Weidmüller 1334950000, Manual

Page: 5 / 84

2 Safety | General safety notice
5 Manual u-control 2604080000/03/08.2020
2 Safety
This section includes general safety instructions for handling
the u-control system. Specific warning notices for specific
tasks and situations are given at the appropriate places in
the documentation. Failure to observe the safety and warn-
ing notices can result in damage to persons and material.
– When using I/O modules modules, please
also observe the Remote-I/O-System
u-remote Manual .
– When using safe I/O modules or safe feed-
in modules, please also observe the
Modules for Functional Safety Manual .
All manuals are available to download from the
Weidmüller website.
2.1 General safety notice
Work on the u-control products may only be performed by
qualified electricians with the support of trained persons.
As a result of their professional training and experience, an
electrician is qualified to perform the necessary work and
identify any potential risks.
Before any work is carried out on the products (installa-
tion, maintenance, retrofitting), the power supply must be
switched off and secured against being switched on again.
Work may be carried out with safety extra-low voltage (SELV/
PELV). When working during continued operations, the
emergency stop mechanisms must not be made ineffective.
The u-control products do not comprehend any components
or parts that can be maintained by the operator. If a malfunc-
tion on a u-control product cannot be fixed after following
the recommended measures (see Chapter 11), the product
in question must be sent back to Weidmüller. Weidmüller
does not assume any liability if the product has been tam-
pered with!
Electrostatic discharge
u-remote products can be damaged or destroyed by electro-
static discharge. When handling the products, the neces-
sary safety measures against electrostatic discharge (ESD)
according to IEC 61340-5-1 and IEC 61340-5-2 must be
observed.
All devices are supplied in ESD-protected packaging. The
packing and unpacking as well as the installation and di-
sassembly of a device may only be carried out by qualified
personnel and in accordance with the ESD information.
Open equipment
u-remote products are open equipment that may only be in-
stalled and operated in lockable housings, cabinets or electri-
cal operations rooms. Only trained and authorised personnel
may access the equipment.
For applications requiring functional safety, the surrounding
housing must meet at least IP54. The standards and guide-
lines applicable for the assembly of switch cabinets and the
arrangement of data and supply lines must be complied
with.
Fuse protection
The operator must set up the equipment so that it is pro-
tected against overloading. The 24 V DC power supply units
used must fulfill the SELV category, no matter whether they
supply the system or feed-in modules. The output voltage of
the feed-in power supply has to fulfill overvoltage category 1
according to IEC 61010. When connecting to outer current
circuits the respective overload category has to be regarded
for each single module of the u-control station (see technical
data).
The main switch, the switches of the subsequent circuits, the
cable cross sections and the fuse protection have to be con-
figured according to IEC 61010. The current demand must
be caluclated separately for each single u-control station as
described in section 4.6.
In the case of modules without fused sensor/actuator power
supplies, all lines to the connected sensors/actuators must
be fused corresponding to their conductor cross-section (as
per DIN VDE 0298 Part 4).
To meet UL-specifications in accordance with UL 248-14,
a UL-certified automatic fuse (e.g. ABB Type S201-B16)
or a 10 A fuse with a medium time-lag (e.g. ESKA Part No.
522.227) must be used.
All connections of the u-control components are protected
against voltage pulses and overcurrent in accordance with
IEC 61131-2, Zone B. The operator has to decide whether
additional overvoltage protection according to IEC 62305
is required. Voltages that /-30 V may cause the de -
struction of couplers and modules.
Earthing
Via an FE spring on its underside each controller and each
module is electrically connected to the DIN rail. This connec-
tion is only established certainly if the assembly is carried
out carefully and in accordance with the instructions (see
section 6.2). In order to ensure the earthing of the station
the DIN rail must be connected to the protective earth via the
earth terminals (PE).
Several modules have connections with green pushers. An
FE potential is also provided at these connections. They
must not be used as a PE!
Shielding
Shielded lines are to be connected with shielded plugs and
fixed on a shield bus in compliance with the relevant stand -
ard (see Chapter 7).