I have a single channel output design which uses SIL3 Qx8_PP to drive a Hydraulic Valve with no feedback.
If the Hydraulic valve is a well tried component with High MTTFd, is it possible for this to be a PLc circuit? Or is this specifically excluded by the manual?
In the SAFEX installation manual Section 13.3.4.2.1 Single-channel switching relay or semiconductor output without testing it states that only PLb is achievable.
In Table 90 there is mention of SIL2 outputs with Category B circuit. However, there is no mention of SIL3 Outputs with Category 1 circuits. Is this a deliberate exclusion or is this perhaps something that was not thought of?
https://www.boschrexroth.com/media/a3953377-1914-4249-94e7-a6dfa2df9292
