M7-400 Expansions
12-24 S7-400, M7-400 Programmable Controllers Module Specifications
A5E00069467-07
Table 12-7 MSM 478 Parallel Port, Socket X1 (25-Pin Sub D Socket)
Pin Meaning Direction
1 /STROBE Input/output
2Data 0 Input/output
3Data 1 Input/output
4Data 2 Input/output
5Data 3 Input/output
6Data 4 Input/output
7Data 5 Input/output
8Data 6 Input/output
9Data 7 Input/output
10 /ACK Input
11 BUSY Input
12 PE Input
13 SLCT Input
14 /AUTO FEED Output
15 /ERROR Input
16 /RESET Output
17 /SLCT IN Output
18 GND
19 GND
20 GND
21 GND
22 GND
23 GND
24 GND
25 GND
Note
Operational ground (GND signal) at the COMa or COMb ports is referenced tointernal ground.Suitable measures may be required on the process side to avoid ground loops.