Which Type of Limit Switch

[manofgresley]

Yes it is a 24 volt Transformer, i fitted the Pilz on good advice off this site, cost £36.00. Ray

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.
.
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).
.
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.