I'm looking for any guidelines and/or tools to use in sizing the 24Vdc power supply for a safety PLC which uses an energize to trip philosophy. In addition, is there any derating that could be done on such a system, or does one have to look at the worst case scenario (i.e. all inputs and...
We are installing several photo eyes on a conveyor system to detect if there is a package backup on the conveyor. In the past I have used YS as the indentification for this (event, state, presence), but on this particular project some other ideas are being passed around (ZS). What ISA...
Has anyone had any experience in performing P&T compensation for a flow
trip in a SIL application? Our process currently employs a 2oo2 voting scheme for tripping using 2 SIL rated DP transmitters on an orifice plate. We are contemplating adding P&T compensation on these trips and are trying to...
