PFD Calculations for Safety Loops

[AhmedI12]

In a Quantum to M580 (Safety) migration project, I’m working on Safety Instrumented Function (SIF) calculations. I already have the published PFD values for the M580 CPU, BMXSAI input modules, and BMXSDO output modules, however  I’d like some clarification on two points:

Multiple I/O channels in non-redundant use

If I use multiple input channels from a single BMXSAI module (each for an independent sensor in 1oo1), or multiple outputs from a BMXSDO module (each for independent valves/relays), how should I handle the PFD contribution of Input/ Output modules and channels? Should I simply sum up the published per-channel PFD values, or is there any Schneider guidance/documentation on how to correctly treat common-cause vs. per-channel contributions in such cases?

Telefast ABE7R16T230 Relay Module

The legacy system used these relay modules in some loops. I can't find any SIL data so it's likely not SIL certified. What’s the recommended way to account for it in SIF reliability assessments?

Any guidance would be much appreciated.