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Author Topic: Design Considerations For "Larger" System  (Read 22851 times)

Controls Guy

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Re: Design Considerations For "Larger" System
« Reply #15 on: October 23, 2019, 03:04:46 PM »
Quote from: ADC Product Engineer on October 23, 2019, 02:54:10 PM
I'm not here to convince anyone.  I'm here to share 30 years of knowledge.  I always suppress anymore.  YMMV

Agreed, that's my attitude too.  I still got 5 years on you, though!  ;)
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I retract my earlier statement that half of all politicians are crooks.  Half of all politicians are NOT crooks.  There.

jwbaker3

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Re: Design Considerations For "Larger" System
« Reply #16 on: October 24, 2019, 10:20:50 AM »
I agree I use DC and interposing relays on the outputs. The relays have a diode to suppress the surge from the coil. I have never (in 40+ years, yes I am old AB 2/15 was the first PLC I installed) had a problem with the output card on the PLC. I do snub the load on the output side to improve the relay life, and if the load is large I will use a zero cross solid state relay to switch the load.

JW
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