S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
6-1
Wiring
6
6.1 Requirements for wiring the S7-300
This chapter
Describes the requirements for wiring the PS, CPU and front connectors.
Accessories required
The following accessories are required for wiring the S7-300.
Table 6-1 Wiring accessories
Accessories Description
Front connectors for connecting the sensors / actuators of the
system to the S7-300
Labeling strips for labeling the module I/Os
Shielding contact element, shielding terminals
(matching the shielding diameter)
for connecting cable shielding
Tools and material required
Tools and materials required for wiring the S7-300.
Table 6-2 Tools and material for wiring
To ... you need ...
Connect the protective conductor to the rail Wrench (size 10)
Protective conductor cable (cross-
section ≥ 10 mm
2
) with M6 cable lug
M6 nut, washer, spring lock washer
Adjust the power supply module to mains voltage Screwdriver with a blade width of 4.5 mm
Wire the power supply module and the CPU Screwdriver with a 3.5-mm blade, side-cutters,
stripping tool
Flexible cable, for example, sheathed flexible
cable 3 x 1.5 mm
2
Wire end ferrules to DIN 46228
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