Operating instructions Chapter 2
Flexi Classic
8011509/YPP0/2015-10-26 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 11
Subject to change without notice
On safety
2 On safety
This chapter deals with your own safety and the safety of the equipment operators.
= Please read this chapter carefully before working with the Flexi Classic modular safety
controller or with the machine protected by the Flexi Classic modular safety controller.
2.1 Qualified safety personnel
The Flexi Classic modular safety controller must be mounted, commissioned and serviced
only by qualified safety personnel.
Qualified safety personnel are defined as persons who …
• have undergone the appropriate technical training
and
• who have been instructed by the responsible machine operator in the operation of the
machine and the current valid safety guidelines
and
• have access to the operating instructions of the Flexi Classic and those of the particular
modules and have read and familiarised themselves with them
and
• have access to the operating instructions for the protective devices (e.g. C4000)
connected to the safety controller and have read and familiarised themselves with
them.
2.2 Applications of the device
The Flexi Classic modular safety controller is a configurable control system for safety
applications.
The category in accordance with EN ISO 13 849-1 or the SIL in accordance with IEC 61 508
and the SILCL in accordance with EN 62 061 depend on the external circuit, the realisation
of the wiring, the choice of the sensors and their location at the machine.
The device corresponds to up to category 4 in accordance with EN ISO 13 849-1; appli-
cations can reach up to SIL3 in accordance with IEC 61 508, up to SILCL3 in accordance
with EN 62 061 or PL e in accordance with EN ISO 13 849-1. The emergency stop function
in the device corresponds to stop category 0 or 1 in accordance with EN 60 204-1.
In order to reach the SIL3 safety level (see chapter 11 “Technical specifications” on
page 96) in accordance with IEC 61 508, the following test must be made at least every
365 days:
• The Flexi Classic system must be powered down.
• The Flexi Classic system must be powered up.
• All safety functions of the connected safety sensors must be verified.
The type of safety sensors as well as the method of wiring must be chosen according to
the category which is to be achieved.
Opto-electronic and tactile safety sensors (e.g. light curtains, laser scanners, safety switch-
es, sensors, emergency stop pushbuttons) are connected to the modular safety controller
and are linked logically. The corresponding actuators of the machines or systems can be
switched off safely via the switching outputs of the safety controller.
The Flexi Classic safety controller has been tested in accordance with UL 508.
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