density Disk selection Output
3 GND Ground -
4 - Unassigned -
5 GND Ground -
6 DRAME0 Data rate signal Output
7 GND Ground -
8 INDEX_N Index hole recognition Input
9 GND Ground -
10 MOT_N0 Activate motor 0 Output
11 GND Ground -
12 DS_N1 Drive 1 selection
13 GND Ground -
14 DS_N0 Drive 0 selection
15 GND Ground -
16 MOT_N0 Activate motor 1 Output
17 GND Ground -
18 DIR_SL_N Step motor direction Output
19 GND Ground -
20 STEP_N Step motor pulse
21 GND Ground -
22 WR_DAT_N Write data signal Output
23 GND Ground -
24 WR_GAT_N Enable data signal Output
25 GND Ground -
26 TRACK_N0 Track 0 signal Input
27 GND Ground -
28 WR_PRT_N Write protection signal Input
29 GND Ground -
30 RD_DAT_N Read Data signal Input
31 GND Ground -
32 SIDE_1_N Page selection Output
33 MED_ID1 High Density Disk recognition Input
34 DCHG_N Disk change display Input
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