The SC485 Serial Connector converts the short range RS232 serial output of the computer into the industry standard, long range RS485 protocol. It is required to communicate between the PC and LOR light controllers. Only one SC485 is required to operate an entire network of LOR controllers.
NOT RECOMMENDED FOR MOST USES... UNLESS YOU HAVE A SPECIAL REASON TO USE A SERIAL PORT THIS IS NOT THE CONNECTOR YOU WANT... GET THE USB485