User manual

2 Safety | General safety notice
7Manual u-remote1432790000/08/12.2015
2 Safety
This section includes general safety instructions for handling
the u-remote system. Specic safety instructions for specic
tasks and situations are given at the appropriate places in
the documentation.
When using u-remote PF-O-xDI-SIL modules,
please also observe the Module for Func-
tional Safety Manual.
The manual is available to download from the
Weidmüller website.
2.1 General safety notice
Work on the u-remote products may only be performed by
qualied electricians with the support of trained persons.
As a result of their professional training and experience, an
electrician is qualied to perform the necessary work and
identify any potential risks.
Before any work is carried out on the products (installa-
tion, maintenance, retrotting), the power supply must be
switched off and secured against being switched on again.
Work may be carried out with safety extra-low voltage.
When working during continued operations, the emergency
stop mechanisms must not be made ineffective.
If a malfunction on a u-remote product cannot be xed after
following the recommended measures (see Chapter 13), the
product in question must be sent back to Weidmüller. Weid-
müller does not assume any liability if the base or electronic
module has been tampered 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 qualied
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 guidelines applicable for the assembly
of switch cabinets and the arrangement of data and supply
lines must be complied with.
Fusing
The operator must set up the equipment so that it is protect-
ed against overloading. The upstream fuse must be designed
such that it does not exceed the maximum load current. The
maximum permissible load current of the u-remote compo-
nents can be found in the technical data.
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-specications in accordance with UL248-14,
a UL-certied 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-remote 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 exceed +/-30V may cause the de-
struction of couplers and modules.
The output voltage of the feed-in power supply has to fulll
overvoltage category1 according to IEC61010.
Earthing (functional earth FE)
Each u-remote I/O module is tted with an FE spring on the
underside which creates an electrical connection to the DIN
rail. In order to establish a secure connection, the assembly
must be carried out carefully in accordance with the instruc-
tions (see Chapter7). The module is earthed by connecting
the DIN rail to the protective earth via the earth terminal.
Modules UR20-16AUX-FE, UR20-4DI-P, UR20-4DO-P,
UR20-4AI-UI-12 and UR20-4AI-UI-16 have connections with
green pushers. An FE potential is also provided at these con-
nections. They must not be used as a PE!
Shielding
Shielded lines are to be connected with shielded plugs and
xed on a shield bus in compliance with the relevant stand-
ard (see Chapter8).