Siemens-Universal-Serial-Interface-Module-6ES7241-1CH30-1XB0-CB-1241-Siemens-6ES7241-1CH30-1XB0-P-The-Siemens-Universal-Serial-Interface-USS-Communication-Module-sends-instructions-to-control-the-operation-of-motor-drives-which-support-the-universal-serial-interface-USS-protocol-You-can-use-the-USS-instructions-to-communicate-with-multiple-drives-through-the-RS485-connections-to-CM-1241-RS485-communication-modules-or-a-CB-1241-RS485-communication-board-Up-to-three-CM-1241-RS422-RS485-m