Wiring Rules - Siemens SIMATIC S7-1500 Getting Started

2.3.2

Wiring rules

Operation of an S7-1500 CPU in plants or systems is defined by special set of rules and
regulations, based on the relevant field of application.
You can find the general rules and regulations for operating the S7-1500 in the S7-1500
system description (http://support.automation.siemens.com/WW/view/en/59191792).
Wiring rules for the CPU
Wiring rules...
Connectible wire cross-sections for solid wires
Connectible wire Without wire end ferrule 0.25 to 2.5 mm
cross-sections for
stranded wires
With wire end ferrule
Number of wires per connection
Length of stripped wires
End sleeves Without plastic sleeve
according to
DIN 46228
with plastic sleeve 0.25
to 1.5 mm
Sheath diameter
Tool
Connection method
Tightening torque
* AWG: American Wire Gauge
S7-1500
Getting Started, 05/2014, A5E03981761-AC
CPU
—
—
AWG : 24 to 16
*
0.25 to 2.5 mm
AWG : 24 to 16
*
1
10 to 11 mm
Design A, 10 mm
long
Design E, 10mm long Design E, 10 mm and
2
—
3 to 3.5 mm Phillips
screwdriver, conic
design
Push-in terminal
—
40-pin front connector
(screw-type connection)
up to 0.25 mm
2
AWG : 24
*
0.25 to 1.5 mm
2 2
AWG : 24 to 16
*
0.25 to 1.5 mm
2 2
AWG : 24 to 16
*
1 or a combination of 2
cables up to 1.5 mm
(total) in the same wire
end ferrule
10 to 11 mm
Design A, 10 mm and
12 mm long
12 mm long
—
3 to 3.5 mm Phillips
screwdriver, conic design
Screw terminal
from 0.4 Nm to 0.7 Nm
Hardware section
2.3 Wiring
Load power supply
—
—
1.5 mm
2
AWG : 16
*
1.5 mm
2
AWG : 16
*
1
2
7 to 8 mm
Design A, 7 mm long
Design A, 7 mm long
8.5 mm
3 to 3.5 mm Phillips
screwdriver, conic
design
Screw terminal
from 0.5 Nm to 0.6
Nm
21