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Thread: [RESOLVED] RS232/485 to TTL Connection

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  1. Jan 13th, 2011, 02:25 AM #7
    dilettante
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    Re: [RESOLVED] RS232/485 to TTL Connection

    FG may be "foil ground" (shielded twisted-pair cable). VP may be a supply voltage to power the device (?) and perhaps VG is the power and signal reference ground (?). Are you sure one of those FGs isn't SG (signal ground)?

    Half-duplex RS-485 is often used as a bus connector, implying the device may require a special protocol for operation.
    Last edited by dilettante; Jan 13th, 2011 at 02:31 AM.
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