CeeDee
Member
Just wanted to know what are people's thought on a triac output versus relay output cards? I'm working with the Allen Bradley SLC line, 1747-OA16 and 1747-OW16 output cards. I've used the OA16 before to control a solenoid manifold which operates high pressure valves. I snub each coil of course, for arc-quenching. I need to build another PLC controlled solenoid rack and it has worked in the past (still works today after years of service) using a 120V TRIAC output card, but it doesn't mean it is right, or the best way to do it.
I'm just wondering when it is better to use a triac or relay output card. What are the pros and cons? Does load current determine one or the other?
I'm just wondering when it is better to use a triac or relay output card. What are the pros and cons? Does load current determine one or the other?