User Documentation
6 Installation and replacement
71u-remote IP20 modules for functional safety manual 1484600000/07/11.2020
WARNING
Explosion risk!
▶ Before assembly or replacement, make
sure that there is not a potentially explo-
sive atmosphere!
▶ For applications in potentially explosive
atmospheres, observe the installation and
construction requirements of EN60079-
15 and/or country-specific regulations.
WARNING
Dangerous contact voltage!
▶ All work on the u-remote station must be
carried out with the power supply discon-
nected.
▶ Make sure that the place of installation
(switch cabinet etc.) has been
disconnected from the power supply!
ATTENTION
The product can be destroyed by elec-
trostatic discharge!
The components in the u-remote series can
be destroyed by electrostatic discharge.
▶ Please make sure that personnel and work
equipment are sufficiently earthed!
▶ Carry out all work during the installation and removal as
well as replacement of components as described in the
u-remote manual.
When using modules for functional safety (safe I/O modules
or safe power-feed modules), please observe the following
additional notes:
– The modules may only be installed in lockable switch
cabinets which meet protection class IP54.
– Please use wire-end ferrules in combination with flexible/
multi-conductor cables.
– Ensure that external short circuits due to the cabling can-
not occur for safety inputs in the configuration without
test pulses (see DINENISO13849-2 Table D.4).
Once an electronic unit is removed from a safe
power-feed module, the inputs and outputs of the
subsequent modules are no longer supplied with
power. This is equivalent to triggering the con-
nected safety equipment!
6 Installation and replacement