Which Type of Limit Switch

[Clive S]

This is maybe a daft question, but do not see a 24v supply for the PILZ unless it is that box to the left of it on the DIN rail.
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What do these safety relays do that makes them cost £360? I can see a 4 pole contactor, which is presumably 3 phases and aux and I also presume there is some sort of RCCB and E-stop interface. If you are not running 3-phase, then it seems an overkill ('scuse the ironic pun).
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An RCCB a break switch and NVR switch in series, would seem all that is needed for a good level of safety on single phase 240v.

I must be going blind as I don't see a 4 pole contactor the schematic is showing 240V I have picked up those pilz for less than £10 on ebay. ..Clive