The PSSuniversal modular remote I/O safety system can be used to build a structure of decentralized inputs and outputs with pure standard control functions or, in conjunction with SafetyBUS p, with pure safety functions, as well as intelligent dovetailing of both worlds.
In practical terms, PSSuniversal modular remote I/O safety system means linking the primary safety controller via fieldbus, such as the SafetyBUS p to the remote PSSuniversal modular remote I/O safety system, where blocks of I/O are housed. The blocks can be assigned to either safety or non-safety devices. Because the non-safety devices connect directly to the standard programmable logic controller (PLC), this makes a parallel remote I/O module unnecessary, dramatically simplifying the network.
While bringing both safety and standard control together in one technology, the PSSuniversal modular remote I/O safety system preserves the separation between the two responsibilities. Independence is achieved using the “enable principle” at a local level, drawing information from both control sections and switching the safety-related outputs in the field directly. This, says Pilz, prevents errors and allows for the standardisation of the safety-related solution.
The PSSuniversal modular remote I/O safety system carries the tag of ‘futureproof’, thanks to its modular structure. The flexible design comprises various head modules combined with base modules that are simply connected alongside.
Electronic modules are installed on to these base modules to suit the application and, because modules are available in groups of two or four, users only pay for those they need. Already, the PSSuniversal modular remote I/O safety system is compatible with all common fieldbus systems and Pilz has signalled the availability of different head modules for Ethernet-based concepts.
The modular remote I/O safety system's whole design meets Category 4 in accordance with AS 4024.1 or SIL 3 under AS 61508.