Operating instructions Chapter 3
Flexi Classic
8011509/YPP0/2015-10-26 © SICK AG • Industrial Safety Systems • Germany • All rights reserved 15
Subject to change without notice
Product description
3 Product description
This chapter provides information on the special features and properties of the Flexi
Classic modular safety controller. It describes the construction and the operating principle
of the device.
= Please read this chapter before mounting, installing and commissioning the device.
3.1 Special features
The Flexi Classic series is a safety controller concept comprising different modules that
can be interconnected individually. This allows the system to be extended to up to 104
inputs or outputs.
Each of these modules has a compact width of 22.5 mm. The units are of plug-in style with
communication between the individual units over an internal bus.
The required logic and function is specified by means of rotary switches on the modules.
An exception thereof are the relay modules and the fieldbus modules that are used for
integration in a higher level controller without a safety function. These modules are output
units and have no effect on the logic set or the function of the upstream units.
safety controller
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