Siemens S5-155U System Manual page 100

Power Supply Units
Establishing the cables
4 - 30
The following applies to selecting the cables for the terminals:
Terminals Cabling
Power supply
AC line Phase
Neutral
Protective
cond.
DC line Positive
Chassis 0 V
Protective
cond.
Load voltage input 24 V input (may be
(Voltage monitor, omitted if jumper
Ext. 24 V DC) BA-EX is closed)
Enable power Set jumper from
supply EN-U
H
≥ 3.6 V voltage at
EN, with respect to
output chassis
ground
Relay terminals,
also suitable to
230 V AC / 3 A
Monitor output
for 24 V
Note
A voltage of more than 50 V must not develop between the output
voltages and the protective conductor potential.
Max. Permissible
Conductor Cross-Sections
2
L 1 4 mm solid or 2.5 mm
flexible
2
N 4 mm solid or 2.5 mm
flexible
2
4 mm solid or 2.5 mm
PE flexible
2
L+ 4 mm solid or 2.5 mm
flexible
2
M 4 mm solid or 2.5 mm
flexible
2
4 mm solid or 2.5 mm
PE flexible
2
4 mm solid or 2.5 mm
flexible
2
4 mm solid or 2.5 mm
or apply flexible
2
4 mm solid or 2.5 mm
flexible
2
4 mm solid or 2.5 mm
flexible
C79000-B8576-C199-03
2
2
2
2
2
2
2
2
2
2
System Manual