Siemens Simatic M7-400 User Manual

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
2 Data 0 Input/output
3 Data 1 Input/output
4 Data 2 Input/output
5 Data 3 Input/output
6 Data 4 Input/output
7 Data 5 Input/output
8 Data 6 Input/output
9 Data 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 to
internal ground.
Suitable measures may be required on the process side to avoid ground loops.

Siemens Simatic M7-400 Specifications

General

Series	Simatic M7-400
Processor	Varies depending on CPU model (e.g., Intel 80486, Pentium)
Supply voltage	24 V DC
Digital inputs	Varies depending on I/O module
Digital outputs	Varies depending on I/O module
Analog inputs	Varies depending on I/O module
Analog outputs	Varies depending on I/O module
Communication	PROFIBUS, PROFINET
Communication Ports	MPI, PROFIBUS
Operating Temperature	0°C to 60°C