Die Anfrage
“Create an interlocked valve ladder with open and close pushbuttons, seal-in contacts, a normally closed emergency stop, a valve B closed permissive, and separate open and close outputs for valve A.”
Dann probieren SieAdd open and closed limit switches for valve A.Add an alarm output for emergency stop.
Was diese Zeichnung zeigt
Die dahinterstehenden Entscheidungen verstehen.
01
Seal-in logic for maintained command using parallel branched contacts
02Cross-cancellation
open pushbutton drops close command and vice-versa
03
Series XIO contacts for emergency stop and permissive interlock (valve B closed limit)
Any process automation where safe valve sequencing is critical, e.g., chemical dosing, water treatment, pharmaceutical batch control.