Product overview
S7-300 Programmable Controller Hardware and Installation
A5E00105492-01
3-3
Horizontal Installation
Vertical Installation
You have to always position the CPU and the power supply
at the bottom or on the left.
SF
BUSF
DC5V
FRCE
RUN
STOP
SIEMENS
PS CPU
SF
BUSF
DC5V
FRCE
RUN
STOP
SIEM
E
N
S
PS
CPU
Figure 3-2 Horizontal and vertical installation of an S7-300
S7-300 modules
You can choose from a number of modules to install and commission an S7-300
PLCs. The table below shows the major modules and their function.
Table 3-1 S7-300 modules
Components Function Illustration
Profile rail
Accessory:
Shielding element
... is the module rack for an S7-
300
Power supply (PS) ... converts mains voltage
(120/230 VAC) to 24 VDC
operating voltage for the supply
of the S7-300 and 24 VDC load
circuits
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