Volt-free contacts required? can be translated as "Are voltage-free contacts required?" ”What?
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In electrical data sheets, Volt-free contacts required? can be translated as "Are voltage-free contacts required?" ”What? This post was last edited by ship200 on 2008-1-8 12:33 ]
Volt-free contacts required Note that contacts is a plural here, so it should be a noun. It is called "contact", so it can be translated as "Are voltage-free contacts required/needed?" ”
Free here should mean "nothing", please refer to the translation: Are voltage-free contacts specified?
Requiring voltage-free contacts, doesn’t seem very professional FYI
Volt-free contacts Voltage-free contacts
What does Volt Free contact mean? Volt-free and dry contact mean the same thing. If a control system supplier offers a dry contact for you to read as a status bit, then he is offering to close a contact (relay or contact output) that is nothing more that a stand-alone set of contacts with no voltage, current, or anything else impressed across the contact set. It becomes the user's responsibility to determine how to sense that contact closure. Usually you do this by putting a voltage on one side and sensing the voltage on a return line from the other side of the contact when it closes. Once you apply voltage to the contacts, it becomes a wet contact. You "wet" the contact with a sensible voltage level. http://answers.yahoo.com/question/index?qid=20070601040505AAc51qB This post was last written by lihx_Edited by susan at 2008-1-3 19:20 ]
According to the opinion above, Volt Free contact should mean that the contact has no voltage and no grounding, that is, "dry". If a certain voltage (including grounding, 0V) is applied to it, then the contact should be live and non-free, that is, "wet"”