Wiring
5.4 Wiring rules
S7-1500R/H redundant system
114
System Manual, 10/2018, A5E41814787-AA
5.4
Wiring rules
Introduction
Use suitable cables to connect the S7-1500R/H redundant system. The tables below set out
the wiring rules for the R/H-CPUs, system power supply, and load power supply.
R/H-CPUs, system power supply and load power supply
Table 5- 2
Wiring rules for R/H-CPUs, system power supply and load power supply
Wiring rules for ...
R/H-CPU
System power and load current
supply
Permitted cable cross-sections of solid cables (Cu)
-
-
-
-
Permitted cable cross-
sections of flexible cables
(Cu)
Without wire end
sleeve
0.25 to 2.5 mm
2
0.5 to 2.5 mm
2
AWG
1)
: 24 to 14
AWG
1)
: 20 to 14
With end sleeve
0.25 to 1.5 mm
2
0.5 to 1.5 mm
2
AWG
1)
: 24 to 16
AWG
1)
: 20 to 16
Number of wires per connection
1
1
Stripped length of the wires
10 to 11 mm
7 to 8 mm
End sleeves according to
DIN 46228
without plastic sleeve Design A, 10 mm long
Design A, 7 mm long
with plastic sleeve 0.25
to 1.5 mm
2
Design E, 10 mm long
Design A, 7 mm long
Sheath diameter
-
8.5 mm
Tool
3 to 3.5 mm screwdriver, conic
design
3 to 3.5 mm screwdriver, conic
design
Connection system
Push-in terminal
Screw terminal
Tightening torque
-
from 0.5 Nm to 0.6 Nm
1)
American Wire Gauge
Permissible cable temperature
Note
Permissible cable temperatures
You must select sufficiently large wire cross-sections to ensure that the permissible cable
temperatures are not exceeded at the maximum ambient temperature of the redundant
system S7-1500R/H.
Example of power supply
At an ambient temperature of 40° C, a current of, for example, 4 A per wire and a cross-
section of 1.5 mm² Cu, a connecting conductor must be rated for a temperature range of at
least 70° C.
Summary of Contents for Simatic S7-1500H
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