BMS Safety Interlocks with Safety PLC's

Does anyone know if you can replace hardwired interlocks (high gas, low gas, fan on, over temp, etc.) for burner management systems with a safety PLC? I have an oven system with multiple zones and this would eliminate a panel full of interlock relays. I'm not trying to replace the BMS, just the interlocks by wiring them straight to safety input cards, series them in the plc and energize a safety output to the BMS. From this old thread it appears not but 8 years later, I'm hoping there's changes where you can use a safety plc without all the red tapes.

Yep
You can, I've used Siemens S7 300F to do it

The major question is how your system is governed by NFPA 86, the "Burner Code".

There was a good post on the topic a while ago, here:

http://forums.mrplc.com/index.php?showtopic=16443

NFPA 86 was updated in 2011 to include a section on programmable controls. If you plan to do this in-house, that's where you have to start.

I think you'll find that some of the functions, like high-gas and overtemperature, still have to be hardwired.

This is one of the few areas where I always defer to a qualified consultant.

Good info Ken!!