UNO-PS/1AC/24DC/30W
105516_en_00 PHOENIX CONTACT 11
8 Installing the power supply unit
8.1 Safety regulations and installation notes 8.2 Mains connection
The device can be connected to single-phase AC or three-
phase power grids (TN-S, TN-C, TT, and IT) while consider-
ing the nominal input voltage.
Figure 5 Network types
WARNING: risk of electric shock!
Only qualified specialist personnel may in-
stall, start up, and operate the device. Ob-
serve the national safety and accident
prevention regulations.
Prior to installation, disconnect the input volt-
age and make sure that it cannot be switched
on again unintentionally.
Mains connection must be performed by spe-
cialist personnel and protection against elec-
tric shock ensured.
Make sure that the device can be switched off
outside the power supply according to the
regulations in EN 60950 (e.g., by line protec-
tion on the primary side).
Cover termination area after installation in or-
der to avoid accidental contact with live parts
(e.g., by installing in a control cabinet).
Protect the device against ingress by foreign
bodies, e.g., paper clips or metal parts.
WARNING:
Make sure that all supply lines are sufficiently
dimensioned and have sufficient fuse protec-
tion.
Make sure that all output cables are dimen-
sioned accordingly for the maximum device
output current or have separate fuse protec-
tion.
NOTE:
Never open or repair the device yourself.
Internal fuses will only blow in the event of de-
vice malfunction. Do not modify or attempt to
repair the device. Send the device to the fac-
tory for examination.
For operation on two of the phase conductors
of a three-phase system, an isolating facility
for all poles must be provided.
TN-S TN-C
L
N
PE
+
LN
-
L
PEN
+
LN
-
TT iT
+
LN
-
L
N
+-
L
N
L1
L2
L3
