Siemens CPU 315-2 DP Hardware And Installation Guide

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S7-300 Automation System, Hardware and Installation: CPU 31xC and CPU 31x
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The figure below shows you the block diagram of a PROFIBUS subnet.
S5-95U
PG
1
3
S7-300
CPU
PS
CPU
31x-2 DP
MASTER
MPI addr. 0
MPI addr. 3
PROFIBUS
addr. 2
PROFIBUS
addr. 3
PROFIBUS
addr. 4
PROFIBUS
addr. 5
PROFIBUS
addr. 6
PROFIBUS
addr. 7
3
CPU
PS
ET 200M
CPU
PS
ET 200M
CPU
PS
ET 200 M
3
S7-300
CPU
PS
DP-CPU
CPU
PS
ET 200M
CPU
PS
ET 200M
CPU
ET 200B ET 200B
CPU
ET 200B
CPU
ET 200B
PROFIBUS
addr. 12
PROFIBUS
addr. 11
PROFIBUS
addr. 10
PROFIBUS
addr. 9
PROFIBUS
addr. 8
1
1
2
Figure 5-16 Example of a PROFIBUS subnet
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 Terminating resistor inserted
 PG connected by means of a stub cable for maintenance purposes

Siemens CPU 315-2 DP Specifications

General

Memory	64 KB
Power Supply	24 V DC
Order Number	6ES7 315-2AG10-0AB0
Number of DP Masters	1
Number of DP Slaves	124
Load Memory	64 KB
Number of Timers	256
Number of Counters	256
Data Memory	64 KB
Operating Temperature	0 to 60 °C
Integrated Interfaces	MPI, DP
Digital Outputs	Not integrated
Analog Inputs	Not integrated
Analog Outputs	Not integrated
Programming Languages	LAD, FBD, STL
Digital Inputs	Not integrated
Weight	660 g