Siemens SIMATIC PANEL PC 877 Operating Instructions Manual page 213

Interface to floppy disk drive, X26
This interface is designed for connecting a standard floppy drive. The maximum length of the
data cable should not exceed 40 cm.
Pin No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
SIMATIC Panel PC 877
Operating instructions, Release 07/2006, A5E00877780-01
Abbreviation
GND
DENSEL
GND
-
GND
DRAME0
GND
INDEX_N
GND
MOT_N0
GND
DS_N1
GND
DS_N0
GND
MOT_N0
GND
DIR_SL_N
GND
STEP_N
GND
WR_DAT_N
GND
WR_GAT_N
GND
TRACK_N0
GND
WR_PRT_N
GND
RD_DAT_N
GND
SIDE_1_N
MED_ID1
DCHG_N
Meaning
Ground
High density disk selection
Ground
Not assigned
Ground
Data rate signal
Ground
Index hole recognition
Ground
Activate motor 0
Ground
Drive 1 selection
Ground
Drive 0 selection
Ground
Activate motor 1
Ground
Step motor direction
Ground
Step motor pulse
Ground
Write data signal
Ground
Enable data signal
Ground
Track 0 signal
Ground
Write protection signal
Ground
Read data signal
Ground
Page selection
High density disk recognition Input
Disk change display
Detailed descriptions
17.1 Motherboard
Input/Output
-
Output
-
-
-
Output
-
Input
-
Output
-
-
-
-
-
Output
-
Output
-
-
-
Output
-
Output
-
Input
-
Input
-
Input
-
Output
Input
17-21