Operating instructions
Chapter
6
Flexi Classic
8011509/YPP0/2015-10-26
© SICK AG • Industrial Safety Systems • Germany • All rights reserved
83
Subject to change without notice
Electrical installation
6
Electrical installation
Switch the entire machine/system off line!
The machine/system could inadvertently start up while you are connecting the devices.
•
The Flexi Classic modular safety controller fulfils the EMC requirements in accordance
with the basic specification EN 61
000-6-2 for industrial use and EN 61
131-2 for con-
trol systems.
•
The control cabinet or mounting housing of the Flexi Classic must at least comply with
enclosure rating IP 54.
•
The modules of the Flexi Classic family conform to Class A, Group 1, in accordance with
EN 55
011. Group 1 encompasses all ISM devices in which intentionally generated
and/or used conductor-bound RF energy that is required for the inner function of the
device itself occurs.
•
Mounting according to EN 50
274
•
In order to ensure EMC safety, the DIN mounting rail must be connected to FE.
•
You must connect the Flexi Classic to the same voltage supply as the connected protec-
tive devices.
•
To meet the requirements of the relevant product standards (e.g. EN 61
496-1), the
external voltage supply for the devices (SELV) must, among other aspects, be able to
bridge a power failure lasting 20 ms. Suitable power supplies are available as acces-
sories from SICK.
•
When several power supplies are used, all mass connections (GND) must be connected
to each other.
•
All UE410-GU modules that are on a common global emergency stop cut-off path must
be connected to the same GND connection.
•
The power supply as well as all signals connected have to fulfil the regulations for extra-
low voltages with safe separation (SELV, PELV) in accordance with EN 60664 and
EN 50178 (equipment of electrical power installation with electronic devices) or NEC
Class 2 according to UL 1310.
•
For installation in environments with overvoltage category III, external protection
elements must be used. The required level of protection as per EN 62
305-1 can be
achieved using an external snubber circuit. The protection elements (SPD – surge
protective devices) must comply with the requirements as per EN 61
643-11.
•
The cables of a connected reset button must be laid in separate plastic-sheathed
cables.
•
All connected sensors and downstream controllers and wiring/installation must corres-
pond to the required category according to EN ISO 13
849-1 and to the SILCL according
to EN 62
061 (e.g. protected installation, single plastic-sheathed cable with shielding
etc.).
•
In order to protect the safety outputs and to increase the life of the module, the external
load must be equipped with e.g. varistors and RC circuits. Please also note that the
selection of the arc suppression can increase the total response time of the safety
function.
WARNING
Notes
