I am trying to use an AC/DC converter module developed by third party.
Is there any way I can do both at the same time?
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Yes, no problem doing both at the same time it's often done that way. If you are selecting the capacitors make sure they are safety rated X and Y capacitors. (If you don't know what that means make sure you research it prior to hooking anything up.) Also the value of the Y caps between hot and chassis ground should be such that if the chassis is somehow ungrounded there is not enough leakage current to present a shock hazard. There are regulatory requirements around that and you should understand those as well before selecting the caps. Another option is to buy an off-the-shelf EMI filter that includes the proper components.