Industrial machinery safety

Machine security is a complex, sensitive and expensive topic. The European Machinery Directive, international standards and machine safety in class SIL2 and SIL3 require highly specialized knowledge. Tekna Automazione e Controllo designs the automation of machines in safety by providing for the use of specialized safety equipment, relays and safety PLCs, which protect both the machinery and the operators. Typical functions include controlled starting after a pause, stopping movements when the operator requests access to dangerous areas of the machine ensuring operator safety, plus monitoring of movable guards and stopping movements, shutdown and emergency stop.

SIRIUS safety devices are the main components of a homogeneous and cost-effective safety chain. Whether EMERGENCY STOP, protective door/door monitoring, light array, laser scanner or press or punch press protection – with SIRIUS safety relays, safety applications can be optimally implemented under the both technical and economic aspects.

Siemens SIRIUS safety relay

Safety controllers from SICK support a simple, flexible and scalable solution for intelligent machine planning. These systems are characterized by their particular usability, which allows a very simple integration of the components of the safety control units. The compact design of these safety control systems is the ideal solution for a wide range of applications.

SICK safety controllers

Configurable safety relays are flexible, economical and easy to use. These relays are ideal for applications that require dual channel safety circuits and controls on different zones of machines. Guardmasters can be configured, using safety function blocks, to create certified SIL2 and SIL3 class safety applications.

Allen Bradley Guardmaster for safety

Phoenix safety relays are designed to safely acquire sensors and control actuators, offering numerous application possibilities, especially in machine building. The Phoenix Contact technology used in the safety relays offers maximum functional safety.

Phoenix safety relay

PNOZ safety relays control safety functions such as emergency stops, movable guards, light curtains, two-hand controls, speed, machine standstill. The evolution of safety relays has led to the development of safety systems with compact and configurable modular relays “ready for Plug-and-Play”.

PNOZ PILZ safety relay

Machine safety can be achieved by using safety CPUs in PLCs. and integrating safety modules in the I/O configuration for the management of sensors, barriers and access control, as well as the safety management of inverters and axis controls with SIL2 and SIL3 class data transmission protocols.

Allen Bradley PLC Guardlogix for safety

Within the P.L.C. Siemens F-series S7-1200 and S7-1500 both the automation program and the safety program coexist. To implement machine safety, it is necessary to integrate the safe I/O modules within the PLC configuration, write the safety program inside the CPU and connect the peripherals via the PROFIsafe protocol. The safe program is not affected by changes to the standard automation program.

Siemens safety integrated in PLCs