Wiring
6.1 Requirements for wiring the S7-300
S7-300, CPU 31xC and CPU 31x: Installation
6-2
Operating Instructions, Edition 08/2004, A5E00105492-05
To ...
you need ...
Wire the front connector
Screwdriver with a 3.5-mm blade, side-cutters,
stripping tool
Flexible cables, 0.25 mm
2
to 0.75/1.5 mm
2
Shielded cables as required
Wire end ferrules to DIN 46228
Wiring conditions for PS and CPU
Table 6-3
Wiring conditions for PS and CPU
Connectable cables
to PS and CPU
Solid conductors
No
Flexible conductors
•
without wire end ferrule
•
With wire end ferrule
0.25 mm
2
to 2.5 mm
2
0.25 mm
2
to 1.5 mm
2
Number of conductors per terminal
1 or 2, up to 1.5 mm
2
(total) in a common wire
end ferrule
Diameter of the conductor insulation
max. 3.8 mm
Stripped length
11 mm
Wire end ferrules to DIN 46228
•
without insulating collar
•
with insulating collar
Design A, 10 mm to 12 mm length
Design E, up to 12 mm length
Wiring conditions for front connectors
Table 6-4
Wiring conditions for front connectors
Front connectors
Connectable cables
20-pole
40-pole
Solid conductors
No
No
Flexible conductors
•
without wire end ferrule
•
with wire end ferrule
0.25 mm
2
to 1.5 mm
2
0.25 mm
2
to 1.5 mm
2
0.25 mm
2
to 0.75 mm
2
0.25 mm
2
to 0.75 mm
2
•
Mains feed 1.5 mm
2
Number of conductors per
terminal
1 or 2, up to 1.5 mm
2
(total) in a
common wire end ferrule
1 or 2, up to 0.75 mm
2
(total) in a
common wire end ferrule
Diameter of the conductor
insulation
max. 3.1 mm
•
max. 2.0 mm for 40-pole
cables
•
max. 3.1 mm for 20-pole
cables
Stripped length
6 mm
6 mm
Wire end ferrules to DIN
46228
•
without insulating collar
•
with insulating collar
Design A, 5 mm to 7 mm length
Design E, up to 6 mm length
Design A, 5 mm to 7 mm length
Design E, up to 6 mm length
