P
Hello list members, I am driving several 24 VAC solenoid valves with relay outputs from my PLC (SLC503 with 1746-OW8 output modules). I know that MOVs are recommended across the load or contacts to minimize wear on the contacts (noise is not an issue here). My question is, what would be a "typical" percent reduction in contact life if MOVs are not used? The reason for my question is the fact that the wiring on the machine complicate MOV installation. The valve coils are typically rated at 70 VA inrush and 40 VA sustained, at 24 VAC.
One more question: the supply for the valves comes from a 24 VAC transformer; I want a low cost option for surge suppresion on this supply, and was thinking on using MOVs also. Any better suggestions?
Any comments will be appreciated. Thanks in advance.
Pat
One more question: the supply for the valves comes from a 24 VAC transformer; I want a low cost option for surge suppresion on this supply, and was thinking on using MOVs also. Any better suggestions?
Any comments will be appreciated. Thanks in advance.
Pat