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IO-Link safety system is ‘the first’ to operate at the field level
Pilz claims to be offering the first safe field-level communication system based on the IO-Link communications system. Its new IO-Link Safety (IOLS) system comprises a master, field devices and accessories. The package is said to make it easier to integrate IO-Link Safety technology into plant and machinery, and to exploit the benefits of the non-proprietary IO-Link system for functional safety.
Among the first Pilz devices to be equipped with IOLS functions are its PSENopt II advanced safety light curtains, PITgatebox controller and PDP67 safety master.
The system offers safe, standardised point-to-point communications, allowing safety sensors and actuators to be integrated into any existing fieldbus system, independent of higher-level systems. The IO-Link Safety communication protocol is standardised in IEC 61139-2 and offers safety up to PL e (EN ISO 13849-1) or SIL 3 (IEC 61508/62061). Users only need one fieldbus for a variety of safety requirements.
The PDP67 IOLS safety master acts as an interface to a safety controller, enabling bidirectional communications with the field level. Safety sensors with IO-Link Safety can be connected to the master, alongside IO-Link Safety devices. It is also possible to connect standard IO-Link sensors and actuators, as well as older safety sensors with OSSD outputs, for example. Sensors such as the PSENopt advanced IOLS safety light curtain can be switched to the OSSD technology.
The IO-Link Safety sensors provide status information and intelligent diagnostics. They can be identified and parameterised automatically. This makes it easier to swap components and reduces downtime for repairs. Also, fewer different device types are needed, simplifying purchasing and saving storage space. As a result, costs can be cut and productivity enhanced.
Seamless communications with every sensor and actuator allows data to be evaluated intelligently. The IO-Link Safety communications are carried by unshielded cables and use standard connectors. This saves time and money when swapping devices.
Intelligent IO-Link Safety devices also offer diagnostic functions such as self-diagnostics, supporting preventive repair and maintenance strategies. For preventive maintenance, for example, single-beam evaluation of the PSENopt advanced IOLS safety light curtains provides information about signal strengths.
Pilz says its IO-Link Safety package supports networked plant and machinery to the sensor and field level with a simple, non-proprietary solution, opening up new possibilities for Industry 4.0.
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