The CPT-COM-B provides an isolated RS232 output from a 3V TTL Serial input. The board is designed to be used with the Creative Power range of MCU/MCU Controller cards. The 3V TTL Serial interface is the standard interface available on almost all Creative Power controller boards.
The CPT-COM-B board is powered from the 3.3V supply on the 3V TTL level connector. The isolated supply can be powered via an on-card DC/DC converter, an external 7-20V supply or from an on-card 9V battery