PSR-PS20
106252_en_02 PHOENIX CONTACT 6
5Safety notes
WARNING: Risk of electric shock
During operation, parts of electrical switching
devices carry hazardous voltages.
Before working on the switching device, dis-
connect the power.
Please observe the safety regulations of elec-
trical engineering and industrial safety and lia-
bility associations!
Disregarding these safety regulations may re-
sult in death, serious personal injury or dam-
age to equipment.
Startup, mounting, modifications, and up-
grades should only be carried out by a skilled
electrical engineer!
WARNING: Risk of automatic machine re-
start!
For emergency stop applications, the ma-
chine must be prevented from restarting auto-
matically by a higher-level control system.
Protective covers must not be removed when
operating electrical switching devices.
WARNING: Danger due to faulty devices!
The devices may be damaged following an er-
ror and correct operation can no longer be en-
sured.
In the event of an error, replace the device im-
mediately.
Repairs to the device, especially if the hous-
ing must be opened, may only be carried out
by the manufacturer or authorized persons.
Otherwise the warranty is invalidated.
WARNING: Risk due to incorrect installa-
tion
For reliable operation, the safety relay must
be installed in housing protected from dust
and humidity (IP54).
Carry out wiring according to the application.
Refer to the “Application examples” section
for this.
WARNING: Risk due to welded relay con-
tacts
A suitable and effective protective circuit is to
be provided for inductive loads. This is to be
implemented parallel to the load and not par-
allel to the switch contact.
WARNING: danger due to magnetic inter-
ference!
Do not use the device in the vicinity of strong
magnetic fields (e.g.,caused by transformers
or magnetic iron). The magnetic field strength
of the environment must not exceed 30A/m.
NOTE: Risk of damage to equipment due
to noise emissions
When operating relay modules the operator
must meet the requirements for noise emis-
sion for electrical and electronic equipment
(EN 61000-6-4) on the contact side and, if re-
quired, take appropriate measures.
NOTE: Risk of damage to equipment due
to noise emissions
This is a Class A product. In a domestic envi-
ronment it may cause radion inteference, in
which case the user may be required to take
adequate measures.
Only use power supply units with safe isola-
tion and SELV/PELV in accordance with EN
50178/VDE 0160 (SELV/PELV).
NOTE: Electrostatic discharge!
The device contains components that can be
damaged or destroyed by electrostatic dis-
charge. When handling the device, observe
the necessary safety precautions against
electrostatic discharge (ESD) according to
EN 61340-5-1 and EN 61340-5-2.
