10
5756B
Installing the Controller Board
Possible Slots
The S7-300 PLC is row-oriented with a maximum of four rows
(0 through 3). Each row has a maximum of eight slots for I/O
modules.
Figure 9
Structure of a SIMATIC
®
S7-300 PLC
Rules for the Use of the Controller Board
The controller board can be operated in rows 0 through 3
(rows 1 through 3 for C7, SINUMERIK 810D and 840D PLCs)
in slots 4 through 11. The maximum number is two controller
boards per row.
Current consumption of the controller board:
The controller board occupies one slot in the analog PLC area
(16 byte inputs and 16 byte outputs).
Please note that the limited system resources of the
S7 CPU 312 prevent the controller board from being
operated in a PLC with this type of processor.
Maximum 300 mA at 24 V DC
Maximum
10 mA from the S7 backplane bus
P S
I M
P S
I M
P S
I M
3
4
6
5
7
1 1
9
8
C P U
2
1
0
1
2
3
P S
I M
6 4 0
7 5 2
5 1 2
6 2 4
4 9 6
3 8 4
2 5 6
2 7 2
. . .
. . .
. . .
. . .
2 8 8
3
4
6
5
7
1 0
1 1
9
8
3
4
6
5
7
1 0
1 1
9
8
3
4
6
5
7
1 0
1 1
9
8
5 7 5 6 A 0 1 0
S l o t n o .
3 6 8
1 0
( B a s e a d d r e s s )
A n a l o g a d d r e s s
