Safe Automation

Modern innovative technologies allow to implement protective equipment directly to a production process&control system so that they generate as minimum as possible restriction for operating personnel and maintenance staff. The security of machines and production facilities has become the integral parts of design solutions. The objective is that these designed precautions would not complicate or slow the equipment control along with the high safety level of operating personnel to be hold.

At the design of electric installations we take into account the safety application norms ISO 13849-1 for construction of machines, IEC 62061 for analysis and evaluation of risks upon machines, IEC 60204-1 that defines stop categories, and not in the least line, IEC 61800-5-2 for evaluation of risks at safety installations (PLC, electric drives).


Design of safe automation in steps

  • Laws, regulations, standards
  • Evaluation of risks
  • Safe design
  • Technical precautions and application of safety functions
  • Information for the user on residual risks
  • Comprehensive verification of machine
  • Putting into operation
  • Responsibility of the user

Seriousness of injury S – Frequency and/or time duration of exposition F – Possibility of prevention P

  • S1 – light, reversible
  • S2 – serious, lethal
  • F1 – from seldom up to frequently and/or shortly
  • F2 – from frequently often up to lastly and/or during long time
  • P1 – it is possible
  • P2 – it is hardly possible

The procedure to choose the desired functional safety according to standard CSN EN 13849-1, that works with five steps of required – so called Performance Level.


ČSN EN 13849-1

We solve already the safety conception of projected equipment at the design basic sketch. Much often the concept of the safety PLC is designed using the Guard PLC by firm Allan Bradley or the Simatic Safety Integrated by firm Siemens.


Reference – Stock holding and cutting of aluminium semi-products

The stock of cut semi-products is controlled through the Allan Bradley PLC with the implemented processor ControlLogix 1756 and distributed peripheries Siemens ET200M, which communicate via the local industrial network PROFIBUS.

In front of the existing production process there is newly installed the equipment, based on the AB technique, for manipulation, storing and cutting of products. The equipment is designed in the SIL3 safety category / Category 4 as per the standard EN 954-1. The GuardLogix has replaced the existing ControlLogix, and Ethernet Point I/O modules, the operator interface PanelView Plus 700, frequency converters of 70 series and new 755 series with the Safe Torque Off upgrade are newly implemented.




Reference – Control System Reconstruction for 24-MW-output combustion chamber of thermal drying-plant for floatation extracts and coal slurries

The existing redundant safety control system Siemens Simatic S5-135F has been modernised. The newly designed control system Simatic S7-317F implements safety digital modules SM326. Programmed safety function blocks intended for gas and oil burners are used to control both the torch igniter and the main burner.