Are there port powered converters that provide an option for external power?
There are a number of port powered converters that provide an option for external power. All of our port powered converters with terminal blocks have the option of external power being added on the terminal block. Some converters, such as the 485LPCOR, 422LP25N, and 422LP25R are port powered and can also have external power added to pins on the 25 pin connector.