No, most even small machines arrive with a kind of "Safety Integeated" right in the PLC. Even the smallest PLCs like a Siemens S7 1200 are now aviable with Safety Integrated. So Profi-Safe and ASi-Safe are very common. It does reduce A LOT of wiring. But of course brings new problems, for example RJ45 jack and plugs sometimes break the connection for a very short time if you touch it and you lose a safety packet over Profi-Net and .. boom .. emergency stop.
Special if you use a lot of drives in a machine, any kind of Safety Integrated reduce the wiring a lot and makes cabinets much much smaller.
But on the other side, for just once, yes I like Pilz PNOZ. Easy to use .. and I'm pretty sure you can buy a PNOZ even in 100 years.
It needs a little extra to meet PLd/e, no? I usually work with Allen-Bradley, my Siemens experience is rather lacking.
Most of our customers would run away screaming from anything that's not hardwired safety, and are too cheap to shell out for a fully-blown safety PLC like the GuardLogix.
Yes of course it needs a bit of extra. But for a pretty "low" price these days.
Special if you build the same machine many times, you can safe much wiring time.
Most maintenance people like hardware solutions because they are more easy to bridge ...
With a software solution you can show easy for each safety button/switch a message on a display. Do it with a wired safety.
Special if you use a lot of drives in a machine, any kind of Safety Integrated reduce the wiring a lot and makes cabinets much much smaller.
But on the other side, for just once, yes I like Pilz PNOZ. Easy to use .. and I'm pretty sure you can buy a PNOZ even in 100 years.