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Interface-powered converters.Interface-powered convertersPlug directly into RS-232 devices Interface-powered converters plug directly into RS-232 devices, eliminating the need for external power supplies. These converters draw their power from the connected RS-232 device’s signals, normally the Transmit Data (TD), Request to Send (RTS), and Data Terminal Ready (DTR) pins. A few things to keep in mind When using an interface-powered converter, there are a few things to keep in mind, such as how much power is available from the RS-232 port—and how much power is dissipated in the system.
The chart below compares several types of driver-integrated circuits.
*NOTE: The voltage inverter in the interface-powered converter dissipates power when converting negative voltage. |