Siemens SIMATIC S7-1500 System Manual page 175

R/H CPUs and load current supply
Table 7-2 Wiring rules for R/H-CPUs and load current supply
Wiring rules for ...
Permitted cable cross-sections of solid cables (Cu)
Permitted cable cross-sec­
tions of flexible cables (Cu)
Number of wires per connection
Stripped length of the wires
End sleeves according to
DIN 46228
Sheath diameter
Tool
Connection system
Tightening torque
1) American Wire Gauge
Permissible cable temperature
NOTE
Permissible cable temperature
When selecting the cable, note that the cable temperature during operation can be up to
30 °C above the ambient temperature of the S7-1500R/H redundant system.
Example: If you use the system in a switchgear cabinet at an ambient temperature of 30 °C,
you must use a connecting conductor with a temperature range of at least 60 °C.
With terminals that carry a current load of ≥ 8 A during operation, you must expect a cable
temperature of up to 65 °C above the ambient temperature.
You can more exactly determine the required cable temperature for each application. To do
so, measure the cable temperature in the system at a load corresponding to the maximum
possible power and ambient temperature values.
You should specify other connection types and material requirements based on the electrical
characteristics of the circuits you use and the installation environment.
S7-1500R/H redundant system
System Manual, 11/2022, A5E41814787-AD
-
-
Without wire-end fer­ 0.25 to 2.5 mm
rule
AWG
With end sleeve 0.25 to 1.5 mm
AWG
1
10 to 11 mm
Without plastic sleeve Design A, 10 mm long
With plastic sleeve 0.25 Design E, 10 mm long
2
to 1.5 mm
-
3 to 3.5 mm screwdriver, conic
design
Push-in terminal
-
R/H-CPU
2
1)
: 24 to 14
2
1)
: 24 to 16
Wiring
7.4 Wiring rules
Load current supply
-
-
2
0.5 to 2.5 mm
1)
AWG : 20 to 14
2
0.5 to 1.5 mm
1)
AWG : 20 to 16
1
7 to 8 mm
Design A, 7 mm long
Design A, 7 mm long
8.5 mm
3 to 3.5 mm screwdriver, conic
design
Screw terminal
From 0.5 Nm to 0.6 Nm
175