A/B 1771 OA Leakage

olands · Oct 6, 2005

I have a A/B 1771-OA card that has enough leakage to keep a 120v solenoid powered. Should I add a MOV or simply replace the card?

jstolaruk · Oct 6, 2005

MOV won't help. Leakage for that card should be 2ma maximum. If its greater than that than I would suspect the card. Can you check it against the solenoid specs?

Gerry · Oct 7, 2005

Low power loads may need some parallel resistance to reach the minimum load spec.

I haven't seen the problem with the 1771-OA but it was very common with the 1771-OM.

Contr_Conn · Oct 7, 2005

Put 16K+/1w or 12K+/2W resistor in parallel with load.
This will fix it.
It's imortant to have in parallel.

A/B 1771 OA Leakage

olands

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jstolaruk

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Gerry

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Contr_Conn

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