6.2.2
Wiring the Power Connection
Cross-sections depend on
current consumption
use min. 4 mm².
For higher current consumption
24 VDC
A = Terminal block 4 mm²
B = Terminal block 10 mm²
Length max. 4 m
6 mm²
(blue)
0 V load
24 V load
Earth bar
X1S1
UPS
L2
L3
10 mm² (green/yellow)
L1
PE
A
B
A
Power unit acc. to
EN 50178: SELV
Functional earth
PC
Required cross-sections and permitted
The permitted cable lengths are
PE
W1
N
V1
PE
PE
PE
U1
PE
L1
L2
L3
N
PE
PE
N
U2
PE
PE
N1
U2
L1.1
L2.1
L3.1
N
PE
e.g.drives
Transformer
6 mm² (green/yellow)
16 mm² (green/yellow)
min. 16 mm² (green/yellow)
all housing parts (functional earth)
to the device
to the housing of the control cabinet
PE neutral point
230V
400V
Fuses, better: protective motor switches
4 mm² (green/yellow)
16 mm² (green/yellow)
4 mm² (green/yellow)
4 mm² (green/yellow)
230 V power supply
leads
Overvoltage
Overvoltage
category III
Overvoltage category III
FE
N1
U2
PE
X1N1
X1S2
X10
Easily removable and visible.
PE bars should be preferably installed on the mounting
plate. In the case of isolated PE bars both ends must
be connected to the mounting plate by means of copper
strips with a maximum length of 20 cm.
The cross-section of the copper strips has to be at least
equal to that of the incoming cable.
Overvoltage category I
Overvoltage
(3)
(1)
(1)
(2)
(3) An X1N1 is connected to an UPS that supplies several
= Terminals in isolated arrangement
category II
acc. to EN 60742
N conductor:
Use only with
permission of
the operator!
operatorterminals
Sservice plug receptacle(s)
cable lengths are sepecified in the
documentation of the connected
device (PC).
category II
specified in the chapter "UPS wiring"
control cabinets with an uninterruptible power supply.
In this case also overvoltage category II applies.
(2)
10 mm² (green/yellow)
use 2 × 4 mm².
Fig.6-4:
Wiring the power connection: 24 VDC to the UPS and 115/230 VAC to
the UPS when 400 V supply voltage of the 24 V power supply unit are
applied
Project Planning Manual | Rexroth IndraControl VAU 01.1Z
Electric Drives
and Controls
| Bosch Rexroth AG
23/45
Interfaces, Display and Operating Components
